linux-kernel - Re: [PATCH] sunrpc: use better NUMA affinities

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Message-ID: <20110730160610.0b751ffd@notabene.brown>
Date:	Sat, 30 Jul 2011 16:06:10 +1000
From:	NeilBrown <neilb@...e.de>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	"J. Bruce Fields" <bfields@...ldses.org>,
	Greg Banks <gnb@...tmail.fm>,
	Christoph Hellwig <hch@...radead.org>,
	"linux-nfs@...r.kernel.org" <linux-nfs@...r.kernel.org>,
	David Miller <davem@...emloft.net>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH] sunrpc: use better NUMA affinities

On Sat, 30 Jul 2011 06:08:34 +0200 Eric Dumazet <eric.dumazet@...il.com>
wrote:

> Le vendredi 29 juillet 2011 à 19:48 -0400, J. Bruce Fields a écrit :
> > On Sat, Jul 30, 2011 at 09:30:25AM +1000, NeilBrown wrote:
> > > 
> > > rpc.nfsd 0
> > > 
> > > will stop all nfsd threads.  Follow with
> > > 
> > >   exportfs -f
> > > 
> > > and you should be done.  I'm not 100% sure about the nfsv4 thread though -
> > > would need to check.
> > 
> > Should be fine.
> > 
> 
> What are the needed steps to be able to unload nfsd module ?
> 
> So far, I am unable to perform this without using -f option.
> 
> 
> 
> 

Kill all nfsd threads.
   This can be done with 'kill' or 'rpc.nfsd 0' or
     echo 0 > /proc/fs/nfsd/threads

kill mountd
   killall rpc.mountd

kill idmapd

unexport everything.
   This can be done with 'exportfs -f' and checked by
    grep . /proc/net/rpc/*/content
   this should only contain comments

unmount the 'nfsd' filesystem
   umount /proc/fs/nfsd

rmmod nfsd


(it look me ages to remember idmapd - but 
   lsof /proc/net/rpc/*/*
 gave it away)

NeilBrown
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