From: Robert Love <rml@tech9.net>
To: Felipe Alfaro Solana <yo@felipe-alfaro.com>
Cc: "Shaheed R. Haque" <srhaque@iee.org>,
Andrew Morton <akpm@digeo.com>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: 2.6 must-fix list, v2
Date: 14 May 2003 11:59:36 -0400 [thread overview]
Message-ID: <1052927975.883.9.camel@icbm> (raw)
In-Reply-To: <1052910149.586.3.camel@teapot.felipe-alfaro.com>
On Wed, 2003-05-14 at 07:02, Felipe Alfaro Solana wrote:
> > > > - Add ability to restrict the the default CPU affinity mask so that
> > > > sys_setaffinity() can be used to implement exclusive access to a CPU.
> > >
> > > Why is this useful?
> >
> > I forgot to add that the result is the rough equivalent of Digital UNIX's psets
> > and Irix's sysmp for my prurposes at least.
>
> And psets and fencing in Solaris too...
You can get exclusive access with mangling the system call, simply by
having init bind itself to the non-exclusive processors on boot.
Try it. Every task will then end up on only the non-exclusive
processors. Seems a very simple change to me, and one that can be done
in user-space.
You do not even have to modify init, if you do not want. Grab
http://tech9.net/rml/schedutils and put a taskset call in your rc.d
Robert Love
next prev parent reply other threads:[~2003-05-14 15:44 UTC|newest]
Thread overview: 89+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-04-12 11:20 Processor sets (pset) for linux kernel 2.5/2.6? Shaheed R. Haque
2003-04-12 12:11 ` Dave Jones
2003-04-12 12:24 ` Antonio Vargas
2003-04-12 14:54 ` Martin J. Bligh
2003-04-12 18:23 ` Robert Love
2003-04-12 19:56 ` Shaheed R. Haque
2003-04-12 20:02 ` Robert Love
2003-04-13 8:30 ` Shaheed R. Haque
2003-04-13 14:28 ` Robert Love
2003-05-13 11:49 ` 2.6 must-fix list, v2 Shaheed R. Haque
2003-05-13 20:02 ` Andrew Morton
2003-05-13 22:46 ` Shaheed R. Haque
2003-05-14 2:42 ` Steven Cole
2003-05-14 11:49 ` Shaheed R. Haque
2003-05-14 13:08 ` Steven Cole
2003-05-13 22:49 ` Shaheed R. Haque
2003-05-14 11:02 ` Felipe Alfaro Solana
2003-05-14 15:59 ` Robert Love [this message]
2003-05-14 16:04 ` Robert Love
2003-05-14 21:01 ` shaheed
2003-05-14 21:15 ` Robert Love
2003-05-15 9:19 ` Shaheed R. Haque
2003-05-15 15:32 ` Robert Love
2003-05-15 20:07 ` shaheed
2003-05-15 20:20 ` Robert Love
2003-05-15 20:24 ` Robert Love
2003-05-15 21:30 ` shaheed
2003-04-13 3:52 ` Re: Processor sets (pset) for linux kernel 2.5/2.6? Martin J. Bligh
2003-07-15 11:39 ` [HOWTO] Emulate processor sets (pset) for linux kernel 2.5/2.6 \"shaheed r. haque\"
2003-04-14 22:40 ` [RFC] patch to allow CPUs to be reserved to callers of sys_setaffinity [was Processor sets (pset) for linux kernel 2.5/2.6?] shaheed
2003-05-01 20:19 ` Working .config for a Dell 2650 for 2.5.6x? (was Re: Processor sets (pset) for linux kernel 2.5/2.6?) shaheed
2003-05-12 22:54 2.6 must-fix list, v2 Andrew Morton
2003-05-12 22:55 ` Andrew Morton
2003-05-13 4:05 ` viro
2003-05-13 5:00 ` Greg KH
2003-05-13 11:36 ` Trond Myklebust
2003-05-13 13:57 ` Dave Jones
2003-05-13 15:16 ` Trond Myklebust
2003-05-13 15:22 ` Dave Jones
2003-05-13 15:32 ` Trond Myklebust
2003-05-13 15:47 ` Dave Jones
2003-05-13 16:02 ` Trond Myklebust
2003-05-13 16:09 ` Dave Jones
2003-05-13 16:27 ` Trond Myklebust
2003-05-13 16:45 ` Dave McCracken
2003-05-13 16:53 ` Trond Myklebust
2003-05-13 22:50 ` Andrew Morton
2003-05-13 17:38 ` Dave Jones
2003-05-13 17:59 ` Trond Myklebust
2003-05-13 15:59 ` Daniel Jacobowitz
2003-05-13 16:11 ` Trond Myklebust
2003-05-13 18:09 ` Daniel Jacobowitz
2003-05-13 20:15 ` Chris Friesen
2003-05-13 20:25 ` Trond Myklebust
2003-05-13 13:57 ` Alan Cox
2003-05-13 15:00 ` Jeff Garzik
2003-05-13 15:12 ` Jens Axboe
2003-05-13 15:38 ` Christoph Hellwig
2003-05-13 15:50 ` Jeff Garzik
2003-05-13 16:59 ` Sam Ravnborg
2003-05-13 20:07 ` Geert Uytterhoeven
2003-05-13 20:12 ` Sam Ravnborg
2003-05-13 19:51 ` Geert Uytterhoeven
2003-05-13 20:17 ` Andrew Morton
2003-05-13 22:25 ` Dave Jones
2003-05-13 22:52 ` William Lee Irwin III
2003-05-13 23:43 ` Russell King
2003-05-14 8:09 ` Geert Uytterhoeven
[not found] ` <mailman.1052866140.9783.linux-kernel2news@redhat.com>
2003-05-14 2:32 ` Pete Zaitcev
2003-05-14 16:21 ` Tom Rini
2003-05-17 8:58 ` Pavel Machek
2003-05-13 15:47 ` Trond Myklebust
2003-05-13 15:06 ` Alan Cox
2003-05-13 16:20 ` Trond Myklebust
2003-05-13 17:52 ` Miquel van Smoorenburg
2003-05-13 18:11 ` Trond Myklebust
2003-05-17 8:56 ` Pavel Machek
2003-05-13 0:22 ` Greg KH
2003-05-13 1:57 Chuck Ebbert
[not found] <20030512155417.67a9fdec.akpm@digeo.com.suse.lists.linux.kernel>
[not found] ` <20030512155511.21fb1652.akpm@digeo.com.suse.lists.linux.kernel>
2003-05-13 6:00 ` Andi Kleen
2003-05-13 17:12 James Bottomley
2003-05-13 18:11 ` Mike Anderson
2003-05-13 18:18 ` James Bottomley
2003-05-13 19:14 ` Mike Anderson
2003-05-13 20:04 Chuck Ebbert
2003-05-14 2:05 Perez-Gonzalez, Inaky
2003-05-14 2:43 ` Zwane Mwaikambo
2003-05-14 12:05 ` Shaheed R. Haque
2003-05-14 18:21 Perez-Gonzalez, Inaky
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