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Re: [PATCH] 2.2.1{3,4,5} VM fix

To: Andrea Arcangeli <andrea@suse.de>
Subject: Re: [PATCH] 2.2.1{3,4,5} VM fix
From: Rik van Riel <riel@nl.linux.org>
Date: Fri, 21 Jan 2000 20:18:36 +0100 (CET)
cc: Alan Cox <alan@lxorguk.ukuu.org.uk>, Linux Kernel <linux-kernel@vger.rutgers.edu>, Linux MM <linux-mm@kvack.org>
In-Reply-To: <Pine.LNX.4.21.0001211353200.486-100000@alpha.random>
Organisation: NL.linux.org (http://www.nl.linux.org/)
Sender: owner-linux-mm@kvack.org

On Fri, 21 Jan 2000, Andrea Arcangeli wrote:

> Since 2.1.x all GFP_KERNEL allocations (not atomic) succeed too.

Alan, I think we've located the bug that made 2.2 kernels
run completely out of memory :)

Andrea, the last few pages are meant for ATOMIC and
PF_MEMALLOC allocations only, otherwise you'll get
deadlock situations.

And don't point me at buggy code that crashes if its
GFP_KERNEL allocation fails. That same code would
also crash if it were allowed to fill up freepages.min
and then run really out of memory...

regards,

Rik
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Follow-Ups:
- Re: [PATCH] 2.2.1{3,4,5} VM fix
  - From: Andrea Arcangeli <andrea@suse.de>

References:
- Re: [PATCH] 2.2.1{3,4,5} VM fix
  - From: Andrea Arcangeli <andrea@suse.de>

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