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authorRaz Ben-Jehuda(caro) <raziebe@gmail.com>2006-12-10 02:20:48 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-10 09:57:20 -0800
commit5248861511d6aae4997a5aa7152824d87587b0b6 (patch)
treea853392a6ca8fdb10a308e46b90e4ed63e66bf04 /drivers/md
parent46031f9a38a9773021f1872abc713d62467ac22e (diff)
downloadop-kernel-dev-5248861511d6aae4997a5aa7152824d87587b0b6.zip
op-kernel-dev-5248861511d6aae4997a5aa7152824d87587b0b6.tar.gz
[PATCH] md: enable bypassing cache for reads
Call the chunk_aligned_read where appropriate. Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/raid5.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 2ac2e56..2e676e3 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -2808,6 +2808,11 @@ static int make_request(request_queue_t *q, struct bio * bi)
disk_stat_inc(mddev->gendisk, ios[rw]);
disk_stat_add(mddev->gendisk, sectors[rw], bio_sectors(bi));
+ if (bio_data_dir(bi) == READ &&
+ mddev->reshape_position == MaxSector &&
+ chunk_aligned_read(q,bi))
+ return 0;
+
logical_sector = bi->bi_sector & ~((sector_t)STRIPE_SECTORS-1);
last_sector = bi->bi_sector + (bi->bi_size>>9);
bi->bi_next = NULL;
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