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: NeilBrown <neilb@xxxxxxx>
Call the chunk_aligned_read where appropriate.
Cc: "Raz Ben-Jehuda(caro)" <raziebe@xxxxxxxxx>
Signed-off-by: Neil Brown <neilb@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/md/raid5.c | 5 +++++
1 file 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 neilb@xxxxxxx are
md-check-bio-address-after-mapping-through-partitions.patch
md-send-online-offline-uevents-when-an-md-array-starts-stops.patch
sunrpc-add-missing-spin_unlock.patch
lockdep-annotate-nfs-nfsd-in-kernel-sockets.patch
lockdep-annotate-nfs-nfsd-in-kernel-sockets-tidy.patch
remove-lock_key-approach-to-managing-nested-bd_mutex-locks.patch
simplify-some-aspects-of-bd_mutex-nesting.patch
use-mutex_lock_nested-for-bd_mutex-to-avoid-lockdep-warning.patch
avoid-lockdep-warning-in-md.patch
lockdep-annotate-nfsd4-recover-code.patch
md-change-lifetime-rules-for-md-devices.patch
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-enable-bypassing-cache-for-reads.patch
md-conditionalize-some-code.patch
md-dm-reduce-stack-usage-with-stacked-block-devices.patch
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