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Open Source and information security mailing list archives
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Date: Fri, 9 Oct 2015 11:08:52 +0200 From: Peter Zijlstra <peterz@...radead.org> To: Andy Lutomirski <luto@...capital.net> Cc: Chris Metcalf <cmetcalf@...hip.com>, Luiz Capitulino <lcapitulino@...hat.com>, Gilad Ben Yossef <giladb@...hip.com>, Steven Rostedt <rostedt@...dmis.org>, Ingo Molnar <mingo@...nel.org>, Andrew Morton <akpm@...ux-foundation.org>, Rik van Riel <riel@...hat.com>, Tejun Heo <tj@...nel.org>, Frederic Weisbecker <fweisbec@...il.com>, Thomas Gleixner <tglx@...utronix.de>, "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>, Christoph Lameter <cl@...ux.com>, Viresh Kumar <viresh.kumar@...aro.org>, Catalin Marinas <catalin.marinas@....com>, Will Deacon <will.deacon@....com>, "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Linus Torvalds <torvalds@...ux-foundation.org> Subject: Re: crazy idea: big percpu lock (Re: task isolation) On Thu, Oct 08, 2015 at 02:25:23PM -0700, Andy Lutomirski wrote: > I want to propose a new primitive that might go a long way toward > solving this issue. The new primitive would be called the "big percpu > lock". Never, ever, combine big and lock :-) You want small granular locks, big locks are a guaranteed recipe for pain. -- 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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