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Date: Wed, 10 Jul 2002 01:05:45 -0700
From: Andrew Morton <akpm@zip.com.au>
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To: Roy Sigurd Karlsbakk <roy@karlsbakk.net>
CC: "Martin J. Bligh" <Martin.Bligh@us.ibm.com>, linux-kernel@vger.kernel.org
Subject: Re: [2.4 BUFFERING BUG] (was [BUG] 2.4 VM sucks. Again)
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Roy Sigurd Karlsbakk wrote:
> 
> hi
> 
> I've been using the patch below from Andrew for some weeks now, sometimes
> under quite heavy load, and find it quite stable.
> 

Wish we knew why.  I've tried many times to reproduce the problem
which you're seeing.  With just two gigs of memory, buffer_heads
really cannot explain anything.  It's weird.

We discussed this in Ottawa - I guess Andrea will add the toss-the-buffers
code on the read side (basically the filemap.c stuff).  That may
be sufficient, but without an understanding of what is going on,
it is hard to predict.

-