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Re: [PATCH v2 3/7] xen/page_alloc: Add static per-NUMA-node counts of free pages
- To: Bernhard Kaindl <bernhard.kaindl@xxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Tue, 26 Aug 2025 10:27:31 +0200
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Julien Grall <julien@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Alejandro Vallejo <alejandro.garciavallejo@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Tue, 26 Aug 2025 08:27:40 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 16.08.2025 13:19, Bernhard Kaindl wrote:
> The static per-NUMA-node count of free pages is the sum of free memory
> in all zones of a node. It's an optimisation to avoid doing that operation
> frequently in the following patches that introduce per-NUMA-node claims.
>
> ---
> Changed since v1:
> - Added ASSERT(per_node_avail_pages[node] >= request) as requested
> during review by Roger: Comment by me: As we have
> ASSERT(avail[node][zone] >= request);
> directly before it, request is already valid, so this checks
> that per_node_avail_pages[node] is not mis-accounted too low.
Okay, this addresses Roger's comment. What about mine, though?
> Signed-off-by: Bernhard Kaindl <bernhard.kaindl@xxxxxxxxx>
> Signed-off-by: Alejandro Vallejo <alejandro.garciavallejo@xxxxxxx>
Apart from similar concerns as for patch 2, these come too late. They
wouldn't end up in the commit message, due to the earlier --- separator.
Given the problems with the first three patches I'm going to stop review
here, expecting a tidied v3 to be submitted with all prior review
comments addressed (verbally or by respective adjustments).
Jan
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