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Date: Thu, 05 Nov 2015 21:26:48 -0500 From: Rik van Riel <riel@...hat.com> To: "Rafael J. Wysocki" <rjw@...ysocki.net> CC: linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org, rafael.j.wysocki@...el.com, arjan@...ux.intel.com, len.brown@...el.com, daniel.lezcano@...aro.org Subject: Re: [PATCH 0/3] cpuidle: small improvements & fixes for menu governor (resend) On 11/05/2015 05:34 PM, Rafael J. Wysocki wrote: > On Tuesday, November 03, 2015 05:34:16 PM riel@...hat.com wrote: >> While working on a paravirt cpuidle driver for KVM guests, I >> noticed a number of small logic errors in the menu governor >> code. >> >> These patches should get rid of some artifacts that can break >> the logic in the menu governor under certain corner cases, and >> make idle state selection work better on CPUs with long C1 exit >> latencies. >> >> I have not seen any adverse effects with them in my (quick) >> tests. As expected, they do not seem to do much on systems with >> many power states and very low C1 exit latencies and target residencies. > > Thanks! > > The patches look good to me. > > I might apply [1-2/3] right away, but I'm a bit hesitant about the [3/3] (I'd > like it to spend some time in linux-next before it goes to Linus). Also, we've > lived without these changes for quite some time and I don't want to stretch the > process too much, so I'll queue them up for v4.5 if that's not a problem. Not a problem at all. I am all for taking these changes carefully, and seeing what happens. I did some basic testing with it, but the permutations of what can happen with cpuidle management are just too many to predict in advance everything that could happen. -- All rights reversed -- 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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