From: Dave Chinner <david@fromorbit.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: xfs@oss.sgi.com
Subject: Re: [PATCH 1/3] xfs: introduce an allocation workqueue
Date: Tue, 19 Jul 2011 13:14:29 +1000 [thread overview]
Message-ID: <20110719031429.GM30254@dastard> (raw)
In-Reply-To: <20110719020214.GB4259@infradead.org>
On Mon, Jul 18, 2011 at 10:02:14PM -0400, Christoph Hellwig wrote:
> On Tue, Jul 19, 2011 at 11:24:50AM +1000, Dave Chinner wrote:
> > Honestly, I'd prefer not to do that because it's a slippery slope.
> > I've got plenty more "do stuff in the background via workqueues"
> > patches lined up, so if we start adding knobs/mount options to turn
> > each of them off "just in case there's an issue".
> >
> > So far I haven't found any issues at all and I've been running this
> > split allocation stack like this in -all- my performance testing for
> > the past 2-3 months. I know that is not conclusive, but if the
> > bechmarks I've been using to improve XFS performance over the past
> > 18 months don't show regressions, that's fairly indicative of the
> > fact that most workloads won't even notice the change....
>
> Maybe. One thing I'd like to see is stuff like high-iop direct or
> O_SYNC I/O that actually calls the allocator.
What do you want me to run? I don't have any particularly high IOP
hardware here, but I might be able to do something that just hits
the BBWC....
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
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next prev parent reply other threads:[~2011-07-19 3:14 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-18 3:49 [PATCH 0/3] xfs: convert more code to use workqueues Dave Chinner
2011-07-18 3:49 ` [PATCH 1/3] xfs: introduce an allocation workqueue Dave Chinner
2011-07-18 16:00 ` Christoph Hellwig
2011-07-19 1:24 ` Dave Chinner
2011-07-19 2:02 ` Christoph Hellwig
2011-07-19 3:14 ` Dave Chinner [this message]
2011-07-18 3:49 ` [PATCH 2/3] xfs: convert xfsbufd to use a workqueue Dave Chinner
2011-07-18 16:01 ` Christoph Hellwig
2011-07-19 1:25 ` Dave Chinner
2011-07-18 3:49 ` [PATCH 3/3] xfs: flush the CIL via " Dave Chinner
2011-07-19 2:03 ` Christoph Hellwig
2011-07-19 3:05 ` Dave Chinner
2011-07-19 3:11 ` Christoph Hellwig
2011-07-19 4:28 ` Dave Chinner
2011-11-30 9:52 ` Christoph Hellwig
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