Re: [Xen-devel] [PATCH v4] x86/vpmu: add cpu hot unplug notifier for vpmu

2017-05-26 Thread Boris Ostrovsky
On 05/26/2017 10:05 AM, Jan Beulich wrote: On 22.05.17 at 22:45, wrote: >> Currently, Hot unplug a physical CPU with vpmu enabled may cause >> system hang due to send a remote call to an offlined pCPU. This >> patch add a cpu hot unplug notifer to save vpmu context before >> cpu offline. >> >

Re: [Xen-devel] [PATCH v4] x86/vpmu: add cpu hot unplug notifier for vpmu

2017-05-26 Thread Jan Beulich
>>> On 22.05.17 at 22:45, wrote: > Currently, Hot unplug a physical CPU with vpmu enabled may cause > system hang due to send a remote call to an offlined pCPU. This > patch add a cpu hot unplug notifer to save vpmu context before > cpu offline. > > Consider one scenario, hot unplug pCPU N with v

[Xen-devel] [PATCH v4] x86/vpmu: add cpu hot unplug notifier for vpmu

2017-05-23 Thread Luwei Kang
Currently, Hot unplug a physical CPU with vpmu enabled may cause system hang due to send a remote call to an offlined pCPU. This patch add a cpu hot unplug notifer to save vpmu context before cpu offline. Consider one scenario, hot unplug pCPU N with vpmu enabled. The vcpu which running on this pC