From: Lee Revell <rlrevell@joe-job.com>
To: Luke-Jr <luke@dashjr.org>
Cc: "Måns Rullgård" <mru@inprovide.com>, linux-kernel@vger.kernel.org
Subject: Re: can I bring Linux down by running "renice -20 cpu_intensive_process"?
Date: Sat, 11 Mar 2006 22:46:42 -0500 [thread overview]
Message-ID: <1142135202.25358.50.camel@mindpipe> (raw)
In-Reply-To: <200603120141.08129.luke@dashjr.org>
On Sun, 2006-03-12 at 01:41 +0000, Luke-Jr wrote:
> On Friday 10 March 2006 22:01, Måns Rullgård wrote:
> > Sysrq+n changes all realtime tasks to normal priority.
>
> Would the kernel's main loop (where I presume Sysreq is handled) get a chance
> to run with a constantly busy realtime task?
No, other tasks will not get to run at all. A SCHED_FIFO task that
spins forever is a fatal bug. Making it less dangerous would require
making it less useful.
Lee
next prev parent reply other threads:[~2006-03-12 3:46 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-10 13:36 can I bring Linux down by running "renice -20 cpu_intensive_process"? Tomasz Chmielewski
2006-03-10 14:44 ` Jan Engelhardt
2006-03-10 14:52 ` Tomasz Chmielewski
2006-03-10 22:01 ` Måns Rullgård
2006-03-10 22:06 ` Jeffrey Hundstad
2006-03-11 10:42 ` Måns Rullgård
2006-03-12 1:41 ` Luke-Jr
2006-03-12 3:46 ` Lee Revell [this message]
2006-03-12 3:50 ` Lee Revell
2006-03-12 3:44 ` Lee Revell
2006-03-12 12:00 ` Måns Rullgård
2006-03-16 21:15 ` Bill Davidsen
2006-03-16 22:11 ` Lee Revell
2006-03-16 22:51 ` Måns Rullgård
2006-03-17 6:05 ` Mike Galbraith
2006-03-17 22:22 ` Måns Rullgård
2006-03-18 12:38 ` Bill Davidsen
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