Commit 034ebf65 authored by Roman Gushchin's avatar Roman Gushchin Committed by Linus Torvalds

mm: treat indirectly reclaimable memory as available in MemAvailable

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.comSigned-off-by: default avatarRoman Gushchin <guro@fb.com>
Reviewed-by: default avatarAndrew 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: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent eb592546
...@@ -4734,6 +4734,13 @@ long si_mem_available(void) ...@@ -4734,6 +4734,13 @@ long si_mem_available(void)
min(global_node_page_state(NR_SLAB_RECLAIMABLE) / 2, min(global_node_page_state(NR_SLAB_RECLAIMABLE) / 2,
wmark_low); 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) if (available < 0)
available = 0; available = 0;
return available; return available;
......
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