tree b0e9a47dee4929026faac9d46ab69e4b2b03d522
parent b06bad17c7435b600a1d7a35b56eff25e1d3dbc0
author Minchan Kim <minchan@kernel.org> 1461885524 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1461897244 -0700

mm/hwpoison: fix wrong num_poisoned_pages accounting

Currently, migration code increses num_poisoned_pages on *failed*
migration page as well as successfully migrated one at the trial of
memory-failure.  It will make the stat wrong.  As well, it marks the
page as PG_HWPoison even if the migration trial failed.  It would mean
we cannot recover the corrupted page using memory-failure facility.

This patches fixes it.

Signed-off-by: Minchan Kim <minchan@kernel.org>
Reported-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>