mm: Use owner_priv bit for PageSwapCache, valid when PageSwapBacked

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A page is not added to the swap cache without being swap backed,
so PageSwapBacked mappings can use PG_owner_priv_1 for PageSwapCache.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Bob Peterson <rpeterso@redhat.com>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Andrew Lutomirski <luto@kernel.org>
Cc: Andreas Gruenbacher <agruenba@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

...

This commit is contained in:

Nicholas Piggin 2016-12-25 13:00:29 +10:00 • committed by Linus Torvalds

parent 7c0f6ba682

commit 6326fec112

4 changed files with 25 additions and 18 deletions

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24

include/linux/page-flags.h

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1

include/trace/events/mmflags.h

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4

mm/memory-failure.c

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14

mm/migrate.c

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