Messages in this thread | | | Date | Wed, 20 Jun 2012 15:06:54 +0530 | From | "Srivatsa S. Bhat" <> | Subject | Re: [PATCH v6 0/4] CPU hotplug, cpusets, suspend/resume: Fixes, cleanups and optimizations |
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On 05/24/2012 07:46 PM, Srivatsa S. Bhat wrote:
> Currently the kernel doesn't handle cpusets properly during suspend/resume. > After a resume, all non-root cpusets end up having only 1 cpu (the boot cpu), > causing massive performance degradation of workloads. One major user of cpusets > is libvirt, which means that after a suspend/hibernation cycle, all VMs > suddenly end up running terribly slow! > > Also, the kernel moves the tasks from one cpuset to another during CPU hotplug > in the suspend/resume path, leading to a task-management nightmare after > resume. > > Patch 1 fixes this by keeping cpusets unmodified in the suspend/resume path. > But to ensure we don't trip over, it keeps the sched domains updated during > every CPU hotplug in the s/r path. > This is a long standing issue and we need to fix up stable kernels too. > > The rest of the patches in the series are mostly cleanups/optimizations. >
Hi Peter,
Would you be taking these patches through -tip for 3.6?
Regards, Srivatsa S. Bhat
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