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From: "Bryan O'Sullivan" <bos@serpentine.com>
To: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Andreas Pfaller <apfaller@yahoo.com.au>,
	Alan Cox <alan@lxorguk.ukuu.org.uk>,
	lkml <linux-kernel@vger.kernel.org>
Subject: Re: linux-2.4.20-pre8-ac3: NFS performance regression
Date: 03 Oct 2002 16:40:40 -0700	[thread overview]
Message-ID: <1033688440.7341.20.camel@plokta.s8.com> (raw)
In-Reply-To: <shsu1k316jn.fsf@charged.uio.no>

On Thu, 2002-10-03 at 15:50, Trond Myklebust wrote:

> FYI, here is the 'fix' Alan is talking about. It could be worth
> trying...

Trond -

I'd seen a similar problem under 2.4.19 with your NFS-ALL patch
applied.  The client would lock up for periods of up to several minutes
at a time without generating any traffic, then would wake up and
retransmit.  This would continue for a few seconds (rarely more than 30
seconds of uninterrupted IO) before another huge pause-and-retransmit
cycle began.

Your patch restores client performance to sane levels.  It applies
cleanly against 2.4.19 with NFS-ALL.  I suggest you republish NFS-ALL
with this patch applied, in case other people who are stuck with 2.4.19
run into this problem.

Thanks,

	<b

      parent reply	other threads:[~2002-10-03 23:35 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-10-03 18:32 Andreas Pfaller
2002-10-03 22:13 ` Alan Cox
2002-10-03 22:50   ` Trond Myklebust
2002-10-03 23:15     ` Andreas Pfaller
2002-10-03 23:40     ` Bryan O'Sullivan [this message]

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