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| author | Roman Gushchin <guro@fb.com> | 2018-04-10 16:27:40 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-04-11 10:28:29 -0700 |
| commit | 034ebf65c3c21d85b963d39f992258a64a85e3a9 (patch) | |
| tree | 205f96f2b6bfd8a8e814d6b9737a0f774987a143 /mm/page_alloc.c | |
| parent | eb59254608bc1d42c4c6afdcdce9c0d3ce02b318 (diff) | |
| download | lwn-034ebf65c3c21d85b963d39f992258a64a85e3a9.tar.gz lwn-034ebf65c3c21d85b963d39f992258a64a85e3a9.zip | |
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.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>
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 0b97b8ece4a9..b04667848375 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -4734,6 +4734,13 @@ 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; |