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| author | NeilBrown <neilb@suse.de> | 2009-07-01 13:15:35 +1000 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2009-07-01 13:15:35 +1000 |
| commit | a5c308d4d1659b1f4833b863394e3e24cdbdfc6e (patch) | |
| tree | 6affde6f3f03c01f651210cc042a07ba70533d03 | |
| parent | 0909dc448c98ed5021c87ffdfc09fb473aa464ab (diff) | |
| download | kernel_samsung_crespo-a5c308d4d1659b1f4833b863394e3e24cdbdfc6e.zip kernel_samsung_crespo-a5c308d4d1659b1f4833b863394e3e24cdbdfc6e.tar.gz kernel_samsung_crespo-a5c308d4d1659b1f4833b863394e3e24cdbdfc6e.tar.bz2 | |
md/raid5: suspend shouldn't affect read requests.
md allows write to regions on an array to be suspended temporarily.
This allows user-space to participate is aspects of reshape.
In particular, data can be copied with not risk of a race.
We should not be blocking read requests though, so don't.
Cc: stable@kernel.org
Signed-off-by: NeilBrown <neilb@suse.de>
| -rw-r--r-- | drivers/md/raid5.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 92ef9b6..1f444ae 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -3702,7 +3702,8 @@ static int make_request(struct request_queue *q, struct bio * bi) /* FIXME what if we get a false positive because these * are being updated. */ - if (logical_sector >= mddev->suspend_lo && + if (bio_data_dir(bi) == WRITE && + logical_sector >= mddev->suspend_lo && logical_sector < mddev->suspend_hi) { release_stripe(sh); schedule(); |