linux-kernel - Re: [PATCH 004 of 4] knfsd: Provide sunrpc pool

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Message-Id: <20070305205757.2d5db738.akpm@linux-foundation.org>
Date:	Mon, 5 Mar 2007 20:57:57 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	NeilBrown <neilb@...e.de>
Cc:	nfs@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 004 of 4] knfsd: Provide sunrpc pool_mode module option

On Tue, 6 Mar 2007 13:15:20 +1100 NeilBrown <neilb@...e.de> wrote:

> Provide a module param "pool_mode" for sunrpc.ko which allows a
> sysadmin to choose the mode for mapping NFS thread service 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".
> 
> The pool mode can be changed after boot/modprobe using /sys, if the
> NFS and lockd services have been shut down.  A useful side effect of
> this change is to fix a small memory leak when unloading the module.

Mutter.  Is this really suitable and needed for 2.6.21 at this stage in
its life?
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