bcache: Change refill_dirty() to always scan entire disk if necessary

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[ Upstream commit 627ccd20b4 ]

Previously, it would only scan the entire disk if it was starting from
the very start of the disk - i.e. if the previous scan got to the end.

This was broken by refill_full_stripes(), which updates last_scanned so
that refill_dirty was never triggering the searched_from_start path.

But if we change refill_dirty() to always scan the entire disk if
necessary, regardless of what last_scanned was, the code gets cleaner
and we fix that bug too.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

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Kent Overstreet 2015-11-29 18:47:01 -08:00 • committed by Sasha Levin

parent ad148665b5

commit ebd138117e

1 changed files with 30 additions and 7 deletions

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drivers/md/bcache/writeback.c

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