Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262165AbVAYWBw (ORCPT ); Tue, 25 Jan 2005 17:01:52 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262180AbVAYWBt (ORCPT ); Tue, 25 Jan 2005 17:01:49 -0500 Received: from mx2.elte.hu ([157.181.151.9]:44954 "EHLO mx2.elte.hu") by vger.kernel.org with ESMTP id S262172AbVAYV6u (ORCPT ); Tue, 25 Jan 2005 16:58:50 -0500 Date: Tue, 25 Jan 2005 22:57:58 +0100 From: Ingo Molnar To: Chris Wright Cc: "Jack O'Quin" , Paul Davis , Con Kolivas , linux , rlrevell@joe-job.com, CK Kernel , utz , Andrew Morton , alexn@dsv.su.se, Rui Nuno Capela , Arjan van de Ven , Nick Piggin Subject: Re: [patch, 2.6.11-rc2] sched: /proc/sys/kernel/rt_cpu_limit tunable Message-ID: <20050125215758.GA10811@elte.hu> References: <87wtu6fho8.fsf@sulphur.joq.us> <20050122165458.GA14426@elte.hu> <87hdl940ph.fsf@sulphur.joq.us> <20050124085902.GA8059@elte.hu> <20050124125814.GA31471@elte.hu> <87k6q2umla.fsf@sulphur.joq.us> <20050125083724.GA4812@elte.hu> <87oefdfaxp.fsf@sulphur.joq.us> <20050125214900.GA9421@elte.hu> <20050125135508.A24171@build.pdx.osdl.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20050125135508.A24171@build.pdx.osdl.net> User-Agent: Mutt/1.4.1i X-ELTE-SpamVersion: MailScanner 4.31.6-itk1 (ELTE 1.2) SpamAssassin 2.63 ClamAV 0.73 X-ELTE-VirusStatus: clean X-ELTE-SpamCheck: no X-ELTE-SpamCheck-Details: score=-4.9, required 5.9, autolearn=not spam, BAYES_00 -4.90 X-ELTE-SpamLevel: X-ELTE-SpamScore: -4 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1074 Lines: 24 * Chris Wright wrote: > * Ingo Molnar (mingo@elte.hu) wrote: > > well, there's setrlimit, so you could add a jackd client callback that > > instructs all clients to change their RT_CPU_RATIO rlimit. In theory we > > could try to add a new rlimit syscall that changes another task's rlimit > > (right now the syscalls only allow the changing of the rlimit of the > > current task) - that would enable utilities to change the rlimit of all > > tasks in the system, achieving the equivalent of a global sysctl. > > We've talked about smth. similar in another thread. I'm not opposed > to the idea. did that thread go into technical details? There are some rlimit users that might not be prepared to see the rlimit change under them. The RT_CPU_RATIO one ought to be safe, but generally i'm not so sure. Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/