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Re: objrmap and vmtruncate

To: William Lee Irwin III <wli@holomorphy.com>
Subject: Re: objrmap and vmtruncate
From: Ingo Molnar <mingo@redhat.com>
Date: Tue, 22 Apr 2003 13:07:57 -0400 (EDT)
cc: "Martin J. Bligh" <mbligh@aracnet.com>,Andrew Morton <akpm@digeo.com>,Andrea Arcangeli <andrea@suse.de>, <mingo@elte.hu>,<hugh@veritas.com>, <dmccr@us.ibm.com>,Linus Torvalds <torvalds@transmeta.com>,<linux-kernel@vger.kernel.org>, <linux-mm@kvack.org>
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In-Reply-To: <20030422165842.GG8931@holomorphy.com>
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Sender: Rik van Riel <riel@nl.linux.org>

On Tue, 22 Apr 2003, William Lee Irwin III wrote:

> ISTR it being something on the order of running 32 instances of top(1),
> one per cpu, and then trying to fork().

oh, have you run any of the /proc fixes floating around? It still has some
pretty bad (quadratic) stuff left in, and done under tasklist_lock
read-help - if any write_lock_irq() of the tasklist lock hits this code
then you get an NMI assert. Please try either Manfred's or mine.

	Ingo

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References:
- Re: objrmap and vmtruncate
  - From: William Lee Irwin III <wli@holomorphy.com>

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