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Re: [PATCH v3 12/12] x86/shadow: adjust monitor table prealloc amount
- To: Jan Beulich <jbeulich@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Fri, 20 Feb 2026 15:16:54 +0000
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Tim Deegan <tim@xxxxxxx>
- Delivery-date: Fri, 20 Feb 2026 15:17:10 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 16/05/2023 8:42 am, Jan Beulich wrote:
> While 670d6b908ff2 ('x86 shadow: Move the shadow linear mapping for
> n-on-3-on-4 shadows so') bumped the amount by one too little for the
> 32-on-64 case (which luckily was dead code, and hence a bump wasn't
> necessary in the first place), 0b841314dace ('x86/shadow:
> sh_{make,destroy}_monitor_table() are "even more" HVM-only'), dropping
> the dead code, then didn't adjust the amount back. Yet even the original
> amount was too high in certain cases. Switch to pre-allocating just as
> much as is going to be needed.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
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