From: Dan Kegel <dank@kegel.com>
To: Rik van Riel <riel@conectiva.com.br>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: Issue with max_threads (and other resources) and highmem
Date: Tue, 23 Oct 2001 17:00:17 -0700 [thread overview]
Message-ID: <3BD60491.25152E6C@kegel.com> (raw)
In-Reply-To: <Pine.LNX.4.33L.0110232134470.3690-100000@imladris.surriel.com>
Rik van Riel wrote:
>
> On Tue, 23 Oct 2001, Dan Kegel wrote:
> > Rik wrote:
> > > ... 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...
> >
> > ? I thought the 2.4 kernel had switched to 32 bit pid's long ago.
> > Where does the limit of 32000 possible PIDs come from?
>
> Please take a look at kernel/fork.c::get_pid() ...
Yes, I see the limit is enforced there, but why do we need that limit?
There are probably a bunch of user-space programs that assume
a pid fits in five digits, is that the main reason?
- Dan
next prev parent reply other threads:[~2001-10-23 23:59 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-23 23:30 Issue with max_threads (and other resources) and highmem Dan Kegel
2001-10-23 23:35 ` Rik van Riel
2001-10-24 0:00 ` Dan Kegel [this message]
-- strict thread matches above, loose matches on Subject: below --
2001-10-23 20:19 Dave McCracken
2001-10-23 20:36 ` Andi Kleen
2001-10-23 20:46 ` Dave McCracken
2001-10-23 20:52 ` Rik van Riel
2001-10-23 21:05 ` Dave McCracken
2001-10-23 21:59 ` Rik van Riel
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