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mm: treat indirectly reclaimable memory as available in MemAvailable

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Adjust /proc/meminfo MemAvailable calculation by adding the amount of
indirectly reclaimable memory (rounded to the PAGE_SIZE).

Link: http://lkml.kernel.org/r/20180305133743.12746-4-guro@fb.com
Signed-off-by: Roman Gushchin <guro@fb.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Git-Commit: 034ebf65c3c21d85b963d39f992258a64a85e3a9
Git-Repo: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
Change-Id: I32547afd6ffa8c7979aa1d5978a7b9aef84aff4a
Signed-off-by: Vijayanand Jitta <vjitta@codeaurora.org>
This commit is contained in:
Roman Gushchin 2018-04-10 16:27:40 -07:00 committed by Vijayanand Jitta
parent fd82bbcb2b
commit d680316d79
1 changed files with 7 additions and 0 deletions
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7
mm/page_alloc.c
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@ -4558,6 +4558,13 @@ long si_mem_available(void)
min(global_node_page_state(NR_SLAB_RECLAIMABLE) / 2,
wmark_low);
/*
* Part of the kernel memory, which can be released under memory
* pressure.
*/
available += global_node_page_state(NR_INDIRECTLY_RECLAIMABLE_BYTES) >>
PAGE_SHIFT;
if (available < 0)
available = 0;
return available;