The patch titled
md: enable bypassing cache for reads
has been added to the -mm tree. Its filename is
md-enable-bypassing-cache-for-reads.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: md: enable bypassing cache for reads
From: "Raz Ben-Jehuda(caro)" <raziebe@xxxxxxxxx>
Call the chunk_aligned_read where appropriate.
Signed-off-by: Neil Brown <neilb@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/md/raid5.c | 5 +++++
1 files changed, 5 insertions(+)
diff -puN drivers/md/raid5.c~md-enable-bypassing-cache-for-reads drivers/md/raid5.c
--- a/drivers/md/raid5.c~md-enable-bypassing-cache-for-reads
+++ a/drivers/md/raid5.c
@@ -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;
_
Patches currently in -mm which might be from raziebe@xxxxxxxxx are
md-define-raid5_mergeable_bvec.patch
md-handle-bypassing-the-read-cache-assuming-nothing-fails.patch
md-allow-reads-that-have-bypassed-the-cache-to-be-retried-on-failure.patch
md-allow-reads-that-have-bypassed-the-cache-to-be-retried-on-failure-fix.patch
md-enable-bypassing-cache-for-reads.patch
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