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Re: Kernel 2.6.9 Multiple Page Allocation Failures

To: Andrew Morton <akpm@xxxxxxxx>
Subject: Re: Kernel 2.6.9 Multiple Page Allocation Failures
From: Lukas Hejtmanek <xhejtman@xxxxxxxxxxxxxxxxx>
Date: Fri, 3 Dec 2004 00:18:37 +0100
Cc: Stefan Schmidt <zaphodb@xxxxxxxxxxx>, marcelo.tosatti@xxxxxxxxxxxx, piggin@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-xfs@xxxxxxxxxxx
In-reply-to: <20041202145610.49e27b49.akpm@xxxxxxxx>
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On Thu, Dec 02, 2004 at 02:56:10PM -0800, Andrew Morton wrote:
> It's quite possible that XFS is performing rather too many GFP_ATOMIC
> allocations and is depleting the page reserves.  Although increasing
> /proc/sys/vm/min_free_kbytes should help there.

Btw, how the min_free_kbytes works?

I have up to 1MB TCP windows. If I'm running out of memory then kswapd should
try to free some memory (or bdflush). But on GE I can receive data faster then
disk is able to swap or flush buffers. So I should keep min_free big enough to
give time to disk to flush/swap data?


-- 
Lukáš Hejtmánek


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