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Date: Tue, 23 Oct 2001 19:59:08 -0200 (BRST)
From: Rik van Riel <riel@conectiva.com.br>
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To: Dave McCracken <dmccr@us.ibm.com>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: Issue with max_threads (and other resources) and highmem
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On Tue, 23 Oct 2001, Dave McCracken wrote:
> --On Tuesday, October 23, 2001 18:52:35 -0200 Rik van Riel
> <riel@conectiva.com.br> wrote:
>
> > I submitted a patch a while ago to set the number way lower,
> > which was accepted by Alan and in the -ac kernels. A few months
> > later Linus followed and changed the limit in his kernels, too.
>
> Ok, that's what I get for reading the comment and not deciphering the
> code...

*sigh*  So my updated comment got backed out again ;/

Linus, what do you have against correct documentation ? ;)

> But there's still a problem.  The value for mempages is all of physical
> memory including highmem, so a machine with a sufficient amount of high
> memory can set max_threads to a value way too high, given that most if not
> all of the resources it's trying to limit have to come from normal memory
> and not high memory.

Indeed, this needs to be fixed.  A sane upper limit for
max_threads would be 10000, this also keeps in mind the
fact that we only have 32000 possible PIDs, some of which
could be taken by task groups, etc...

regards,

Rik
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