From: Andi Kleen <andi@firstfloor.org>
To: Frank Mayhar <fmayhar@google.com>
Cc: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, mrubin@google.com
Subject: Re: Results of my VFS scaling evaluation.
Date: Sun, 10 Oct 2010 08:50:49 +0200 [thread overview]
Message-ID: <8739seh77a.fsf@basil.nowhere.org> (raw)
In-Reply-To: <1286580739.3153.57.camel@bobble.smo.corp.google.com> (Frank Mayhar's message of "Fri, 08 Oct 2010 16:32:19 -0700")
Frank Mayhar <fmayhar@google.com> writes:
> Nick Piggin has been doing work on lock contention in VFS, in particular
> to remove the dcache and inode locks, and we are very interested in this
> work. He has entirely eliminated two of the most contended locks,
> replacing them with a combination of more granular locking, seqlocks,
> RCU lists and other mechanisms that reduce locking and contention in
> general. He has published this work at
>
> git://git.kernel.org/pub/scm/linux/kernel/git/npiggin/linux-npiggin.git
>
> As we have run into problems with lock contention, Google is very
> interested in these improvements.
Thanks Frank for the data. Yes publication of any profiles would
be interesting. We're also seeing major issues with dcache and
inode locks in local testing.
-Andi
--
ak@linux.intel.com -- Speaking for myself only.
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next prev parent reply other threads:[~2010-10-10 6:50 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-08 23:32 Frank Mayhar
2010-10-09 0:33 ` Frank Mayhar
2010-10-09 0:38 ` Valerie Aurora
2010-10-11 18:47 ` Frank Mayhar
2011-01-13 11:13 ` Nick Piggin
2010-10-09 3:16 ` Dave Chinner
2010-10-10 6:54 ` Andi Kleen
2010-10-10 7:37 ` Christoph Hellwig
2010-10-10 8:20 ` Andi Kleen
2010-10-10 8:37 ` Christoph Hellwig
2010-10-10 12:03 ` Andi Kleen
2010-10-10 23:50 ` Dave Chinner
2010-10-10 23:31 ` Dave Chinner
2010-10-10 6:50 ` Andi Kleen [this message]
2010-10-19 21:59 ` Results of my VFS scaling evaluation, redux Frank Mayhar
2010-10-19 22:03 ` Frank Mayhar
2010-10-22 19:03 ` VFS scaling evaluation results, redux Frank Mayhar
2010-10-23 0:00 ` Lin Ming
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