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Date: Tue, 10 Sep 2013 08:47:39 +0200 From: Mike Galbraith <bitbucket@...ine.de> To: Gilad Ben-Yossef <gilad@...yossef.com> Cc: Christoph Lameter <cl@...ux.com>, Andrew Morton <akpm@...ux-foundation.org>, Thomas Gleixner <tglx@...utronix.de>, Frederic Weisbecker <fweisbec@...il.com>, Mike Frysinger <vapier@...too.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> Subject: Re: [RFC] Restrict kernel spawning of threads to a specified set of cpus. On Tue, 2013-09-10 at 09:05 +0300, Gilad Ben-Yossef wrote: > Hi, > > On Thu, Sep 5, 2013 at 11:07 PM, Christoph Lameter <cl@...ux.com> wrote: > > I am not sure how to call this kernel option but we need something like > > that. I see drivers and the kernel spawning processes on the nohz cores. > > The name kthread is not really catching the purpose. > > > > os_cpus=? highlatency_cpus=? > > > > First off, thank you for doing this. It is very useful :-) > > Currently if one wishes to run a single task on an isolated CPU with > as little interference as possible, one needs to pass > rcu_nocbs, isolcpus, nohz_full parameters and now kthread parameter, > all pretty much with the same values > > I know some people won't like this, but can we perhaps fold all these > into a single parameter, perhaps even the existing isolcpus? isolcpus is supposed to go away, as cpusets can isolate CPUs, and can turn off load balancing. -Mike -- 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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