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mm: memcontrol: clarify migration where old page is uncharged
authorJohannes Weiner <hannes@cmpxchg.org>
Wed, 10 Dec 2014 23:43:46 +0000 (15:43 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 11 Dec 2014 01:41:06 +0000 (17:41 -0800)
commit7d5e324573b0ffd7098ab880c82096ca29a11f7f
tree9847999e2b1efcab0a72425adff3d5b85d2947adtree | snapshot (tar.gz zip)
parentdfe0e773d0258a4d7dfd763e1fda04aa27680b90commit | diff
mm: memcontrol: clarify migration where old page is uncharged

Better explain re-entrant migration when compaction races with reclaim,
and also mention swapcache readahead pages as possible uncharged migration
sources.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Hugh Dickins <hughd@google.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/memcontrol.c diff | blob | blame | history