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Date: Tue, 01 Oct 2002 09:06:15 -0700
From: "Martin J. Bligh" <mbligh@aracnet.com>
Reply-To: "Martin J. Bligh" <mbligh@aracnet.com>
To: Daniel Phillips <phillips@arcor.de>, Dave McCracken <dmccr@us.ibm.com>,
       "Gerold J. Wucherpfennig" <gjwucherpfennig@gmx.net>,
       linux-kernel@vger.kernel.org
Subject: Re: Page table sharing
Message-ID: <851859439.1033463169@[10.10.2.3]>
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> I'm not sure how relevant page table sharing has to the halloween 
> deadline since it's not a feature per se, just an optimization.   
> It has more to do with getting numa ia32 boxes to survive, so it's 
> an ideal out-of-tree patch.

Any large 32 bit box with significant numbers of processes will need 
it to cope with the bloat that rmap introduced - this has nothing to
do with NUMA (some apps may be saved by large pages, some not). 
Avoiding hangs from ZONE_NORMAL oom is not an "optimisation", and I 
doubt optimisations involving major VM changes would be very welcome
after the freeze. This is something we need to get working ASAP ...

M.