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Re: [PATCH v2 2/2] xen/mm: reject XENMEM_claim_pages when using LLC coloring
- To: Roger Pau Monne <roger.pau@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Wed, 24 Dec 2025 20:33:48 +0000
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>
- Delivery-date: Wed, 24 Dec 2025 20:34:05 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 24/12/2025 7:40 pm, Roger Pau Monne wrote:
> The coloring allocator ignores claims, reject the usage of the hypercall if
Minor grammar nit. You want a semicolon here rather than a comma.
> LLC coloring is enabled. Note that the usage of alloc_color_heap_page() is
> selected at boot time, and it's a system wide decision. Once enabled all
> domains will use alloc_color_heap_page() for allocations, which ignores any
> outstanding claims.
>
> The hypercall can be enabled if/when LLC coloring is adjusted to support
> claims.
>
> Fixes: 95debe51a936 ("xen: add cache coloring allocator for domains")
> Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
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