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authorRoman Gushchin <guro@fb.com>2018-04-11 02:27:40 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2018-04-11 20:28:29 +0300
commit034ebf65c3c21d85b963d39f992258a64a85e3a9 (patch)
tree205f96f2b6bfd8a8e814d6b9737a0f774987a143 /mm/page_alloc.c
parenteb59254608bc1d42c4c6afdcdce9c0d3ce02b318 (diff)
downloadlinux-034ebf65c3c21d85b963d39f992258a64a85e3a9.tar.xz
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.c7
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;