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Date: Tue, 2 Aug 2005 23:07:46 +0200
From: Ingo Molnar <mingo@elte.hu>
To: Martin Hicks <mort@sgi.com>
Cc: Andrew Morton <akpm@osdl.org>, torvalds@osdl.org,
       linux-kernel@vger.kernel.org, ak@suse.de
Subject: Re: [patch] remove sys_set_zone_reclaim()
Message-ID: <20050802210746.GA26494@elte.hu>
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* Martin Hicks <mort@sgi.com> wrote:

> On Mon, Aug 01, 2005 at 09:54:26PM +0200, Ingo Molnar wrote:
> > 
> > * Andrew Morton <akpm@osdl.org> wrote:
> > 
> > > >  We could perhaps add a CAP_SYS_ADMIN-only sysctl for this hack,
> > > 
> > > That would be more appropriate.
> > > 
> > > (I'm still not sure what happened to the idea of adding a call to 
> > > "clear out this node+zone's pagecache now" rather than "set this 
> > > noed+zone's policy")
> > 
> > lets do that as a sysctl hack. It would be useful for debugging purposes 
> > anyway. But i'm not sure whether it's the same issue - Martin?
> 
> (Sorry..I was on vacation yesterday)
> 
> Yes, this is the same issue with a different way of making it happen. 
> Setting a zone's policy allows reclaim to happen automatically.
> 
> I'll send in a patch to add a sysctl to do the manual dumping of 
> pagecache really soon.

cool! [ Incidentally, when i found this problem i was looking for 
existing bits in the kernel to write such a patch myself (which i wanted 
to use on non-NUMA to create more reproducable workloads for 
performance-testing) - now i'll wait for your patch. ]

	Ingo