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Go Back   Linux Archive > Redhat > Device-mapper Development

 
 
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Old 08-25-2010, 03:47 PM
Tejun Heo
 
Default block, fs: replace HARDBARRIER with FLUSH/FUA

Hello,

This patchset is combination of the following three patchset.

[1] block: replace barrier with sequenced flush
[2] block: convert to REQ_FLUSH/FUA
[3] replace barriers with explicit flush / FUA usage

Changes from the previous postings are,

* Rebased on top of 2.6.36-rc2 (502adf5778f4151dcba3f64dd6ed322151f3712c)

* Acked/Reviewed-by's added.

* ide-remove-unnecessary-blk_queue_flushing-test-in-do_ide_request
patch added which removes blk_queue_flushing().

* BH flags, which are no longer necessary on 2.6.36-rc2, are dropped
from fs-block-propagate-REQ_FLUSH-FUA-interface-to-upper-layers and
the patch is collapsed into
block-implement-REQ_FLUSH-FUA-based-interface-for-FLUSH-FUA-requests.

* block-filter-flush-bio-s-in-__generic_make_request added. This
makes sure make_request based drivers which don't implement cache
flushes don't see REQ_FLUSH/FUA requests.

* block-simplify-queue_next_fseq added.

* REQ_FUA support dropped from virtio/lguest conversion as suggested
by Christoph.

* md conversion updated as suggested by Neil Brown.

* dm conversion is excluded for now.

* block-remove-the-BLKDEV_IFL_BARRIER-flag patch now also removes
DISCARD_SECURE.

* block-remove-the-write-barrier-flag patch excluded for now (pending
on dm conversion).

I've audited all make_request drivers and after this patchset only
blktrace, dm, drbd and xen need more work. I'll work on blktrace and
dm but leave xen and drbd for the respective maintainers.

Build tested w/ allmodconfig and lightly tested w/ ext4 and xfs.

This patchst contains the following thirty patches.

0001-ide-remove-unnecessary-blk_queue_flushing-test-in-do.patch
0002-block-loop-queue-ordered-mode-should-be-DRAIN_FLUSH.patch
0003-block-kill-QUEUE_ORDERED_BY_TAG.patch
0004-block-deprecate-barrier-and-replace-blk_queue_ordere.patch
0005-block-remove-spurious-uses-of-REQ_HARDBARRIER.patch
0006-block-misc-cleanups-in-barrier-code.patch
0007-block-drop-barrier-ordering-by-queue-draining.patch
0008-block-rename-blk-barrier.c-to-blk-flush.c.patch
0009-block-rename-barrier-ordered-to-flush.patch
0010-block-implement-REQ_FLUSH-FUA-based-interface-for-FL.patch
0011-block-filter-flush-bio-s-in-__generic_make_request.patch
0012-block-use-REQ_FLUSH-in-blkdev_issue_flush.patch
0013-block-simplify-queue_next_fseq.patch
0014-block-loop-implement-REQ_FLUSH-FUA-support.patch
0015-virtio_blk-drop-REQ_HARDBARRIER-support.patch
0016-lguest-replace-VIRTIO_F_BARRIER-support-with-VIRTIO_.patch
0017-md-implment-REQ_FLUSH-FUA-support.patch
0018-block-pass-gfp_mask-and-flags-to-sb_issue_discard.patch
0019-xfs-replace-barriers-with-explicit-flush-FUA-usage.patch
0020-btrfs-replace-barriers-with-explicit-flush-FUA-usage.patch
0021-gfs2-replace-barriers-with-explicit-flush-FUA-usage.patch
0022-reiserfs-replace-barriers-with-explicit-flush-FUA-us.patch
0023-nilfs2-replace-barriers-with-explicit-flush-FUA-usag.patch
0024-jbd-replace-barriers-with-explicit-flush-FUA-usage.patch
0025-jbd2-replace-barriers-with-explicit-flush-FUA-usage.patch
0026-ext4-do-not-send-discards-as-barriers.patch
0027-fat-do-not-send-discards-as-barriers.patch
0028-swap-do-not-send-discards-as-barriers.patch
0029-block-remove-the-BLKDEV_IFL_BARRIER-flag.patch
0030-block-remove-the-BH_Eopnotsupp-flag.patch

and available in the following git tree.

git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc.git flush-fua

and contain the following changes.

Documentation/lguest/lguest.c | 29 --
block/Makefile | 2
block/blk-barrier.c | 350 ------------------------------------
block/blk-core.c | 68 +++---
block/blk-flush.c | 242 ++++++++++++++++++++++++
block/blk-lib.c | 18 -
block/blk-settings.c | 20 ++
block/blk.h | 8
block/elevator.c | 79 --------
drivers/block/brd.c | 1
drivers/block/loop.c | 20 +-
drivers/block/osdblk.c | 5
drivers/block/pktcdvd.c | 1
drivers/block/ps3disk.c | 2
drivers/block/virtio_blk.c | 37 ---
drivers/block/xen-blkfront.c | 47 +---
drivers/ide/ide-disk.c | 13 -
drivers/ide/ide-io.c | 13 -
drivers/md/dm.c | 2
drivers/md/linear.c | 4
drivers/md/md.c | 117 ++----------
drivers/md/md.h | 23 --
drivers/md/multipath.c | 4
drivers/md/raid0.c | 4
drivers/md/raid1.c | 175 ++++++------------
drivers/md/raid1.h | 2
drivers/md/raid10.c | 7
drivers/md/raid5.c | 43 ++--
drivers/md/raid5.h | 1
drivers/mmc/card/queue.c | 1
drivers/s390/block/dasd.c | 1
drivers/scsi/aic7xxx_old.c | 21 --
drivers/scsi/libsas/sas_scsi_host.c | 13 -
drivers/scsi/sd.c | 18 -
fs/btrfs/disk-io.c | 19 -
fs/btrfs/extent-tree.c | 2
fs/btrfs/volumes.c | 4
fs/btrfs/volumes.h | 1
fs/buffer.c | 7
fs/ext4/mballoc.c | 3
fs/fat/fatent.c | 4
fs/fat/misc.c | 5
fs/gfs2/log.c | 19 -
fs/gfs2/rgrp.c | 5
fs/jbd/commit.c | 30 ---
fs/jbd2/commit.c | 43 ----
fs/nilfs2/super.c | 10 -
fs/nilfs2/the_nilfs.c | 7
fs/reiserfs/journal.c | 106 ++--------
fs/xfs/linux-2.6/xfs_buf.c | 16 -
fs/xfs/linux-2.6/xfs_buf.h | 11 -
fs/xfs/linux-2.6/xfs_trace.h | 1
fs/xfs/xfs_log.c | 13 -
include/linux/blk_types.h | 4
include/linux/blkdev.h | 85 +-------
include/linux/buffer_head.h | 2
include/linux/fs.h | 27 +-
include/scsi/scsi_tcq.h | 6
mm/swapfile.c | 9
59 files changed, 585 insertions(+), 1245 deletions(-)

Thanks.

--
tejun

[1] http://thread.gmane.org/gmane.linux.kernel/1022363
[2] http://thread.gmane.org/gmane.linux.raid/29100
[3] http://thread.gmane.org/gmane.linux.file-systems/44957

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