Commit a5c308d4 authored Jul 01, 2009 by NeilBrown

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>

parent 0909dc44

drivers/md/raid5.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -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();

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