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

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Message-ID: <20110729165345.GM23194@fieldses.org>
Date:	Fri, 29 Jul 2011 12:53:45 -0400
From:	"J. Bruce Fields" <bfields@...ldses.org>
To:	Greg Banks <gnb@...tmail.fm>
Cc:	Eric Dumazet <eric.dumazet@...il.com>,
	Christoph Hellwig <hch@...radead.org>,
	NeilBrown <neilb@...e.de>,
	"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 Fri, Jul 29, 2011 at 12:48:36PM -0400, bfields wrote:
> On Fri, Jul 29, 2011 at 11:30:05PM +1000, Greg Banks wrote:
> > 
> > 
> > Sent from my iPhone
> > 
> > On 29/07/2011, at 22:11, Eric Dumazet <eric.dumazet@...il.com> wrote:
> > 
> > > Le vendredi 29 juillet 2011 à 21:58 +1000, Greg Banks a écrit :
> > >
> > >>
> > >> Sure, and a whole lot of the callsites are ("..._%d", cpu), hence the
> > >> unfortune :(
> > >
> > > BTW, we could name nfsd threads differently :
> > >
> > > Currently, they all are named : "nfsd"
> > >
> > > If SVC_POOL_PERCPU is selected, we could name them :
> > > nfsd_c0 -> nfsd_cN
> > >
> > > If SVC_POOL_PERNODE is selected, we could name them :
> > > nfsd_n0  -> nfsd_nN
> > >
> > > That would help to check with "ps aux" which cpu/nodes are under  
> > > stress.
> > >
> > >
> > 
> > I like it!
> 
> Yup, patch welcomed.--b.

(Annoying fact: some initscripts stop nfsd using a rough equivalent of
"killall nfsd".  So the name of the threads is arguably ABI.  I think
those initscripts are nuts and deserve what they get, but that may be
because I'm forgetting the reason they do that.)

--b.
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