[PATCH 006 of 6] md: Enable bypassing cache for reads.

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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;

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 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: 33+ 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 ` 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  6:00   ` 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  6:00   ` 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  6:00   ` 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   ` 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
2006-10-31  6:01 ` NeilBrown [this message]
2006-10-31  6:01   ` [PATCH 006 of 6] md: Enable bypassing cache for reads NeilBrown
2006-10-31 21:15 ` [PATCH 000 of 6] md: udev events and cache bypass " Greg KH

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