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Re: [Ksummit-2005-discuss] Summary of 2005 Kernel Summit Proposed Topics

To: Andi Kleen <ak@xxxxxx>
Subject: Re: [Ksummit-2005-discuss] Summary of 2005 Kernel Summit Proposed Topics
From: Andrea Arcangeli <andrea@xxxxxxx>
Date: Wed, 30 Mar 2005 17:44:18 +0200
Cc: jamal <hadi@xxxxxxxxxx>, Dmitry Yusupov <dmitry_yus@xxxxxxxxx>, James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>, Rik van Riel <riel@xxxxxxxxxx>, mpm@xxxxxxxxxxx, michaelc@xxxxxxxxxxx, open-iscsi@xxxxxxxxxxxxxxxx, ksummit-2005-discuss@xxxxxxxxx, netdev <netdev@xxxxxxxxxxx>
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On Wed, Mar 30, 2005 at 05:39:48PM +0200, Andi Kleen wrote:
> An unsolveable one IMHO. You can just try to be good enough. For that

I think it's solvable with an algorithm I outlined several emails ago.

> Basically same thing we do about highmem vs lowmem.

That's not a deadlock, the lowmem vs highmem issue is about running out
of memory too early and getting a -ENOMEM out of a syscall (or a
oom-killing).

A few buggy kernels deadlocked in such condition but that just because
those buggy kernels would deadlock in most oom condition anyway, current
2.6 kernels and latest 2.4 shouldn't deadlock on a lowmem shortage.

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