Re: [Xen-devel] PML causing race condition during guest bootstorm and host crash on Broadwell cpu.

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 08.02.17 at 15:58, <anshul.makkar@xxxxxxxxxx> wrote:
> Code is trying to destroy multiple vcpus held by the domain: 
> complete_domain_destroy->hvm_vcpu_destroy() for each vcpu.
> 
> In vmx_vcpu_destroy, we have a call for vmx_vcpu_disable_pml which leads 
> to a race while destroying foreign vcpu's with other domains rebooting 
> on the same vcpus .
> 
> With a single domain reboot, no race is observed.
> 
> Commit e18d4274772e52ac81fda1acb246d11ef666e5fe causes this race condition.

Causes or exposes? I ask because the similar reports we have are
all on 4.4.x, i.e. no PML code there at all.

Jan


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