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Message-ID: <20051108201847.89115.qmail@web34112.mail.mud.yahoo.com>
Date: Tue, 8 Nov 2005 12:18:47 -0800 (PST)
From: Kenny Simpson <theonetruekenny@yahoo.com>
Subject: re: mmap over nfs leads to excessive system load
To: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: linux-kernel@vger.kernel.org
In-Reply-To: <1131480107.32482.48.camel@lade.trondhjem.org>
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I knew I forgoet something important in the info:
  type nfs (rw,tcp,rsize=32768,wsize=32768,hard,intr,vers=3,tcp,rsize=32768,wsize=32768,hard,intr

-Kenny


--- Trond Myklebust <trond.myklebust@fys.uio.no> wrote:

> On Tue, 2005-11-08 at 11:25 -0800, Kenny Simpson wrote:
> > Just another data point....
> > If I open the file with O_DIRECT.. not much changes:
> 
> Hmm... Are you mounting using the -osync or -onoac options? Doing
> synchronous writes will tend to slow down flushing considerably, and the
> VM appears to be very fragile w.r.t. slow filesystems.
> 
> Cheers,
>   Trond


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