From: Andi Kleen <ak@suse.de>
To: Dave McCracken <dmccr@us.ibm.com>
Cc: Terje Eggestad <terje.eggestad@scali.no>, Andi Kleen <ak@suse.de>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] processes with shared vm
Date: Fri, 17 Aug 2001 22:55:37 +0200 [thread overview]
Message-ID: <20010817225537.B2429@gruyere.muc.suse.de> (raw)
In-Reply-To: <997973469.7632.10.camel@pc-16.suse.lists.linux.kernel> <oupelqbw0z4.fsf@pigdrop.muc.suse.de> <998038019.7627.21.camel@pc-16.office.scali.no> <36530000.998058370@baldur>
In-Reply-To: <36530000.998058370@baldur>; from dmccr@us.ibm.com on Fri, Aug 17, 2001 at 09:26:10AM -0500
On Fri, Aug 17, 2001 at 09:26:10AM -0500, Dave McCracken wrote:
> There is a simpler way to do this. All tasks belong to a thread group, and
> while thread groups are connected via a different clone flag
> (CLONE_THREAD), in practice CLONE_THREAD and CLONE_VM are generally used
> together. It would be trivial to add TGID to the information in /proc,
> then assume all tasks with the same TGID have the same VM as well. It
> would be just one more line in the /proc output and not require any
> additional overhead.
Even with a tgid you would need some way to avoid its counter wrapping
and getting reused. I think reusing the pid and pid hash for that is
cheaper. Also gtop should display correct results even with the programs
that don't use CLONE_THREAD.
-Andi
next prev parent reply other threads:[~2001-08-17 20:55 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <997973469.7632.10.camel@pc-16.suse.lists.linux.kernel>
2001-08-17 8:21 ` Andi Kleen
2001-08-17 14:26 ` Dave McCracken
2001-08-17 20:55 ` Andi Kleen [this message]
2001-08-17 21:15 ` Dave McCracken
2001-08-18 13:29 ` Terje Eggestad
2001-08-31 23:53 ` Mike Touloumtzis
2001-08-17 8:31 ` Robert Love
2001-08-17 8:46 ` Terje Eggestad
[not found] <Pine.LNX.4.10.10108171428450.21522-100000@coffee.psychology.mcmaster.ca>
[not found] ` <Pine.LNX.4.10.10108171428450.21522-100000@coffee.psychology.mcm aster.ca>
2001-08-17 14:39 ` Dave McCracken
2001-08-17 7:50 Terje Eggestad
2001-08-17 7:56 ` Robert Love
2001-08-17 8:08 ` Robert Love
2001-08-17 8:04 ` Terje Eggestad
2001-08-17 8:15 ` Terje Eggestad
2001-08-17 12:26 ` michael
2001-08-18 14:15 ` Terje Eggestad
2001-08-19 6:24 ` Albert D. Cahalan
2001-08-19 12:23 ` Terje Eggestad
2001-08-19 23:25 ` Albert D. Cahalan
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