linux-kernel - Re: high latency NFS

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Message-ID: <52873.192.168.1.70.1217813385.squirrel@neil.brown.name>
Date:	Mon, 4 Aug 2008 11:29:45 +1000 (EST)
From:	"NeilBrown" <neilb@...e.de>
To:	"J. Bruce Fields" <bfields@...ldses.org>,
	"Neil Brown" <neilb@...e.de>, "Michael Shuey" <shuey@...due.edu>,
	"Shehjar Tikoo" <shehjart@....unsw.edu.au>,
	linux-kernel@...r.kernel.org, linux-nfs@...r.kernel.org,
	rees@...i.umich.edu, aglo@...i.umich.edu
Cc:	"Greg Banks" <gnb@...bourne.sgi.com>
Subject: Re: high latency NFS

On Mon, August 4, 2008 10:32 am, Dave Chinner wrote:
> On Fri, Aug 01, 2008 at 03:15:59PM -0400, J. Bruce Fields wrote:
>> On Fri, Aug 01, 2008 at 05:23:20PM +1000, Dave Chinner wrote:

>> > i.e. take the solution that Greg banks used for the CPU scheduler
>> > overload issue (limiting the number of nfsds woken but not yet on
>> > the CPU),
>>
>> I don't remember that, or wasn't watching when it happened.... Do you
>> have a pointer?
>
> Ah, I thought that had been sent to mainline because it was
> mentioned in his LCA talk at the start of the year. Slides
> 65-67 here:
>
> http://mirror.linux.org.au/pub/linux.conf.au/2007/video/talks/41.pdf

Ahh... I remembered Greg talking about that, went looking, and
couldn't find it.  I couldn't even find any mail about it, yet I'm
sure I saw a patch..

Greg: Do you remember what happened to this?  Did I reject it for some
reason, or did it never get sent?  or ...

NeilBrown

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