From: Wei Liu <wei.liu@kernel.org>
To: Michael Kelley <mhklinux@outlook.com>
Cc: Saurabh Sengar <ssengar@linux.microsoft.com>,
"kys@microsoft.com" <kys@microsoft.com>,
"haiyangz@microsoft.com" <haiyangz@microsoft.com>,
"wei.liu@kernel.org" <wei.liu@kernel.org>,
"decui@microsoft.com" <decui@microsoft.com>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"mingo@redhat.com" <mingo@redhat.com>,
"bp@alien8.de" <bp@alien8.de>,
"dave.hansen@linux.intel.com" <dave.hansen@linux.intel.com>,
"x86@kernel.org" <x86@kernel.org>,
"hpa@zytor.com" <hpa@zytor.com>,
"dwmw@amazon.co.uk" <dwmw@amazon.co.uk>,
"peterz@infradead.org" <peterz@infradead.org>,
"linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"ssengar@microsoft.com" <ssengar@microsoft.com>
Subject: Re: [PATCH v2] x86/hyperv: Use per cpu initial stack for vtl context
Date: Fri, 1 Mar 2024 09:26:31 +0000 [thread overview]
Message-ID: <ZeGfR__K8bRvT-Q5@liuwe-devbox-debian-v2> (raw)
In-Reply-To: <SN6PR02MB41570D2084D1B0ACA988EA0FD4472@SN6PR02MB4157.namprd02.prod.outlook.com>
On Mon, Feb 05, 2024 at 04:36:42PM +0000, Michael Kelley wrote:
> From: Saurabh Sengar <ssengar@linux.microsoft.com> 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@linux.microsoft.com>
> > ---
[...]
>
> Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Applied. Thanks.
prev parent reply other threads:[~2024-03-01 9:26 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-02 7:12 [PATCH v2] x86/hyperv: Use per cpu initial stack for vtl context Saurabh Sengar
2024-02-05 16:36 ` Michael Kelley
2024-03-01 9:26 ` Wei Liu [this message]
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