From: NeilBrown <neilb@suse.de>
To: Andrew Morton <akpm@osdl.org>
Cc: linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org,
"Raz Ben-Jehuda(caro)" <raziebe@gmail.com>
Subject: [PATCH 006 of 6] md: Enable bypassing cache for reads.
Date: Tue, 31 Oct 2006 17:01:14 +1100 [thread overview]
Message-ID: <1061031060114.5111@suse.de> (raw)
In-Reply-To: 20061031164814.4884.patches@notabene
Call the chunk_aligned_read where appropriate.
cc: "Raz Ben-Jehuda(caro)" <raziebe@gmail.com>
Signed-off-by: Neil Brown <neilb@suse.de>
### Diffstat output
./drivers/md/raid5.c | 5 +++++
1 file changed, 5 insertions(+)
diff .prev/drivers/md/raid5.c ./drivers/md/raid5.c
--- .prev/drivers/md/raid5.c 2006-10-31 16:42:30.000000000 +1100
+++ ./drivers/md/raid5.c 2006-10-31 16:47:53.000000000 +1100
@@ -2798,6 +2798,11 @@ static int make_request(request_queue_t
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;
next prev parent reply other threads:[~2006-10-31 6:01 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-31 6:00 [PATCH 000 of 6] md: udev events and cache bypass for reads NeilBrown
2006-10-31 6:00 ` [PATCH 001 of 6] md: Send online/offline uevents when an md array starts/stops NeilBrown
2006-10-31 21:16 ` Greg KH
2006-11-02 12:13 ` Kay Sievers
2006-11-02 12:32 ` Neil Brown
2006-11-02 13:51 ` Kay Sievers
2006-11-03 6:57 ` Neil Brown
2006-11-03 8:22 ` Kay Sievers
2006-11-06 0:18 ` Neil Brown
2006-11-06 8:38 ` dean gaudet
2006-11-07 5:05 ` Neil Brown
2006-11-09 10:10 ` Michael Tokarev
2006-11-09 10:17 ` Michael Tokarev
2006-11-08 11:14 ` Kay Sievers
2006-11-09 0:17 ` Neil Brown
2006-10-31 6:00 ` [PATCH 002 of 6] md: Change lifetime rules for 'md' devices NeilBrown
2006-10-31 8:22 ` Andrew Morton
2006-10-31 9:09 ` Neil Brown
2006-10-31 9:15 ` Jens Axboe
2006-10-31 9:26 ` Neil Brown
2006-10-31 9:30 ` Jens Axboe
2006-10-31 6:00 ` [PATCH 003 of 6] md: Define raid5_mergeable_bvec NeilBrown
2006-10-31 6:01 ` [PATCH 004 of 6] md: Handle bypassing the read cache (assuming nothing fails) NeilBrown
2006-10-31 6:01 ` [PATCH 005 of 6] md: Allow reads that have bypassed the cache to be retried on failure NeilBrown
2006-10-31 6:01 ` NeilBrown [this message]
2006-10-31 21:15 ` [PATCH 000 of 6] md: udev events and cache bypass for reads Greg KH
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