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Re: [PATCH v2 2/2] xen/x86: introduce MCE_NONFATAL
- To: Stefano Stabellini <stefano.stabellini@xxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Alejandro Vallejo <alejandro.garciavallejo@xxxxxxx>
- Date: Wed, 9 Jul 2025 11:46:58 +0200
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- Delivery-date: Wed, 09 Jul 2025 09:47:11 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Tue Jul 8, 2025 at 8:32 PM CEST, Stefano Stabellini wrote:
> Today, checking for non-fatal MCE errors on AMD is very invasive: it
> involves a periodic timer interrupting the physical CPU execution at
> regular intervals. Moreover, when the timer fires, the handler sends an
> IPI to all physical CPUs.
>
> Both these actions are disruptive in terms of latency and deterministic
> execution times for real-time workloads. They might miss a deadline due
> to one of these IPIs. Make it possible to disable non-fatal MCE errors
> checking with a new Kconfig option (MCE_NONFATAL).
>
> Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxx>
LGTM.
Reviewed-by: Alejandro Vallejo <alejandro.garciavallejo@xxxxxxx>
Cheers,
Alejandro
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