From: Trond Myklebust <Trond.Myklebust@netapp.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Wu Fengguang <fengguang.wu@intel.com>, Jan Kara <jack@suse.cz>,
Steve Rago <sar@nec-labs.com>,
"linux-nfs@vger.kernel.org" <linux-nfs@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"jens.axboe" <jens.axboe@oracle.com>,
Peter Staubach <staubach@redhat.com>,
Arjan van de Ven <arjan@infradead.org>,
Ingo Molnar <mingo@elte.hu>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>
Subject: Re: [PATCH] improve the performance of large sequential write NFS workloads
Date: Wed, 06 Jan 2010 13:52:07 -0500 [thread overview]
Message-ID: <1262803927.4251.133.camel@localhost> (raw)
In-Reply-To: <1262803040.4049.62.camel@laptop>
On Wed, 2010-01-06 at 19:37 +0100, Peter Zijlstra wrote:
> On Wed, 2010-01-06 at 13:26 -0500, Trond Myklebust wrote:
> > OK. It looks as if the only key to finding out how many unstable writes
> > we have is to use global_page_state(NR_UNSTABLE_NFS), so we can't
> > specifically target our own backing-dev.
>
> Would be a simple matter of splitting BDI_UNSTABLE out from
> BDI_RECLAIMABLE, no?
>
> Something like
OK. How about if we also add in a bdi->capabilities flag to tell that we
might have BDI_UNSTABLE? That would allow us to avoid the potentially
expensive extra calls to bdi_stat() and bdi_stat_sum() for the non-nfs
case?
Cheers
Trond
next prev parent reply other threads:[~2010-01-06 18:52 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-17 2:03 [PATCH] improve the performance of large sequential write NFS workloads Steve Rago
2009-12-17 8:17 ` Peter Zijlstra
2009-12-18 19:33 ` Steve Rago
2009-12-18 19:41 ` Ingo Molnar
2009-12-18 21:20 ` Steve Rago
2009-12-18 22:07 ` Ingo Molnar
2009-12-18 22:46 ` Steve Rago
2009-12-19 8:08 ` Arjan van de Ven
2009-12-19 13:37 ` Steve Rago
2009-12-18 19:44 ` Peter Zijlstra
2009-12-19 12:20 ` Wu Fengguang
2009-12-19 14:25 ` Steve Rago
2009-12-22 1:59 ` Wu Fengguang
2009-12-22 12:35 ` Jan Kara
2009-12-23 8:43 ` Christoph Hellwig
2009-12-23 13:32 ` Jan Kara
2009-12-24 5:25 ` Wu Fengguang
2009-12-24 1:26 ` Wu Fengguang
2009-12-22 13:01 ` Martin Knoblauch
2009-12-24 1:46 ` Wu Fengguang
2009-12-22 16:41 ` Steve Rago
2009-12-24 1:21 ` Wu Fengguang
2009-12-24 14:49 ` Steve Rago
2009-12-25 7:37 ` Wu Fengguang
2009-12-23 14:21 ` Trond Myklebust
2009-12-23 18:05 ` Jan Kara
2009-12-23 19:12 ` Trond Myklebust
2009-12-24 2:52 ` Wu Fengguang
2009-12-24 12:04 ` Trond Myklebust
2009-12-25 5:56 ` Wu Fengguang
2009-12-30 16:22 ` Trond Myklebust
2009-12-31 5:04 ` Wu Fengguang
2009-12-31 19:13 ` Trond Myklebust
2010-01-06 3:03 ` Wu Fengguang
2010-01-06 16:56 ` Trond Myklebust
2010-01-06 18:26 ` Trond Myklebust
2010-01-06 18:37 ` Peter Zijlstra
2010-01-06 18:52 ` Trond Myklebust [this message]
2010-01-06 19:07 ` Peter Zijlstra
2010-01-06 19:21 ` Trond Myklebust
2010-01-06 19:53 ` Trond Myklebust
2010-01-06 20:09 ` Jan Kara
2009-12-22 12:25 ` Jan Kara
2009-12-22 12:38 ` Peter Zijlstra
2009-12-22 12:55 ` Jan Kara
2009-12-22 16:20 ` Steve Rago
2009-12-23 18:39 ` Jan Kara
2009-12-23 20:16 ` Steve Rago
2009-12-23 21:49 ` Trond Myklebust
2009-12-23 23:13 ` Steve Rago
2009-12-23 23:44 ` Trond Myklebust
2009-12-24 4:30 ` Steve Rago
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