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Message-ID: <1332767386.23924.75.camel@gandalf.stny.rr.com> Date: Mon, 26 Mar 2012 09:09:46 -0400 From: Steven Rostedt <rostedt@...dmis.org> To: Peter Zijlstra <a.p.zijlstra@...llo.nl> Cc: Rusty Russell <rusty@...tcorp.com.au>, paulmck@...ux.vnet.ibm.com, "Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>, Arjan van de Ven <arjan@...radead.org>, "Rafael J. Wysocki" <rjw@...k.pl>, Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>, "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>, Paul Gortmaker <paul.gortmaker@...driver.com>, Milton Miller <miltonm@....com>, "mingo@...e.hu" <mingo@...e.hu>, Tejun Heo <tj@...nel.org>, KOSAKI Motohiro <kosaki.motohiro@...il.com>, linux-kernel <linux-kernel@...r.kernel.org>, Linux PM mailing list <linux-pm@...r.kernel.org> Subject: Re: CPU Hotplug rework On Mon, 2012-03-26 at 10:02 +0200, Peter Zijlstra wrote: > On Mon, 2012-03-26 at 11:11 +1030, Rusty Russell wrote: > > Obviously, having callbacks hanging around until the CPU comes back is > > not viable, nor is blocking preempt during the callbacks. Calling > > get_online_cpus() is too heavy. > > -rt has patches (albeit somewhat ugly) to make get_online_cpus() a br > style rw-lock. Unfortunately, -rt still has broken cpu hotplug. -- Steve -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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