From: Michael Jeanson <mjeanson@efficios.com>
Date: Tue, 21 May 2019 20:33:13 +0000 (-0400)
Subject: fix: mm: move recent_rotated pages calculation to shrink_inactive_list() (v5.2)
X-Git-Tag: v2.12.0-pre~46
X-Git-Url: http://git.liburcu.org/?a=commitdiff_plain;h=f98bc8fbefdf009ab80e0e8eb5d1a3c6b4a642a3;hp=f98bc8fbefdf009ab80e0e8eb5d1a3c6b4a642a3;p=lttng-modules.git

fix: mm: move recent_rotated pages calculation to shrink_inactive_list() (v5.2)

See upstream commit:

  commit 886cf1901db962cee5f8b82b9b260079a5e8a4eb
  Author: Kirill Tkhai <ktkhai@virtuozzo.com>
  Date:   Mon May 13 17:16:51 2019 -0700

    mm: move recent_rotated pages calculation to shrink_inactive_list()

    Patch series "mm: Generalize putback functions"]

    putback_inactive_pages() and move_active_pages_to_lru() are almost
    similar, so this patchset merges them ina single function.

    This patch (of 4):

    The patch moves the calculation from putback_inactive_pages() to
    shrink_inactive_list().  This makes putback_inactive_pages() looking more
    similar to move_active_pages_to_lru().

    To do that, we account activated pages in reclaim_stat::nr_activate.
    Since a page may change its LRU type from anon to file cache inside
    shrink_page_list() (see ClearPageSwapBacked()), we have to account pages
    for the both types.  So, nr_activate becomes an array.

    Previously we used nr_activate to account PGACTIVATE events, but now we
    account them into pgactivate variable (since they are about number of
    pages in general, not about sum of hpage_nr_pages).

Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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