Mike Snitzer ed8b752bcc dm table: set flush capability based on underlying devices ...

DM has always advertised both REQ_FLUSH and REQ_FUA flush capabilities
regardless of whether or not a given DM device's underlying devices
also advertised a need for them.

Block's flush-merge changes from 2.6.39 have proven to be more costly
for DM devices.  Performance regressions have been reported even when
DM's underlying devices do not advertise that they have a write cache.

Fix the performance regressions by configuring a DM device's flushing
capabilities based on those of the underlying devices' capabilities.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

2011-08-02 12:32:08 +01:00

..

bitmap.c

MD bitmap: Revert DM dirty log hooks

2011-07-27 11:00:37 +10:00

bitmap.h

MD bitmap: Revert DM dirty log hooks

2011-07-27 11:00:37 +10:00

dm-bio-record.h

…

dm-crypt.c

dm crypt: optionally support discard requests

2011-08-02 12:32:08 +01:00

dm-delay.c

…

dm-exception-store.c

…

dm-exception-store.h

…

dm-flakey.c

dm flakey: add corrupt_bio_byte feature

2011-08-02 12:32:06 +01:00

dm-io.c

dm io: flush cpu cache with vmapped io

2011-08-02 12:32:01 +01:00

dm-ioctl.c

dm ioctl: forbid multiple device specifiers

2011-08-02 12:32:06 +01:00

dm-kcopyd.c

dm snapshot: skip reading origin when overwriting complete chunk

2011-08-02 12:32:04 +01:00

dm-linear.c

…

dm-log-userspace-base.c

dm log: userspace use list_move

2011-08-02 12:32:02 +01:00

dm-log-userspace-transfer.c

…

dm-log-userspace-transfer.h

…

dm-log.c

dm: use vzalloc

2011-08-02 12:32:02 +01:00

dm-mpath.c

dm table: share target argument parsing functions

2011-08-02 12:32:04 +01:00

dm-mpath.h

…

dm-path-selector.c

…

dm-path-selector.h

…

dm-queue-length.c

atomic: use <linux/atomic.h>

2011-07-26 16:49:47 -07:00

dm-raid1.c

…

dm-raid.c

dm raid: add md raid1 support

2011-08-02 12:32:07 +01:00

dm-region-hash.c

…

dm-round-robin.c

…

dm-service-time.c

…

dm-snap-persistent.c

dm snapshot: style cleanups

2011-08-02 12:32:03 +01:00

dm-snap-transient.c

…

dm-snap.c

dm snapshot: skip reading origin when overwriting complete chunk

2011-08-02 12:32:04 +01:00

dm-stripe.c

…

dm-sysfs.c

…

dm-table.c

dm table: set flush capability based on underlying devices

2011-08-02 12:32:08 +01:00

dm-target.c

…

dm-uevent.c

…

dm-uevent.h

…

dm-zero.c

…

dm.c

dm table: set flush capability based on underlying devices

2011-08-02 12:32:08 +01:00

dm.h

dm: ignore merge_bvec for snapshots when safe

2011-08-02 12:32:04 +01:00

faulty.c

…

Kconfig

dm raid: support metadata devices

2011-08-02 12:32:07 +01:00

linear.c

…

linear.h

…

Makefile

…

md.c

Merge branch 'for-linus' of git://neil.brown.name/md

2011-07-28 05:50:27 -07:00

md.h

md: make it easier to wait for bad blocks to be acknowledged.

2011-07-28 11:31:48 +10:00

multipath.c

…

multipath.h

…

raid0.c

…

raid0.h

…

raid1.c

md/raid1: factor several functions out or raid1d()

2011-07-28 11:38:13 +10:00

raid1.h

md/raid1: Handle write errors by updating badblock log.

2011-07-28 11:32:41 +10:00

raid5.c

md/raid5: Clear bad blocks on successful write.

2011-07-28 11:39:23 +10:00

raid5.h

md/raid5: Clear bad blocks on successful write.

2011-07-28 11:39:23 +10:00

raid10.c

md/raid10: handle further errors during fix_read_error better.

2011-07-28 11:39:25 +10:00

raid10.h

md/raid10: Handle write errors by updating badblock log.

2011-07-28 11:39:24 +10:00