Re: [PATCH v2] x86/hyperv: Use per cpu initial stack for vtl context

[Wei Liu]

On Mon, Feb 05, 2024 at 04:36:42PM +0000, Michael Kelley wrote:
> From: Saurabh Sengar <ssengar@xxxxxxxxxxxxxxxxxxx> Sent: Thursday, February 1, 2024 11:13 PM
> > 
> > Currently, the secondary CPUs in Hyper-V VTL context lack support for
> > parallel startup. Therefore, relying on the single initial_stack fetched
> > from the current task structure suffices for all vCPUs.
> > 
> > However, common initial_stack risks stack corruption when parallel startup
> > is enabled. In order to facilitate parallel startup, use the initial_stack
> > from the per CPU idle thread instead of the current task.
> > 
> > Fixes: 18415f33e2ac ("cpu/hotplug: Allow "parallel" bringup up to CPUHP_BP_KICK_AP_STATE")
> > Signed-off-by: Saurabh Sengar <ssengar@xxxxxxxxxxxxxxxxxxx>
> > ---
[...]
> 
> Reviewed-by: Michael Kelley <mhklinux@xxxxxxxxxxx>

Applied. Thanks.