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

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Date:	Sun, 28 Aug 2011 12:02:24 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	"J. Bruce Fields" <bfields@...ldses.org>
Cc:	NeilBrown <neilb@...e.de>, 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

Le vendredi 26 août 2011 à 20:02 -0400, J. Bruce Fields a écrit :
> On Sun, Jul 31, 2011 at 08:58:54AM +0200, Eric Dumazet wrote:
> > Le samedi 30 juillet 2011 à 08:23 +0200, Eric Dumazet a écrit :
> > > Le samedi 30 juillet 2011 à 16:06 +1000, NeilBrown a écrit :
> > > > umount /proc/fs/nfsd
> > > > 
> > > > 
> > > 
> > > Thans  a lot, this was the thing I missed !
> > > 
> > > 
> > 
> > Hmm, after this, I left things as the were (nfsd module loaded, but a 0
> > use count )
> > 
> > I got a BUG while updatedb was running,
> > (I tried this on a debian machine/kernel)
> > 
> > Same bug on :
> > 
> > cat /proc/self/mounts 
> 
> Any luck figuring this out?
> 
> I tried reproducing, by stopping everything to get nfsd refcount to
> zero:
> 
> 	# lsmod | grep '^nfsd'
> 	nfsd                  300025  0 
> 
> then running 'cat /proc/self/mounts'.
> 
> But I don't see any crash.
> 
> This is only 3.1.0-rc1 plus some nfsd patches.
> 
> --b.
> 
> > 
> > I'll take a look at this issue later, after my vacations, unless someone
> > wants to take a look before me ;)

Unfortunately, latest linux tree doesnt even boot on my machine, so I
cannot reproduce the problem right now.

Last message displayed being "Switching to clocksource tsc"

Previous kernels were continuing with :

[    4.448417] 00:09: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
[    4.597727] Real Time Clock Driver v1.12b

Might be a problem with latest tty changes 


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