On Tue, 2009-09-15 at 14:11 +0200, Peter Zijlstra wrote: > On Tue, 2009-09-15 at 17:36 +0530, Gautham R Shenoy wrote: > > This patchset contains the offline state driver implemented for > > pSeries. For pSeries, we define three available_hotplug_states. They are: > > > > online: The processor is online. > > > > offline: This is the the default behaviour when the cpu is offlined > > even in the absense of this driver. The CPU would call make an > > rtas_stop_self() call and hand over the CPU back to the resource > > pool, > > thereby effectively deallocating that vCPU from the LPAR. > > NOTE: This would result in a configuration change to the LPAR > > which is visible to the outside world. > > > > inactive: This cedes the vCPU to the hypervisor with a cede latency > > specifier value 2. > > NOTE: This option does not result in a configuration change > > and the vCPU would be still entitled to the LPAR to which it earlier > > belong to. > > > > Any feedback on the patchset will be immensely valuable. > > I still think its a layering violation... its the hypervisor manager > that should be bothered in what state an off-lined cpu is in.
Yeah it probably is a layering violation, but when has that stopped us before :) Is it anticipated that this will be useful on platforms other than pseries? cheers
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