From: Linus Torvalds <torvalds@linux-foundation.org>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Dmitry Adamushko <dmitry.adamushko@gmail.com>,
Vegard Nossum <vegard.nossum@gmail.com>,
Paul Menage <menage@google.com>,
Max Krasnyansky <maxk@qualcomm.com>, Paul Jackson <pj@sgi.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
miaox@cn.fujitsu.com, Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@elte.hu>,
Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: current linux-2.6.git: cpusets completely broken
Date: Mon, 14 Jul 2008 21:04:12 -0700 (PDT) [thread overview]
Message-ID: <alpine.LFD.1.10.0807142057310.3017@woody.linux-foundation.org> (raw)
In-Reply-To: <Pine.LNX.4.58.0807142342450.8137@gandalf.stny.rr.com>
On Mon, 14 Jul 2008, Steven Rostedt wrote:
>
> Oh, I'm not arguing. My mind is going off to an even bigger picture, where
> something in the future would need to stop migration to a particular CPU,
> and that it could simply clear the bit and call synchronize_sched. The run
> queue lock is only visible to the scheduler. Sorry, I may have been day
> dreaming out loud ;-)
Well, you'd be stuck right now anyway.
At least in my trivial patch, the cpu_active_map locking is protected by
'cpu_add_remove_lock' which is static to cpu.c. The only thing that
modifies it (apart from the initial setup before SMP has been brought up)
is the hotplug code.
Linus
next prev parent reply other threads:[~2008-07-15 4:04 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-11 19:07 Vegard Nossum
2008-07-11 19:36 ` Paul Menage
2008-07-11 19:43 ` Vegard Nossum
2008-07-11 20:07 ` Max Krasnyansky
2008-07-11 23:03 ` Dmitry Adamushko
2008-07-11 23:19 ` Max Krasnyansky
2008-07-11 23:53 ` Dmitry Adamushko
2008-07-12 3:17 ` Vegard Nossum
2008-07-12 3:28 ` Linus Torvalds
2008-07-12 10:00 ` Miao Xie
2008-07-12 11:05 ` Dmitry Adamushko
2008-07-12 19:15 ` Linus Torvalds
2008-07-12 10:04 ` Dmitry Adamushko
2008-07-12 19:19 ` Max Krasnyansky
2008-07-12 20:10 ` Linus Torvalds
2008-07-12 21:30 ` Linus Torvalds
2008-07-12 22:07 ` Linus Torvalds
2008-07-12 22:43 ` Max Krasnyansky
2008-07-12 23:01 ` Linus Torvalds
2008-07-12 23:00 ` Vegard Nossum
2008-07-12 23:04 ` Linus Torvalds
2008-07-12 23:19 ` Dmitry Adamushko
2008-07-12 23:25 ` Dmitry Adamushko
2008-07-12 23:05 ` Dmitry Adamushko
2008-07-12 23:17 ` Linus Torvalds
2008-07-13 9:53 ` Dmitry Adamushko
2008-07-13 17:10 ` Linus Torvalds
2008-07-13 17:42 ` Ingo Molnar
2008-07-13 17:46 ` Linus Torvalds
2008-07-13 18:13 ` Dmitry Adamushko
2008-07-13 18:19 ` Ingo Molnar
2008-07-13 18:38 ` Linus Torvalds
2008-07-13 18:20 ` Linus Torvalds
2008-07-12 23:25 ` Vegard Nossum
2008-07-13 15:29 ` Andi Kleen
2008-07-14 15:49 ` Mike Travis
2008-07-14 22:38 ` Dmitry Adamushko
2008-07-14 23:05 ` Linus Torvalds
2008-07-15 0:00 ` Dmitry Adamushko
2008-07-15 0:23 ` Linus Torvalds
2008-07-15 2:21 ` Dmitry Adamushko
2008-07-15 3:03 ` Max Krasnyansky
2008-07-15 4:12 ` Linus Torvalds
2008-07-15 8:32 ` Ingo Molnar
2008-07-15 8:42 ` Max Krasnyansky
2008-07-15 8:57 ` Ingo Molnar
2008-07-15 9:12 ` Max Krasnyansky
2008-07-16 6:35 ` Max Krasnyansky
2008-07-16 7:10 ` Peter Zijlstra
2008-07-16 17:01 ` Max Krasnyansky
2008-07-15 3:23 ` Steven Rostedt
2008-07-15 3:36 ` Linus Torvalds
2008-07-15 3:47 ` Steven Rostedt
2008-07-15 4:04 ` Linus Torvalds [this message]
2008-07-15 4:16 ` Steven Rostedt
2008-07-12 10:45 Dmitry Adamushko
2008-07-12 11:14 ` Dmitry Adamushko
2008-07-13 0:10 ` Dmitry Adamushko
2008-07-13 8:50 ` Vegard Nossum
2008-07-13 9:41 ` Ingo Molnar
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