Messages in this thread | | | Date | Fri, 2 May 2014 17:31:53 +0200 | From | Sebastian Andrzej Siewior <> | Subject | Re: [PATCH RT 1/3] rt: Move migrate_disable up in trylocks |
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* Steven Rostedt | 2014-04-30 20:47:58 [-0400]:
>From: Steven Rostedt <rostedt@goodmis.org> > >The changes to move the migrate_disable() down in the trylocks() >caused race conditions to appear in the cpu hotplug code. The >migrate disables must be done before any of the rtmutexes are >taken, otherwise a lock may be held that prevents hotplug from >moving forward. > >Link: http://lkml.kernel.org/r/20140429201308.63292691@gandalf.local.home
Okay. I am taking a modified version (so it applies) of this into v3.14 tree. Mike also suggested to drop migrate_disable-pushd-down-in-atomic_dec_and_spin_lo.patch because we which is basicaly the some thing. And then we have migrate_disable-pushd-down-in-rt_spin_trylock_irqsav.patch which we could drop as well for the same reason.
Sebastian
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