Mathieu Desnoyers [Tue, 3 Sep 2013 21:23:15 +0000 (17:23 -0400)]
Fix: metadata stream should not reference session
The metadata stream should only reference the metadata cache, not the
session. Otherwise, we end up in a catch 22 situation:
- Stream POLLHUP is only given when the session is destroyed, but,
- The session is only destroyed when all references to session are
released, including references from channels, but,
- If the metadata stream holds a reference on the metadata session, we
end up with a circular dependency loop.
Fix this by making sure the metadata stream does not use any of the
lttng channel nor lttng session.
Reviewed-by: Julien Desfossez <jdesfossez@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Tue, 3 Sep 2013 14:25:00 +0000 (10:25 -0400)]
Fix: btrfs: support 3.11 Linux kernel
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Tue, 3 Sep 2013 14:16:19 +0000 (10:16 -0400)]
statedump: remove KERN_DEBUG messages
They appear to be shown by default in dmesg of many distributions, and
they don't add much value (noisy).
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Tue, 3 Sep 2013 13:44:32 +0000 (09:44 -0400)]
Fix: ext4: add missing tracepoints for 3.11 kernel
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Tue, 3 Sep 2013 04:38:17 +0000 (00:38 -0400)]
Fix: ext4: Linux 3.11 support
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Tue, 3 Sep 2013 04:16:58 +0000 (00:16 -0400)]
Fix: ext3: 3.11 Linux support
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Tue, 3 Sep 2013 04:12:34 +0000 (00:12 -0400)]
Fix: statedump nsproxy 3.11 Linux support
Follow upstream Linux change introduced by:
commit
c2b1df2eb42978073ec27c99cc199d20ae48b849
Author: Andy Lutomirski <luto@amacapital.net>
Date: Thu Aug 22 11:39:16 2013 -0700
Rename nsproxy.pid_ns to nsproxy.pid_ns_for_children
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Fri, 30 Aug 2013 18:41:31 +0000 (14:41 -0400)]
Version 2.3.0-rc2
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Mon, 26 Aug 2013 14:13:06 +0000 (10:13 -0400)]
Fix: metadata lttng channel refcount
The OOPS at bug #622 is likely caused by a missing reference on the
lttng channel structure, which could lead to accessing the object after
it has been destroyed if the lttng channel file descriptor is closed
while the metadata stream fd is still in use.
Fixes #622
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Acked-by: Julien Desfossez <jdesfossez@efficios.com>
Mathieu Desnoyers [Thu, 8 Aug 2013 13:15:44 +0000 (09:15 -0400)]
README: lttng-modules incompatible with lttng 0.x patchset
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Thu, 18 Jul 2013 01:37:26 +0000 (21:37 -0400)]
Version 2.3.0-rc1
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Thu, 18 Jul 2013 01:31:24 +0000 (21:31 -0400)]
Fix: kvm x86 probes side-effect
ccflags-y += -I$(kvm_path)
was causing the lttng-ftrace probe to misbehave.
Fixes #591
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Mon, 15 Jul 2013 15:26:06 +0000 (11:26 -0400)]
Fix: allow get/put subbuf in loop for metadata stream
data_pending check can trigger the following sequence:
- get_next_subbuf
- put_subbuf
- get_next_subbuf
- put_subbuf
- get_next_subbuf
- put_subbuf
...
and then finally a thread would consume the data:
- get_next_subbuf
- put_next_subbuf
However, we don't want to populate data from the metadata cache into the
stream until put_next_subbuf is issued. Add a check to ensure that it is
not populated until required.
Also, disallow get_subbuf() ioctl on metadata channel: its random-access
semantic does not play well with serialization of the metadata cache on
demand.
Reviewed-by: Julien Desfossez <jdesfossez@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mohamad Gebai [Mon, 8 Jul 2013 16:52:22 +0000 (12:52 -0400)]
Add support for kvm x86 specific tracepoints
Two new probes for kvm-x86 and kvm-x86-mmu.
Signed-off-by: Mohamad Gebai <mohamad.gebai@polymtl.ca>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mohamad Gebai [Mon, 8 Jul 2013 16:50:46 +0000 (12:50 -0400)]
Add mainline headers for kvm x86 tracepoints
Signed-off-by: Mohamad Gebai <mohamad.gebai@polymtl.ca>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Yannick Brosseau [Mon, 8 Jul 2013 16:46:32 +0000 (12:46 -0400)]
Remove old 3.0.4 x86-64 extracted syscall info
Signed-off-by: Yannick Brosseau <yannick.brosseau@gmail.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Yannick Brosseau [Mon, 8 Jul 2013 16:45:56 +0000 (12:45 -0400)]
Point the x86-64 overrides to newly extracted 3.10-rc7 files
Signed-off-by: Yannick Brosseau <yannick.brosseau@gmail.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Yannick Brosseau [Mon, 8 Jul 2013 16:44:57 +0000 (12:44 -0400)]
Add syscalls extracted files from a 3.10-rc7 kernel
This will add some previously unknown syscalls
Signed-off-by: Yannick Brosseau <yannick.brosseau@gmail.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Yannick Brosseau [Mon, 8 Jul 2013 16:44:11 +0000 (12:44 -0400)]
Improve documentation of the syscall extractor script
Signed-off-by: Yannick Brosseau <yannick.brosseau@gmail.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Fri, 5 Jul 2013 02:20:25 +0000 (22:20 -0400)]
Fix: double length of __dynamic_len array
This is required by the newly introduced __dynamic_array_enc_ext_2() and
tp_memcpy_dyn_2().
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Thu, 4 Jul 2013 19:46:20 +0000 (15:46 -0400)]
Fix printk instrumentation
- Don't require 2kB of stack anymore (requiring so much kernel stack
space should be considered as a bug in itself),
- Add support for 3.10 kernel printk instrumentation.
This patch uses "Introduce __dynamic_array_enc_ext_2() and
tp_memcpy_dyn_2()".
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Thu, 4 Jul 2013 19:45:20 +0000 (15:45 -0400)]
Introduce __dynamic_array_enc_ext_2() and tp_memcpy_dyn_2()
Allow copying into a single variable-length buffer from two sources.
Needed to fix printk support for Linux kernel < 3.5.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Wed, 3 Jul 2013 22:35:10 +0000 (18:35 -0400)]
Fix: ring buffer: get_subbuf() checks should be performed on "consumed" parameter
This triggers lots of false-positive -EAGAIN errors in flight recorder
snapshots.
Reported-by: Julien Desfossez <jdesfossez@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Mon, 1 Jul 2013 22:10:22 +0000 (18:10 -0400)]
Fix: SWITCH_FLUSH new sub-buffer checks
The SWITCH_FLUSH, when performed on a completely empty sub-buffer, was
missing some checks (imported from space reservation).
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Mon, 1 Jul 2013 21:01:56 +0000 (17:01 -0400)]
Fix: ring buffer: handle concurrent update in nested buffer wrap around check
With stress-test loads that trigger sub-buffer switch very frequently
(small 4kB sub-buffers, frequent flush), we currently observe this kind
of warnings once every few minutes:
[65335.896208] ring buffer relay-overwrite-mmap, cpu 5: records were lost. Caused by:
[65335.896208] [ 0 buffer full, 1 nest buffer wrap-around, 0 event too big ]
It appears that the check for nested buffer wrap-around does not take
into account that a concurrent execution contexts (either nested for
per-cpu buffers, or from another CPU or nested for global buffers) can
update the commit_count value concurrently.
What we really want to do with this check is to ensure that if we enter
a sub-buffer that had an unbalanced reserve/commit count, assuming there
is no hope that this gets rebalanced promptly, we detect this and drop
the current event. However, in the case where the commit counter has
been concurrently updated by another reserve or a switch, we want to
retry the entire reserve operation.
One way to detect this is to sample the reserve offset twice, around the
commit counter read, along with the appropriate memory barriers.
Therefore, we can detect if the mismatch between reserve and commit
counter is actually caused by a concurrent update, which necessarily has
updated the reserve counter.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Mon, 1 Jul 2013 17:23:11 +0000 (13:23 -0400)]
Cleanup: lib_ring_buffer_switch_new_end() only calls subbuffer_set_data_size()
lib_ring_buffer_switch_new_end() is always called when an event exactly
fills a sub-buffer, which makes padding_size always 0. However, there is
one side-effect that lib_ring_buffer_switch_new_end() needs to have: it
calls subbuffer_set_data_size() to update the size of the data to be
read from the sub-buffer.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Sun, 30 Jun 2013 22:49:13 +0000 (18:49 -0400)]
Revert "Cleanup: ring buffer: remove lib_ring_buffer_switch_new_end()"
This reverts commit
5fb66f07aae4884426f1706d0281bd242a38c2a7.
The equivalent UST commit of this change broke regression tests of
lttng-tools.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Sun, 30 Jun 2013 21:38:50 +0000 (17:38 -0400)]
Fix: handle writes of length 0
lib_ring_buffer_write(), lib_ring_buffer_memset() and
lib_ring_buffer_copy_from_user_inatomic() could be passed a length of 0.
This typically has no side-effect as far as writing into the buffers is
concerned, except for one detail: in overwrite mode, there is a check to
make sure the sub-buffer can be written into. This check is performed
even if length is 0. In the case where this would fall exactly at the
end of a sub-buffer, the check would fail, because the offset would fall
exactly at the beginning of the next sub-buffer.
It triggers this warning:
[65356.890016] ------------[ cut here ]------------
[65356.890016] WARNING: at /home/compudj/git/lttng-modules/wrapper/ringbuffer/../../lib/ringbuffer/../../wrapper/ringbuffer/../../lib/ringbuffer/backend.h:110 lttng_event_write+0x118/0x140 [lttng_ring_buffer_client_mmap_overwrite]()
[65356.890016] Hardware name: X7DAL
[65356.890016] Modules linked in: lttng_probe_writeback(O) lttng_probe_workqueue(O) lttng_probe_vmscan(O) lttng_probe_udp(O) lttng_probe_timer(O) lttng_probe_sunrpc(O) lttng_probe_statedump(O) lttng_probe_sock(O) lttng_probe_skb(O) lttng_probe_signal(O) lttng_probe_scsi(O) lttng_probe_sched(O) lttng_probe_rcu(O) lttng_probe_random(O) lttng_probe_printk(O) lttng_probe_power(O) lttng_probe_net(O) lttng_probe_napi(O) lttng_probe_module(O) lttng_probe_kvm(O) lttng_probe_kmem(O) lttng_probe_jbd2(O) lttng_probe_jbd(O) lttng_probe_irq(O) lttng_probe_ext4(O) lttng_probe_ext3(O) lttng_probe_compaction(O) lttng_probe_btrfs(O) lttng_probe_block(O) lttng_types(O) lttng_ring_buffer_metadata_mmap_client(O) lttng_ring_buffer_client_mmap_overwrite(O) lttng_ring_buffer_client_mmap_discard(O) lttng_ring_buffer_metadata_client(O) lttng_ring_buffer_client_overwrite(O) lttng_ring_buffer_client_discard(O) lttng_tracer(O) lttng_kretprobes(O) lttng_ftrace(O) lttng_kprobes(O) lttng_statedump(O) lttng_lib_ring_buffer(O) cpufreq_ondemand loop e1000e kvm_intel kvm ptp pps_core [last unloaded: lttng_lib_ring_buffer]
[65357.287529] Pid: 0, comm: swapper/7 Tainted: G O 3.9.4-trace-test #143
[65357.309694] Call Trace:
[65357.317022] <IRQ> [<
ffffffff8103a3ef>] warn_slowpath_common+0x7f/0xc0
[65357.336893] [<
ffffffff8103a44a>] warn_slowpath_null+0x1a/0x20
[65357.354368] [<
ffffffffa0ff17b8>] lttng_event_write+0x118/0x140 [lttng_ring_buffer_client_mmap_overwrite]
[65357.383025] [<
ffffffffa100134f>] __event_probe__block_rq_with_error+0x1bf/0x220 [lttng_probe_block]
[65357.410376] [<
ffffffff812ea134>] blk_update_request+0x324/0x720
[65357.428364] [<
ffffffff812ea561>] blk_update_bidi_request+0x31/0x90
[65357.447136] [<
ffffffff812eb68c>] blk_end_bidi_request+0x2c/0x80
[65357.465127] [<
ffffffff812eb6f0>] blk_end_request+0x10/0x20
[65357.481822] [<
ffffffff81406b7c>] scsi_io_completion+0x9c/0x670
[65357.499555] [<
ffffffff813fe320>] scsi_finish_command+0xb0/0xe0
[65357.517283] [<
ffffffff81406965>] scsi_softirq_done+0xa5/0x140
[65357.534758] [<
ffffffff812f1d30>] blk_done_softirq+0x80/0xa0
[65357.551710] [<
ffffffff81043b00>] __do_softirq+0xe0/0x440
[65357.567881] [<
ffffffff81043ffe>] irq_exit+0x9e/0xb0
[65357.582754] [<
ffffffff81026465>] smp_call_function_single_interrupt+0x35/0x40
[65357.604388] [<
ffffffff8167be2f>] call_function_single_interrupt+0x6f/0x80
[65357.624976] <EOI> [<
ffffffff8100ac06>] ? default_idle+0x46/0x300
[65357.643541] [<
ffffffff8100ac04>] ? default_idle+0x44/0x300
[65357.660235] [<
ffffffff8100b899>] cpu_idle+0x89/0xe0
[65357.675109] [<
ffffffff81664911>] start_secondary+0x220/0x227
Always from an event that can write a 0-length field as last field of
its payload, and it always happen directly on a sub-buffer boundary.
While we are there, check for length 0 in lib_ring_buffer_read_cstr()
too.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Sun, 30 Jun 2013 19:37:46 +0000 (15:37 -0400)]
Fix: ring buffer: RING_BUFFER_FLUSH ioctl buffer corruption
lib_ring_buffer_switch_slow() clearly states:
* Note, however, that as a v_cmpxchg is used for some atomic
* operations, this function must be called from the CPU which owns the
* buffer for a ACTIVE flush.
But unfortunately, the RING_BUFFER_FLUSH ioctl does not follow these
important directives. Therefore, whenever the consumer daemon or session
daemon explicitly triggers a "flush" on a buffer, it can race with data
being written to the buffer, leading to corruption of the reserve/commit
counters, and therefore corruption of data in the buffer. It triggers
these warnings for overwrite mode buffers:
[65356.890016] WARNING: at
/home/compudj/git/lttng-modules/wrapper/ringbuffer/../../lib/ringbuffer/../../wrapper/ringbuffer/../../lib/ringbuffer/backend.h:110 lttng_event_write+0x118/0x140 [lttng_ring_buffer_client_mmap_overwrite]()
Which indicates that we are trying to write into a sub-buffer for which
we don't have exclusive access. It also causes the following warnings to
show up:
[65335.896208] ring buffer relay-overwrite-mmap, cpu 5: records were lost. Caused by:
[65335.896208] [ 0 buffer full, 80910 nest buffer wrap-around, 0 event too big ]
Which is caused by corrupted commit counter.
Fix this by sending an IPI to the CPU owning the flushed buffer for
per-cpu synchronization. For global synchronization, no IPI is needed,
since we allow writes from remote CPUs.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Sun, 30 Jun 2013 19:27:21 +0000 (15:27 -0400)]
Cleanup: ring buffer: remove lib_ring_buffer_switch_new_end()
lib_ring_buffer_switch_new_end() is a leftover from the days where an
event that would exactly fill the current sub-buffer would automatically
trigger a sub-buffer switch into the next sub-buffer.
Even before the ring buffer code has been moved into lttng-modules, this
behavior had been changed: an event that exactly fills a sub-buffer only
fills this current sub-buffer, and does not need to switch into the
next one to populate the sub-buffer header. This change had been done so
periodical timer switch, which shares the same semantic as an event
exactly filling a sub-buffer, would not create tons of empty
sub-buffers.
However, when doing this change, lib_ring_buffer_switch_new_end() has
not been removed, but clearly should have been. Its job is now performed
by the event "commit".
lib_ring_buffer_switch_new_end() has no effect, since padding_size is
always 0.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Wed, 26 Jun 2013 23:42:52 +0000 (19:42 -0400)]
print warning and return -EBUSY on double get_subbuf()
Each get_subbuf() should be paired with a put_subbuf().
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Yannick Brosseau [Wed, 26 Jun 2013 19:18:10 +0000 (15:18 -0400)]
Add header to fix compilation of syscalls-extractor on 3.9 kernel
Signed-off-by: Yannick Brosseau <yannick.brosseau@gmail.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Wed, 26 Jun 2013 17:55:31 +0000 (13:55 -0400)]
Fix: don't do 0 byte event reservation
Caused sequence of:
lttng create
lttng enable-event -k sched_switch
lttng start
lttng stop
lttng start
lttng stop
to hang on waiting for data......
Issue appeared in
commit
d83004aa718065e5221d8ef4b99e4302b70b3df9
Author: Julien Desfossez <jdesfossez@efficios.com>
Date: Thu Jun 6 16:38:48 2013 -0400
Metadata cache and multiple metadata channels
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Wed, 26 Jun 2013 17:54:18 +0000 (13:54 -0400)]
Document that payload size need to be greater than 0
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Samuel Martin [Mon, 17 Jun 2013 14:28:51 +0000 (10:28 -0400)]
Fix build and load against linux-2.6.33.x
* lttng-event.h declared but did not implement
lttng_add_perf_counter_to_ctx on kernel >=2.6.33, the implementation
was in lttng-context-perf-counters.c, which was only included for
kernel >=2.6.34. This prevented the module from being loaded.
* on kernel 2.6.33.x, lttng-context-perf-counters.c complains about
implicit declaration for {get,put}_online_cpus and
{,un}register_cpu_notifier; so fix header inclusion.
Signed-off-by: Samuel Martin <smartin@aldebaran-robotics.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Thu, 6 Jun 2013 20:44:49 +0000 (16:44 -0400)]
Fix: add missing CONFIG_COMPAT around lib_ring_buffer_compat_ioctl
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Julien Desfossez [Thu, 6 Jun 2013 20:38:48 +0000 (16:38 -0400)]
Metadata cache and multiple metadata channels
Implement a cache for the kernel metadata and a list of metadata
channels.
When new metadata is appended, all metadata channels are awakened so
they can return from poll and get the newly added metadata
This allows to request the metadata multiple times by creating multiple
metadata channels (useful for snapshots).
With this new feature, the poll and get_subbuf ring buffer operations
are now overridden by lttng-abi for the metadata channels, to check the
cache before doing these operations.
Signed-off-by: Julien Desfossez <jdesfossez@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Thu, 6 Jun 2013 14:02:47 +0000 (10:02 -0400)]
fix block instrumentation probe signature mismatch for 3.9.x kernels
Was causing OOPS when tracing the block layer.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Thu, 6 Jun 2013 02:54:50 +0000 (22:54 -0400)]
fix: block instrumentation: NULL pointer dereference
This backtrace appears with kernel 3.9.4:
[19311.313455] BUG: unable to handle kernel NULL pointer dereference at (null)
[19311.316589] IP: [<
ffffffffa076392b>] __event_probe__block_bio+0x8b/0x1a0 [lttng_probe_block]
[19311.316589] PGD
41808a067 PUD
4190a3067 PMD 0
[19311.316589] Oops: 0000 [#1] PREEMPT SMP
[19311.316589] Modules linked in: lttng_probe_writeback(O) lttng_probe_workqueue(O) lttng_probe_vmscan(O) lttng_probe_udp(O) lm
[19311.316589] CPU 4
[19311.316589] Pid: 1423, comm: kjournald Tainted: G O 3.9.4-trace-test #143 Supermicro X7DAL/X7DAL
[19311.316589] RIP: 0010:[<
ffffffffa076392b>] [<
ffffffffa076392b>] __event_probe__block_bio+0x8b/0x1a0 [lttng_probe_block]
[19311.316589] RSP: 0018:
ffff88041c0d5aa8 EFLAGS:
00010246
[19311.316589] RAX:
0000000000000000 RBX:
ffff88041a994c00 RCX:
ffff88041b610800
[19311.316589] RDX:
0000000000000004 RSI:
ffff88041c0d5b00 RDI:
ffff88041c0d5ab0
[19311.316589] RBP:
ffff88041c0d5b18 R08:
fffffffffffc0000 R09:
0000000000000000
[19311.316589] R10:
ffff88041a9947e8 R11:
0000000000000001 R12:
ffff880419252c18
[19311.316589] R13:
ffff88041c9e0a48 R14:
ffff88041749bd10 R15:
ffff88041749bd20
[19311.316589] FS:
0000000000000000(0000) GS:
ffff88042fd00000(0000) knlGS:
0000000000000000
[19311.316589] CS: 0010 DS: 0000 ES: 0000 CR0:
000000008005003b
[19311.316589] CR2:
0000000000000000 CR3:
0000000417a0a000 CR4:
00000000000007e0
[19311.316589] DR0:
0000000000000000 DR1:
0000000000000000 DR2:
0000000000000000
[19311.316589] DR3:
0000000000000000 DR6:
00000000ffff0ff0 DR7:
0000000000000400
[19311.316589] Process kjournald (pid: 1423, threadinfo
ffff88041c0d4000, task
ffff88041daa0000)
[19311.316589] Stack:
[19311.316589]
0000000000000000 ffff88041c3e4000 ffff880408987518 0000000000000024
[19311.316589]
0000000400000001 ffff88042fd19e30 000000000000002a 00000000000126c1
[19311.316589]
00000000000126bb 0000119043fa4efc ffff880400000000 0000000000000246
[19311.316589] Call Trace:
[19311.316589] [<
ffffffff812e79fb>] bio_attempt_back_merge+0xfb/0x1e0
[19311.316589] [<
ffffffff812ec96f>] blk_queue_bio+0x43f/0x570
[19311.316589] [<
ffffffff812ea68a>] generic_make_request+0xca/0x100
[19311.316589] [<
ffffffff81495bfe>] raid1_unplug+0x12e/0x170
[19311.316589] [<
ffffffff812ec36c>] blk_flush_plug_list+0x9c/0x210
[19311.316589] [<
ffffffff812ec4f8>] blk_finish_plug+0x18/0x50
[19311.316589] [<
ffffffff81243a48>] journal_commit_transaction+0x728/0x1f30
[19311.316589] [<
ffffffff8104e463>] ? try_to_del_timer_sync+0x53/0x70
[19311.316589] [<
ffffffff8104e485>] ? del_timer_sync+0x5/0xd0
[19311.316589] [<
ffffffff8124967d>] kjournald+0xed/0x290
[19311.316589] [<
ffffffff8106a270>] ? __init_waitqueue_head+0x60/0x60
[19311.316589] [<
ffffffff81249590>] ? commit_timeout+0x10/0x10
[19311.316589] [<
ffffffff810695fb>] kthread+0xdb/0xe0
[19311.316589] [<
ffffffff81672c60>] ? _raw_spin_unlock_irq+0x30/0x60
[19311.316589] [<
ffffffff81069520>] ? __init_kthread_worker+0x70/0x70
[19311.316589] [<
ffffffff8167af1c>] ret_from_fork+0x7c/0xb0
[19311.316589] [<
ffffffff81069520>] ? __init_kthread_worker+0x70/0x70
Fixes #559
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Wed, 5 Jun 2013 21:56:03 +0000 (17:56 -0400)]
Update rcu instrumentation to 3.9.[0-4]
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Jan Glauber [Thu, 23 May 2013 11:35:16 +0000 (07:35 -0400)]
Fix CPU hotplug section mismatches
Get rid of the following section mismatches:
WARNING: /home/jang/temp/lttng-modules-2.2.0-r0/git/lttng-tracer.o(.text+0x19dc0): Section mismatch in reference from the function lttng_add_perf_counter_to_ctx() to the function .cpuinit.text:lttng_perf_counter_cpu_hp_callback()
The function lttng_add_perf_counter_to_ctx() references
the function __cpuinit lttng_perf_counter_cpu_hp_callback().
This is often because lttng_add_perf_counter_to_ctx lacks a __cpuinit
annotation or the annotation of lttng_perf_counter_cpu_hp_callback is wrong.
WARNING: /home/jang/temp/lttng-modules-2.2.0-r0/git/lib/lttng-lib-ring-buffer.o(.text+0x1204): Section mismatch in reference from the function channel_backend_init() to the function .cpuinit.text:lib_ring_buffer_cpu_hp_callback()
The function channel_backend_init() references
the function __cpuinit lib_ring_buffer_cpu_hp_callback().
This is often because channel_backend_init lacks a __cpuinit
annotation or the annotation of lib_ring_buffer_cpu_hp_callback is wrong.
WARNING: /home/jang/temp/lttng-modules-2.2.0-r0/git/lib/lttng-lib-ring-buffer.o(.text+0x269c): Section mismatch in reference from the function channel_create() to the function .cpuinit.text:lib_ring_buffer_cpu_hp_callback()
The function channel_create() references
the function __cpuinit lib_ring_buffer_cpu_hp_callback().
This is often because channel_create lacks a __cpuinit
annotation or the annotation of lib_ring_buffer_cpu_hp_callback is wrong.
WARNING: /home/jang/temp/lttng-modules-2.2.0-r0/git/lib/lttng-lib-ring-buffer.o(.text+0x4a1c): Section mismatch in reference from the function channel_iterator_init() to the function .cpuinit.text:channel_iterator_cpu_hotplug()
The function channel_iterator_init() references
the function __cpuinit channel_iterator_cpu_hotplug().
This is often because channel_iterator_init lacks a __cpuinit
annotation or the annotation of channel_iterator_cpu_hotplug is wrong.
Signed-off-by: Jan Glauber <jan.glauber@gmail.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Paul Woegerer [Mon, 13 May 2013 16:23:13 +0000 (12:23 -0400)]
Add system calls definitions for powerpc-32
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Jon Bernard [Mon, 13 May 2013 15:38:17 +0000 (11:38 -0400)]
Remove bashism in lttng-syscalls-generate-headers.sh
Options to echo are not portable. In particular, the 'echo -e' option is
implemented by some shells, including bash, to expand escape sequences.
However, dash is one of the other family of shells that instead expands
escape sequences by default.
The printf command is portable and much more reliable.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Jan Glauber [Fri, 10 May 2013 15:52:07 +0000 (11:52 -0400)]
Update ARM (32 bit) syscall tracepoints to 3.4
Update from 2.6.38 to 3.4. Added syscalls:
sys_acct
sys_swapon
sys_swapoff
sys_quotactl
sys_perf_event_open
sys_fanotify_init
sys_name_to_handle_at
sys_open_by_handle_at
sys_clock_adjtime
sys_syncfs
sys_sendmmsg
sys_setns
sys_process_vm_readv
sys_process_vm_writev
Signed-off-by: Jan Glauber <jan.glauber@gmail.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Thu, 9 May 2013 12:55:52 +0000 (08:55 -0400)]
Version 2.2.0-rc2
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Julien Desfossez [Wed, 8 May 2013 14:09:19 +0000 (10:09 -0400)]
Remove useless lttng_metadata probe
We don't use this event anymore since we write the metadata directly
into the ring buffer, no need for an external event. This probe was
the only one in the lttng-probe-lttng module, so we can get rid of
this module as well.
Signed-off-by: Julien Desfossez <jdesfossez@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Fri, 3 May 2013 13:02:43 +0000 (09:02 -0400)]
Fix: warning kvm_trace_exit_reason redefined for 3.9 kernel
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Mon, 29 Apr 2013 17:11:46 +0000 (13:11 -0400)]
Fix: 3.9.0 block layer instrumentation build
Linux upstream commit:
commit
0a82a8d132b26d438eb90b3ab35a7016e7227a1d
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date: Thu Apr 18 09:00:26 2013 -0700
Revert "block: add missing block_bio_complete() tracepoint"
Requires us to revert in lttng-modules too.
Fixes #512
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Thu, 25 Apr 2013 19:11:43 +0000 (15:11 -0400)]
Revert "Stop build if CONFIG_TRACEPOINTS is not set"
This reverts commit
699f9673466e1a6537ad23cc697b79660639f260.
It breaks make clean.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Samu Voutilainen [Mon, 22 Apr 2013 17:05:05 +0000 (13:05 -0400)]
Stop build if CONFIG_TRACEPOINTS is not set
Previously it just tries to compile with zero modules, which is
confusing if you thought you had configured everything correctly. Now it
throws an error which tells which went wrong.
Fixes #506
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Samu Voutilainen [Mon, 22 Apr 2013 17:03:52 +0000 (13:03 -0400)]
Add comments to endifs.
This should make it easier to read construction of the makefile.
Refs #506
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Wed, 10 Apr 2013 16:14:38 +0000 (12:14 -0400)]
Fix: remove ARM set_tls system call override
We'll need to find a better way to instrument ARM-specific system calls
located at a far offset from the standard systems calls. A 16MB
lttng-modules kernel module is really not acceptable.
Removing this instrumentation for now. sys_set_tls will appear as
sys_unknown.
Fixes #472
CC: Ryan Kyser <Ryan.Kyser@jci.com>
Ref: http://lists.lttng.org/pipermail/lttng-dev/2013-April/019990.html
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Wed, 10 Apr 2013 16:14:15 +0000 (12:14 -0400)]
Cleanup: arm sys_mmap whitespace
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Andrew Gabbasov [Tue, 2 Apr 2013 13:25:37 +0000 (09:25 -0400)]
Clean up using global_dirty_limit wrapper for writeback probe
Move the wrapper around reading of global_dirty_limit to /wrapper/
directory. Introduce a new kallsyms_lookup_dataptr function for
obtaining the address unchanged and use it in global_dirty_limit
wrapper. Since the data address is available only if
CONFIG_KALLSYMS_ALL is set, omit the whole probe from building if this
config is missing.
[ Edit by Mathieu Desnoyers: small coding style fixes ]
Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Sat, 30 Mar 2013 02:35:56 +0000 (22:35 -0400)]
Version 2.2.0-rc1
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Sat, 30 Mar 2013 02:32:13 +0000 (22:32 -0400)]
Update README
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Sat, 30 Mar 2013 02:12:42 +0000 (22:12 -0400)]
Fix: vmscan instrumentation build
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Sat, 30 Mar 2013 01:45:17 +0000 (21:45 -0400)]
writeback instrumentation: remove duplicated structures
Don't replicate internal structures from the kernel: this is asking for
serious trouble, and could lead to breakage if building on newer kernels
that have modified structures.
The proper approach, if we really need to extract this information,
would be to add APIs to the Linux kernel workqueue that allow getting
this information.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Sat, 30 Mar 2013 01:38:27 +0000 (21:38 -0400)]
block: update instrumentation to 3.9 rc kernel
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Sat, 30 Mar 2013 01:32:47 +0000 (21:32 -0400)]
rcu: update to 3.9 rc kernel instrumentation
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Sat, 30 Mar 2013 00:47:25 +0000 (20:47 -0400)]
workqueue instrumentation: remove duplicated structures
Don't replicate internal structures from the kernel: this is asking for
serious trouble, and could lead to breakage if building on newer kernels
that have modified structures.
The proper approach, if we really need to extract this information,
would be to add APIs to the Linux kernel workqueue that allow getting
this information.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Sat, 30 Mar 2013 00:39:34 +0000 (20:39 -0400)]
Rename odd event names
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Sat, 30 Mar 2013 00:38:18 +0000 (20:38 -0400)]
Introduce API to remap event names exposed by LTTng
Some kernel event providers don't follow naming hierarchy. Rename them
internally within LTTng.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Maxin B. John [Fri, 22 Mar 2013 13:56:13 +0000 (09:56 -0400)]
lttng-module: sched.h: Fix compilation on 3.9 kernel
With commit
8bd75c77b7c6a3954140dd2e20346aef3efe4a35
included in 3.9-rc1 kernel, rt specific bits in "linux/sched.h"
were moved into new header file "linux/sched/rt.h".
Fixes this compilation error:
CC [M] /home/majo/lttng/lttng-modules/probes/lttng-probe-sched.o
...
/home/majo/lttng/lttng-modules/probes/../instrumentation/events/lttng-module
/../../../probes/../instrumentation/events/lttng-module/sched.h:
In function '__event_probe__sched_switch':
/home/majo/lttng/lttng-modules/probes/../instrumentation/events/lttng-module
/../../../probes/../instrumentation/events/lttng-module/sched.h:164:1:
error: 'MAX_RT_PRIO' undeclared (first use in this function)
...
Signed-off-by: Maxin B. John <maxin.john@enea.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Wed, 13 Mar 2013 19:04:56 +0000 (15:04 -0400)]
Fix Linux 3.8 btrfs probe warning
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Wed, 13 Mar 2013 18:56:49 +0000 (14:56 -0400)]
Fix Linux 3.8 ext4 probe support
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Wed, 13 Mar 2013 17:49:13 +0000 (13:49 -0400)]
Fix 3.8 kernel support: namespace lttng_is_signed_type()
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Wed, 27 Feb 2013 21:48:56 +0000 (16:48 -0500)]
Fix: don't flush-final for offset 0 if reader is on sub-buffer
Triggers rare sub-buffer corruption when a buffer is completely full and
a final flush is then performed.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Fri, 22 Feb 2013 16:18:50 +0000 (11:18 -0500)]
instrumentation sched: add missing fork pid info
Fixes #434
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Simon Marchi [Wed, 6 Feb 2013 16:26:59 +0000 (11:26 -0500)]
Fix check in lttng_strlen_user_inatomic
__copy_from_user_inatomic returns the number of bytes that could not be
copied, not an error code. This fixes the test accordingly.
[ Edit by Mathieu Desnoyers: change "ret" type to unsigned long too. ]
Signed-off-by: Simon Marchi <simon.marchi@polymtl.ca>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Francis Giraldeau [Mon, 28 Jan 2013 16:21:43 +0000 (11:21 -0500)]
instrumentation: sync with Linux commit
a1ce392
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Fri, 25 Jan 2013 17:25:38 +0000 (12:25 -0500)]
Fix: statedump: missing locking, use lttng_iterate_fd
- Take a spinlock around use of dentry->d_name.name.
- Use lttng_iterate_fd wrapper (and thus iterate_fd() from Linux kernels
from v3.7 and onward).
Suggested-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Fri, 25 Jan 2013 17:24:57 +0000 (12:24 -0500)]
Implement lttng_iterate_fd wrapper
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Mon, 21 Jan 2013 19:00:41 +0000 (14:00 -0500)]
Instrumentation cleanup: kmem events should print hex pointers
Fixes #422
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Simon Marchi [Thu, 10 Jan 2013 23:12:27 +0000 (18:12 -0500)]
Fix compilation of ext4 and btrfs tracepoints on 2.6.40 kernels
See
f95480cf62e9acb42b74fce162544694b76c9704.
The new btrfs and ext4 tracepoints used 3.0.0 in the compilation logic.
Signed-off-by: Simon Marchi <simon.marchi@polymtl.ca>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Wed, 9 Jan 2013 17:40:55 +0000 (12:40 -0500)]
Fix: statedump hang/too early completion due to logic error
The previous "Fix: statedump hang due to incorrect wait/wakeup use" was
not actually fixing the real problem.
The issue is that we should pass the expected condition to wait_event()
rather than its contrary.
This bug has been sitting there for a while. I suspect that a recent
change in the Linux scheduler behavior for newly spawned worker threads
might have contributed to trigger the hang more reliably.
The effects of this bugs are:
- possible hang of the lttng-sessiond (within the kernel) at tracing
start,
- the statedump end event is traced before all worker threads have
actually completed, which can confuse LTTng viewer state systems.
Reported-by: Phil Wilshire <sysdcs@gmail.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Tue, 8 Jan 2013 19:27:05 +0000 (14:27 -0500)]
Fix: statedump hang due to incorrect wait/wakeup use
Reported-by: Phil Wilshire <sysdcs@gmail.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Corey Minyard [Wed, 12 Dec 2012 02:45:20 +0000 (21:45 -0500)]
put_ulong calls in lib_ring_buffer_compat_ioctl() should be compat
I was noticing the that some of the put_ulong calls in
lib_ring_buffer_compat_ioctl() were not compat_put_ulong. I can't
imagine this is correct.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Andrew Gabbasov [Mon, 10 Dec 2012 18:18:32 +0000 (13:18 -0500)]
wrapper/perf.h: Fix kernel version condition
The pid_t parameter of function perf_event_create_kernel_counter
was changed to task_struct pointer starting from 2.6.37.x.
Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Andrew Gabbasov [Mon, 10 Dec 2012 16:14:52 +0000 (11:14 -0500)]
Add new kernel probes instrumentation
Add kernel probes for btrfs, compaction, ext4, printk, random, rcu,
regmap, rpm, sunrpc, workqueue, writeback.
Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Andrew Gabbasov [Mon, 10 Dec 2012 16:12:14 +0000 (11:12 -0500)]
Update kernel probes to more detailed match to kernel versions
Some ifdef's are added to kernel probes instrumentation to make them
more close to original tracepoints in different kernel versions.
Supported kernel version are from 2.6.32 to 3.7.
Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Andrew Gabbasov [Mon, 10 Dec 2012 16:01:52 +0000 (11:01 -0500)]
Fix possible kernel build errors with linux-patches
Kernel sources of version 2.6.32 - 2.6.34 with applied patches
from linux-patches may fail to compile if tracepoint samples
are configured to build. Some part of backported commits
are added to the kernel patches to avoid those errors.
Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Wed, 5 Dec 2012 13:14:39 +0000 (08:14 -0500)]
Add missing MIT license text to 3 files under this license
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Andrew Gabbasov [Tue, 27 Nov 2012 16:44:17 +0000 (17:44 +0100)]
Update sites using kernel version checking macro to new range
Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Andrew Gabbasov [Tue, 27 Nov 2012 16:43:38 +0000 (17:43 +0100)]
Make upper bound of kernel version checking macro exclusive
It's more usable to have the upper limit exclusive. It helps to avoid
hardcoding of stable branch highest version number, i.e. having a range
from 3.1.0 up to 3.2.0 (exclusively) gives us all 3.1.x versions.
Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Andrew Gabbasov [Sun, 25 Nov 2012 21:13:16 +0000 (16:13 -0500)]
sock instrumentation: fix fields to get referenced values
Due to specific of passing values in lttng-modules, if it is supposed
to display the values, passing a pointer will not be enough,
we need to store the actual values.
Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Andrew Gabbasov [Sun, 25 Nov 2012 21:12:46 +0000 (16:12 -0500)]
ext3 instrumentation: fix of assignment code conversion
Due to specifics of handling assignment code in lttng-modules,
plain code in TP_fast_assign (outside tp_* macros) will not be reached.
Everything should be enclosed into tp_* fragments.
Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Andrew Gabbasov [Sun, 25 Nov 2012 21:12:18 +0000 (16:12 -0500)]
sched instrumentation: rename "pid" fields in sched_process_exec
Rename "pid" to "tid" fields in new code, similarly to what was
done earlier for all sched tracepoints.
Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Andrew Gabbasov [Sun, 25 Nov 2012 21:11:33 +0000 (16:11 -0500)]
Remove remaining semicolons in TP_fast_assign blocks
Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Simon Marchi [Fri, 23 Nov 2012 23:11:04 +0000 (18:11 -0500)]
Fix compilation for 3.0 kernels that are named 2.6.40
Since some distro released the 3.0 kernel as 2.6.40, it might be useful
to adjust some checks to treat 2.6.40 kernels as 3.0.
Signed-off-by: Simon Marchi <simon.marchi@polymtl.ca>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Simon Marchi [Fri, 23 Nov 2012 23:10:38 +0000 (18:10 -0500)]
Fix compilation for 3.0 branch (>= 3.0.39)
The isolate_mode_t type that appeared in 3.2 was backported to 3.0.39 so
the version check must be fixed. It was not backported to the 3.1 branch
though, so it must be excluded.
Signed-off-by: Simon Marchi <simon.marchi@polymtl.ca>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Fri, 23 Nov 2012 20:05:12 +0000 (15:05 -0500)]
Add kernel version checking macro
It contains a macro to help checking for kernel version ranges.
Signed-off-by: Simon Marchi <simon.marchi@polymtl.ca>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Paul Woegerer [Wed, 14 Nov 2012 16:04:46 +0000 (11:04 -0500)]
Remove semicolons in TP_fast_assign blocks
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Paul Woegerer [Wed, 14 Nov 2012 16:03:42 +0000 (11:03 -0500)]
Add ifdefs to net probe to support Linux 2.6.39
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Paul Woegerer [Wed, 14 Nov 2012 16:02:46 +0000 (11:02 -0500)]
Add kernel probes for supplementary subsystems
Add probes for: asoc, ext3, gpio, jbd, jbd2, kmem, lock, module, napi,
net, power, regulator, scsi, skb, sock, udp, vmscan subsystems.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Simon Marchi [Thu, 8 Nov 2012 20:17:54 +0000 (15:17 -0500)]
Check if interrupt action name is not null in statedump
Protection against poorly written drivers who give a null name to their
irq handlers.
Signed-off-by: Simon Marchi <simon.marchi@polymtl.ca>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Fri, 12 Oct 2012 21:01:25 +0000 (17:01 -0400)]
Fix exec instrumentation: only for kernels 3.4.0 and higher
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Paul Woegerer [Fri, 12 Oct 2012 14:19:42 +0000 (10:19 -0400)]
Add TRACE_EVENT(sched_process_exec) to sched.h
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Will Newton [Thu, 11 Oct 2012 16:51:15 +0000 (12:51 -0400)]
lib/ringbuffer/frontend_api.h: Include linux/prefetch.h.
prefetch() is used in this file so make sure we include the appropriate
header before using it.
Signed-off-by: Will Newton <will.newton@imgtec.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Wed, 3 Oct 2012 13:11:00 +0000 (09:11 -0400)]
Fix warning with 3.6.0 kernel
No actual runtime impact, but neater anyway.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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