linux-kernel - Re: [PATCH 1/3] Move zone_reclaim() outside of CONFIG

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Message-ID: <20101201052141.GJ2746@balbir.in.ibm.com>
Date:	Wed, 1 Dec 2010 10:51:41 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-mm@...ck.org, Christoph Lameter <cl@...ux.com>,
	linux-kernel@...r.kernel.org, kvm <kvm@...r.kernel.org>
Subject: Re: [PATCH 1/3] Move zone_reclaim() outside of CONFIG_NUMA

* Balbir Singh <balbir@...ux.vnet.ibm.com> [2010-12-01 10:04:08]:

> * Andrew Morton <akpm@...ux-foundation.org> [2010-11-30 14:23:38]:
> 
> > On Tue, 30 Nov 2010 15:45:12 +0530
> > Balbir Singh <balbir@...ux.vnet.ibm.com> wrote:
> > 
> > > This patch moves zone_reclaim and associated helpers
> > > outside CONFIG_NUMA. This infrastructure is reused
> > > in the patches for page cache control that follow.
> > > 
> > 
> > Thereby adding a nice dollop of bloat to everyone's kernel.  I don't
> > think that is justifiable given that the audience for this feature is
> > about eight people :(
> > 
> > How's about CONFIG_UNMAPPED_PAGECACHE_CONTROL?
> >
> 
> OK, I'll add the config, but this code is enabled under CONFIG_NUMA
> today, so the bloat I agree is more for non NUMA users. I'll make
> CONFIG_UNMAPPED_PAGECACHE_CONTROL default if CONFIG_NUMA is set.
>  
> > Also this patch instantiates sysctl_min_unmapped_ratio and
> > sysctl_min_slab_ratio on non-NUMA builds but fails to make those
> > tunables actually tunable in procfs.  Changes to sysctl.c are
> > needed.
> > 
> 
> Oh! yeah.. I missed it while refactoring, my fault.
> 
> > > Reviewed-by: Christoph Lameter <cl@...ux.com>
> > 

My local MTA failed to deliver the message, trying again.

-- 
	Three Cheers,
	Balbir
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