From: Neil Brown <neilb@suse.de>
Subject: Re: NFS directio
Date: Tue, 11 Apr 2006 10:12:11 +1000
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Cc: Olaf Kirch <okir@suse.de>,
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To: cel@citi.umich.edu
In-Reply-To: message from Chuck Lever on Monday April 10
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On Monday April 10, cel@citi.umich.edu wrote:
> Neil Brown wrote:
> > I think the case in point was a DVD burner trying to burn an image
> > that lived on a NFS filesystem.  It tried to direct-read a reasonable
> > fraction of the whole dvd (100Meg?) and had problems.
> 
> wow.  first i've heard of this.  was it ever reported to nfs@sf.net?

No, it was an internal suse thing, and as Olaf said, it was only 32Meg.

> 
> if you are sure that the problems were directly related to the pagevec 
> size logic, then i will get this fixed asap in mainline.

The old 16Meg limit (now gone in mainline, or -mm at least) was the
problem.  I don't know that kmalloc failure has actually been a
problem, but when I see a high-order kmalloc, I get all worried.

So I think it is a "should be fixed sometime", but not necessarily a
"must be fixed now" issue.

Thanks,
NeilBrown



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