From: Greg Banks <gnb@sgi.com>
To: Neil Brown <neilb@suse.de>
Cc: Linux NFS Mailing List <nfs@lists.sourceforge.net>
Subject: Re: [PATCH] provide sunrpc pool_mode module option
Date: Thu, 22 Feb 2007 14:16:30 +1100 [thread overview]
Message-ID: <20070222031630.GD27743@sgi.com> (raw)
In-Reply-To: <17884.65022.790059.307696@notabene.brown>
On Thu, Feb 22, 2007 at 01:20:46PM +1100, Neil Brown wrote:
> On Thursday February 22, gnb@sgi.com wrote:
> >
> > Provide a module option "pool_mode" for sunrpc.ko which allows a
> > sysadmin to choose the mode for mapping svc_pools to CPUs. Values are:
> >
> > auto choose a mapping mode heuristically
> > global (default, same as the pre-2.6.19 code) a single global pool
> > percpu one pool per CPU
> > pernode one pool per NUMA node
> >
> > Note that since 2.6.19 the hardcoded behaviour has been "auto",
> > this patch makes the default "global".
>
> -ENODOC .... Documentation/kernel-parameters.txt should have this
> documented as sunrpc.pool_mode
My bad, I'll fix it.
> It bugs me slightly that you can only set this once. If you want to
> try a different option you have to reboot unless sunrpc is a module in
> which case you can rmmod and insmod.
Indeed.
> What would you think of making 'initialised' a count of active
> services that gets decremented from svc_destroy? Then you could just
> stop all nfsd (and lockd) threads, write a new value to
> /sys/module/sunrpc/parameters/pool_mode
> and restart the threads.
Sounds useful, I'll look into it. V2 patch coming soon.
Greg.
--
Greg (not Dave) Banks, R&D Software Engineer, SGI Australian Software Group.
I don't speak for SGI.
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prev parent reply other threads:[~2007-02-22 3:16 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-21 14:58 [PATCH] provide sunrpc pool_mode module option Greg Banks
2007-02-22 2:20 ` Neil Brown
2007-02-22 3:16 ` Greg Banks [this message]
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