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Re: [PATCH 7/9] x86/mwait-idle: drop const from struct cpuidle_state arrays
- To: Roger Pau Monné <roger.pau@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 4 May 2026 11:14:25 +0200
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- Cc: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Delivery-date: Mon, 04 May 2026 09:14:34 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 24.04.2026 19:57, Roger Pau Monné wrote:
> On Thu, Mar 12, 2026 at 05:57:18PM +0100, Jan Beulich wrote:
>> A subsequent change will want to be able to alter them based on a new
>> command line option. (Note that some were __ro_after_init already.)
>>
>> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
>
> I wonder if we could also move all the cstate tables to .init section,
> as after boot we would only use one of those.
I think we could, at the price of introducing a compile-time upper bound
to the size of those arrays. We'd need to copy the one we want to use at
runtime, and hence we'd need to reserve enough space (or use a runtime
allocation).
> Anyway, for the change
> here:
>
> Acked-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
Thanks.
Jan
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