From: Gautham R Shenoy <ego@in.ibm.com>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>,
vatsa@in.ibm.com, Rusty Russell <rusty@rustcorp.com.au>,
Linux Kernel <linux-kernel@vger.kernel.org>,
Zwane Mwaikambo <zwane@arm.linux.org.uk>,
Nathan Lynch <nathanl@austin.ibm.com>,
Joel Schopp <jschopp@austin.ibm.com>,
Ashok Raj <ashok.raj@intel.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Ingo Molnar <mingo@elte.hu>,
paulmck@us.ibm.com
Subject: Re: [BUG] cpu-hotplug: Can't offline the CPU with naughty realtime processes
Date: Wed, 9 May 2007 14:26:12 +0530 [thread overview]
Message-ID: <20070509085611.GA4431@in.ibm.com> (raw)
In-Reply-To: <46411A36.2050609@yahoo.com.au>
On Wed, May 09, 2007 at 10:47:50AM +1000, Nick Piggin wrote:
>
> We've seen the same problem with other stop_machine_run sites in the kernel.
> module remove was one.
>
> Reserving the top priority slot for stop machine (and migration thread, I
> guess) isn't a bad idea.
I second this thought.
The process freezer, if used will only safeguard cpu-hotplug, but not other
sites which use stop_machine_run.
>
> --
> SUSE Labs, Novell Inc.
Regards
gautham.
--
Gautham R Shenoy
Linux Technology Center
IBM India.
"Freedom comes with a price tag of responsibility, which is still a bargain,
because Freedom is priceless!"
next prev parent reply other threads:[~2007-05-09 8:57 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-07 10:10 [BUG] cpu-hotplug: Can't offline the CPU with naughty realtime processes Satoru Takeuchi
2007-05-07 10:47 ` Gautham R Shenoy
2007-05-07 11:02 ` Srivatsa Vaddagiri
2007-05-07 12:39 ` Gautham R Shenoy
2007-05-07 10:55 ` Srivatsa Vaddagiri
2007-05-07 10:56 ` KAMEZAWA Hiroyuki
2007-05-07 13:42 ` Rusty Russell
2007-05-08 2:41 ` Satoru Takeuchi
2007-05-08 3:02 ` Rusty Russell
2007-05-08 3:29 ` Satoru Takeuchi
2007-05-08 4:04 ` Rusty Russell
2007-05-08 4:10 ` Srivatsa Vaddagiri
2007-05-08 7:16 ` Satoru Takeuchi
2007-05-08 16:48 ` Srivatsa Vaddagiri
2007-05-09 0:40 ` Satoru Takeuchi
2007-05-09 0:47 ` Nick Piggin
2007-05-09 6:31 ` Satoru Takeuchi
2007-05-09 8:56 ` Gautham R Shenoy [this message]
2007-05-11 8:49 ` [PATCH 1/2] Fix stop_machine_run problem with naughty real time process Satoru Takeuchi
2007-05-11 9:18 ` Satoru Takeuchi
2007-05-11 8:49 ` [PATCH 2/2] cpu hotplug: fix ksoftirqd termination on cpu hotplug with naughty realtime process Satoru Takeuchi
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