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Message-ID: <20051121184032.80469.qmail@web34101.mail.mud.yahoo.com>
Date: Mon, 21 Nov 2005 10:40:31 -0800 (PST)
From: Kenny Simpson <theonetruekenny@yahoo.com>
Subject: Re: infinite loop? with mmap, nfs, pwrite, O_DIRECT
To: cel@citi.umich.edu
Cc: Andrew Morton <akpm@osdl.org>, trond.myklebust@fys.uio.no,
       linux-kernel@vger.kernel.org
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--- Chuck Lever <cel@citi.umich.edu> wrote:
> kenny-
> 
> i'm assuming that because you copied trond, this is only reproducible on 
> NFS.  have you tried this test on other local and remote file system types?

Yes, this only applies to NFS.
ext3 doesn't let you use pwrite with O_DIRECT, nor does NFS from 2.6.8.
These are the only 2 filesystem types to which I have access.

For ext3, using ftruncate works just fine for extending the file, but on NFS, ftruncate causes the
non-existent pages to be read in.

-Kenny


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