Re: [PATCH 26/30] ext4: do not send discards as barriers

[PATCHSET 2.6.36-rc2] block, fs: replace HARDBARRIER with FLUSH/FUA · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 01/30] ide: remove unnecessary blk_queue_flushing() test in do_ide_request() · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 02/30] block/loop: queue ordered mode should be DRAIN_FLUSH · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 03/30] block: kill QUEUE_ORDERED_BY_TAG · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 04/30] block: deprecate barrier and replace blk_queue_ordered() with blk_queue_flush() · Tejun Heo <tj@kernel.org> · 2010-08-25
Re: [PATCH 04/30] block: deprecate barrier and replace blk_queue_ordered() with blk_queue_flush() · Boaz Harrosh <hidden> · 2010-08-30
[PATCH 05/30] block: remove spurious uses of REQ_HARDBARRIER · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 06/30] block: misc cleanups in barrier code · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 07/30] block: drop barrier ordering by queue draining · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 08/30] block: rename blk-barrier.c to blk-flush.c · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 09/30] block: rename barrier/ordered to flush · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 10/30] block: implement REQ_FLUSH/FUA based interface for FLUSH/FUA requests · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 11/30] block: filter flush bio's in __generic_make_request() · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 12/30] block: use REQ_FLUSH in blkdev_issue_flush() · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 13/30] block: simplify queue_next_fseq · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 14/30] block/loop: implement REQ_FLUSH/FUA support · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 15/30] virtio_blk: drop REQ_HARDBARRIER support · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 17/30] md: implment REQ_FLUSH/FUA support · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 20/30] btrfs: replace barriers with explicit flush / FUA usage · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 21/30] gfs2: replace barriers with explicit flush / FUA usage · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 22/30] reiserfs: replace barriers with explicit flush / FUA usage · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 23/30] nilfs2: replace barriers with explicit flush / FUA usage · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 24/30] jbd: replace barriers with explicit flush / FUA usage · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 25/30] jbd2: replace barriers with explicit flush / FUA usage · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 26/30] ext4: do not send discards as barriers · Tejun Heo <tj@kernel.org> · 2010-08-25
Re: [PATCH 26/30] ext4: do not send discards as barriers · Christoph Hellwig <hch@lst.de> · 2010-08-25
Re: [PATCH 26/30] ext4: do not send discards as barriers · Christoph Hellwig <hch@lst.de> · 2010-08-25
Re: [PATCH 26/30] ext4: do not send discards as barriers · Tejun Heo <tj@kernel.org> · 2010-08-25
Re: [PATCH 26/30] ext4: do not send discards as barriers · Jan Kara <jack@suse.cz> · 2010-08-25
Re: [PATCH 26/30] ext4: do not send discards as barriers · Tejun Heo <tj@kernel.org> · 2010-08-26
Re: [PATCH 26/30] ext4: do not send discards as barriers · Jan Kara <jack@suse.cz> · 2010-08-27
[PATCH 27/30] fat: do not send discards as barriers · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 29/30] block: remove the BLKDEV_IFL_BARRIER flag · Tejun Heo <tj@kernel.org> · 2010-08-25
Re: [PATCH 29/30] block: remove the BLKDEV_IFL_BARRIER flag · Christoph Hellwig <hch@lst.de> · 2010-08-25
[PATCH 30/30] block: remove the BH_Eopnotsupp flag · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 28/30] swap: do not send discards as barriers · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 18/30] block: pass gfp_mask and flags to sb_issue_discard · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 19/30] xfs: replace barriers with explicit flush / FUA usage · Tejun Heo <tj@kernel.org> · 2010-08-25
[PATCH 16/30] lguest: replace VIRTIO_F_BARRIER support with VIRTIO_F_FLUSH support · Tejun Heo <tj@kernel.org> · 2010-08-25
Re: [PATCHSET 2.6.36-rc2] block, fs: replace HARDBARRIER with FLUSH/FUA · Mike Snitzer <hidden> · 2010-08-25
[PATCH 24.5/30] jbd2: Modify ASYNC_COMMIT code to not rely on queue draining on barrier · Tejun Heo <hidden> · 2010-08-26
Re: [PATCH 24.5/30] jbd2: Modify ASYNC_COMMIT code to not rely on queue draining on barrier · Sergei Shtylyov <hidden> · 2010-08-26
[PATCH UPDATED 24.5/30] jbd2: Modify ASYNC_COMMIT code to not rely on queue draining on barrier · Tejun Heo <hidden> · 2010-08-26
Re: [PATCH 24.5/30] jbd2: Modify ASYNC_COMMIT code to not rely on queue draining on barrier · Andreas Dilger <hidden> · 2010-09-06
Re: [PATCH 24.5/30] jbd2: Modify ASYNC_COMMIT code to not rely on queue draining on barrier · Jan Kara <jack@suse.cz> · 2010-09-06
[PATCH] block: update documentation for REQ_FLUSH / REQ_FUA · Christoph Hellwig <hch@lst.de> · 2010-08-26
Re: [PATCH] block: update documentation for REQ_FLUSH / REQ_FUA · Tejun Heo <tj@kernel.org> · 2010-08-27

From: Christoph Hellwig <hch@lst.de>
Date: 2010-08-25 16:00:32
Also in: dm-devel, linux-fsdevel, linux-raid, linux-scsi, lkml

On Wed, Aug 25, 2010 at 05:58:42PM +0200, Christoph Hellwig wrote:

On Wed, Aug 25, 2010 at 05:47:43PM +0200, Tejun Heo wrote:

quoted

From: Christoph Hellwig <hch@infradead.org>

ext4 already uses synchronous discards, no need to add I/O barriers.

This needs the patch that Jan sent in reply to my initial version merged
into it.

Actually the jbd2 patch needs it merged, but the point still stands.

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