From: Jens Axboe <jens.axboe@oracle.com>
To: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>
Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
chris.mason@oracle.com, david@fromorbit.com, hch@infradead.org,
akpm@linux-foundation.org, jack@suse.cz, richard@rsk.demon.co.uk,
damien.wyart@free.fr, dedekind1@gmail.com, fweisbec@gmail.com
Subject: Re: [PATCH 0/15] Per-bdi writeback flusher threads v10
Date: Fri, 19 Jun 2009 07:01:13 +0200 [thread overview]
Message-ID: <20090619050113.GD11363@kernel.dk> (raw)
In-Reply-To: <1245386680.2560.416.camel@ymzhang>
On Fri, Jun 19 2009, Zhang, Yanmin wrote:
> > > > Sorry I should have made that more clear when posting v11. This patch
> > > > wont fully solve the problem, however the v11 patch series should. So if
> > > > you test with that, hopefully all soft hangs should be gone.
> > > Ok. I will start new testing against V11. I also add some debugging codes into
> > > V11.
> >
> > Great, thanks! There's a small issue with v11 that you should be aware
> > of. The test for bdi_add_default_flusher_task() was inverted. I'm
> > attaching a diff at the end. The interesting bit is the 2nd hunk of
> > backing-dev.c, the others are just a cleanup.
> Jens,
>
> I did entensive testing with fio (especially the aio randread which triggers
> the hang)/ffsb and a couple of other testing and didn't hit the hang issue.
> So V11 does fix the issue.
Great!
> From performance point of view, there is no big difference than old versions.
That's fine too, it's only been bug fixes the last few revisions. I'll
tag a v12 with the small fix.
--
Jens Axboe
next prev parent reply other threads:[~2009-06-19 5:01 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-12 12:54 [PATCH 0/15] Per-bdi writeback flusher threads v10 Jens Axboe
2009-06-12 12:54 ` [PATCH 01/15] block: don't overwrite bdi->state after bdi_init() has been run Jens Axboe
2009-06-12 12:54 ` [PATCH 02/15] btrfs: properly register fs backing device Jens Axboe
2009-06-12 12:54 ` [PATCH 03/15] ubifs: register backing_dev_info Jens Axboe
2009-06-12 12:54 ` [PATCH 04/15] writeback: move dirty inodes from super_block to backing_dev_info Jens Axboe
2009-06-12 12:54 ` [PATCH 05/15] writeback: switch to per-bdi threads for flushing data Jens Axboe
2009-06-12 12:54 ` [PATCH 06/15] writeback: get rid of pdflush completely Jens Axboe
2009-06-12 12:54 ` [PATCH 07/15] writeback: separate the flushing state/task from the bdi Jens Axboe
2009-06-12 12:54 ` [PATCH 08/15] writeback: support > 1 flusher thread per bdi Jens Axboe
2009-06-12 12:54 ` [PATCH 09/15] writeback: allow sleepy exit of default writeback task Jens Axboe
2009-06-12 12:54 ` [PATCH 10/15] writeback: add some debug inode list counters to bdi stats Jens Axboe
2009-06-12 12:54 ` [PATCH 11/15] writeback: add name to backing_dev_info Jens Axboe
2009-06-12 12:54 ` [PATCH 12/15] writeback: check for registered bdi in flusher add and inode dirty Jens Axboe
2009-06-12 12:54 ` [PATCH 13/15] writeback: restart bdi list scan on allocation failure Jens Axboe
2009-06-12 12:54 ` [PATCH 14/15] writeback: convert bdi_lock to a spinlock Jens Axboe
2009-06-12 12:54 ` [PATCH 15/15] writeback: use spin_trylock() in bdi_writeback_all() for WB_SYNC_NONE Jens Axboe
2009-06-16 1:06 ` [PATCH 0/15] Per-bdi writeback flusher threads v10 Zhang, Yanmin
2009-06-16 8:00 ` Jens Axboe
2009-06-16 19:53 ` Jens Axboe
2009-06-18 1:01 ` Zhang, Yanmin
2009-06-18 5:13 ` Jens Axboe
2009-06-18 5:19 ` Zhang, Yanmin
2009-06-18 12:35 ` Jens Axboe
2009-06-19 4:44 ` Zhang, Yanmin
2009-06-19 5:01 ` Jens Axboe [this message]
2009-06-17 1:35 ` Zhang, Yanmin
2009-06-17 4:21 ` Jens Axboe
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