md/raid10: Don't skip more than 1 bitmap-chunk at a time during recovery.

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When doing recovery on a raid10 with a write-intent bitmap, we only
need to recovery chunks that are flagged in the bitmap.

However if we choose to skip a chunk as it isn't flag, the code
currently skips the whole raid10-chunk, thus it might not recovery
some blocks that need recovering.

This patch fixes it.

In case that is confusing, it might help to understand that there
is a 'raid10 chunk size' which guides how data is distributed across
the devices, and a 'bitmap chunk size' which says how much data
corresponds to a single bit in the bitmap.

This bug only affects cases where the bitmap chunk size is smaller
than the raid10 chunk size.



Cc: stable@kernel.org
Signed-off-by: NeilBrown <neilb@suse.de>

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This commit is contained in:

NeilBrown 2009-02-25 13:18:47 +11:00

parent 2ec77fc93c

commit 09b4068a7f

1 changed files with 4 additions and 4 deletions

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drivers/md/raid10.c

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