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RE: [PATCH][4.17] x86/NUMA: correct off-by-1 in node map population
- To: Jan Beulich <jbeulich@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Henry Wang <Henry.Wang@xxxxxxx>
- Date: Tue, 4 Oct 2022 11:21:17 +0000
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Delivery-date: Tue, 04 Oct 2022 11:21:45 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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- Thread-topic: [PATCH][4.17] x86/NUMA: correct off-by-1 in node map population
Hi Jan,
> -----Original Message-----
> From: Jan Beulich <jbeulich@xxxxxxxx>
> Subject: [PATCH][4.17] x86/NUMA: correct off-by-1 in node map population
>
> As it turns out populate_memnodemap() so far "relied" on
> extract_lsb_from_nodes() setting memnodemapsize one too high in edge
> cases. Correct the issue there as well, by changing "epdx" to be an
> inclusive PDX and adjusting the respective relational operators.
>
> While there also limit the scope of both related variables.
>
> Fixes: b1f4b45d02ca ("x86/NUMA: correct off-by-1 in node map size
> calculation")
> Reported-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Thanks for the patch.
IIUC this patch is for a regression that we must fix for the 4.17, so:
Release-acked-by: Henry Wang <Henry.Wang@xxxxxxx>
Kind regards,
Henry
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