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 009 of 9] md: Enable bypassing cache for reads.
Date: Wed, 8 Nov 2006 09:10:07 +1100 [thread overview]
Message-ID: <1061107221007.12586@suse.de> (raw)
In-Reply-To: 20061108085917.12064.patches@notabene
From: "Raz Ben-Jehuda(caro)" <raziebe@gmail.com>
Call the chunk_aligned_read where appropriate.
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 2006-11-06 11:29:14.000000000 +1100
+++ ./drivers/md/raid5.c 2006-11-06 11:29:14.000000000 +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;
WARNING: multiple messages have this Message-ID (diff)
From: NeilBrown <neilb@suse.de>
To: Andrew Morton <akpm@osdl.org>
Cc: linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: "Raz Ben-Jehuda(caro)" <raziebe@gmail.com>
Subject: [PATCH 009 of 9] md: Enable bypassing cache for reads.
Date: Wed, 8 Nov 2006 09:10:07 +1100 [thread overview]
Message-ID: <1061107221007.12586@suse.de> (raw)
In-Reply-To: 20061108085917.12064.patches@notabene
From: "Raz Ben-Jehuda(caro)" <raziebe@gmail.com>
Call the chunk_aligned_read where appropriate.
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 2006-11-06 11:29:14.000000000 +1100
+++ ./drivers/md/raid5.c 2006-11-06 11:29:14.000000000 +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:[~2006-11-07 22:10 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-07 22:09 [PATCH 000 of 9] md: udev notification, raid5 read improvements etc NeilBrown
2006-11-07 22:09 ` [PATCH 001 of 9] md: Change ONLINE/OFFLINE events to a single CHANGE event NeilBrown
2006-11-07 22:09 ` NeilBrown
2006-11-07 22:09 ` [PATCH 002 of 9] md: Fix sizing problem with raid5-reshape and CONFIG_LBD=n NeilBrown
2006-11-07 22:09 ` [PATCH 003 of 9] md: Do not freeze md threads for suspend NeilBrown
2006-11-07 22:09 ` NeilBrown
2006-11-07 22:09 ` [PATCH 004 of 9] md: Tidy up device-change notification when an md array is stopped NeilBrown
2006-11-07 22:09 ` [PATCH 005 of 9] md: Change lifetime rules for 'md' devices NeilBrown
2006-11-07 22:09 ` [PATCH 006 of 9] md: Define raid5_mergeable_bvec NeilBrown
2006-11-07 22:09 ` NeilBrown
2006-11-07 22:09 ` [PATCH 007 of 9] md: Handle bypassing the read cache (assuming nothing fails) NeilBrown
2006-11-07 22:09 ` NeilBrown
2006-11-07 22:10 ` [PATCH 008 of 9] md: Allow reads that have bypassed the cache to be retried on failure NeilBrown
2006-11-07 22:10 ` NeilBrown
2006-11-07 22:10 ` NeilBrown [this message]
2006-11-07 22:10 ` [PATCH 009 of 9] md: Enable bypassing cache for reads NeilBrown
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