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Re: [PATCH] x86/mcheck: keep the banks past the end of the CMCI map polled
- To: Stefano Stabellini <stefano.stabellini@xxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Tue, 27 Oct 2026 12:49:14 +0100
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- Cc: andrew.cooper3@xxxxxxxxxx, roger@xxxxxxxxxxxxxx, teddy.astie@xxxxxxxxxx, jason.andryuk@xxxxxxx, Roger Pau Monné <roger.pau@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Tue, 27 Oct 2026 11:49:21 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 27.10.2026 01:13, Stefano Stabellini wrote:
> bitmap_copy() copies whole words, so in set_poll_bankmask() it clears
> the banks past the end of the CMCI map that bitmap_fill() had just set,
> leaving them neither polled nor reported by CMCI. Set those bits after
> the copy instead.
May I suggest
"bitmap_copy() copies whole words, so in set_poll_bankmask() it may clear
banks past the end of the CMCI map that bitmap_fill() may just have set,
leaving them neither polled nor reported by CMCI. Set those bits after
the copy instead."
> Fixes: 560cf418c845 ("x86/mcheck: allow varying bank counts per CPU")
> Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxx>
> Reviewed-by: Jason Andryuk <jason.andryuk@xxxxxxx>
> Acked-by: Roger Pau Monné <roger.pau@xxxxxxx>
No further tags needed, as it looks.
Jan
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