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Re: [PATCH] x86: Add Kconfig option for log-dirty tracking
- To: Roger Pau Monné <roger.pau@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 9 Feb 2026 17:00:23 +0100
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- Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Alejandro Vallejo <alejandro.garciavallejo@xxxxxxx>
- Delivery-date: Mon, 09 Feb 2026 16:00:27 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 09.02.2026 16:44, Roger Pau Monné wrote:
> On Mon, Feb 09, 2026 at 11:31:15AM +0100, Alejandro Vallejo wrote:
>> --- a/xen/arch/x86/mm/paging.c
>> +++ b/xen/arch/x86/mm/paging.c
>> @@ -623,10 +623,12 @@ int paging_domain_init(struct domain *d)
>> INIT_PAGE_LIST_HEAD(&d->arch.paging.freelist);
>> mm_lock_init(&d->arch.paging.lock);
>>
>> +#ifdef CONFIG_LOG_DIRTY
>> /* This must be initialized separately from the rest of the
>> * log-dirty init code as that can be called more than once and we
>> * don't want to leak any active log-dirty bitmaps */
>> d->arch.paging.log_dirty.top = INVALID_MFN;
>> +#endif /* CONFIG_LOG_DIRTY */
>
> Could you possibly init this field from paging_log_dirty_init()? As
> to avoid having more ifdef churn in paging_domain_init().
Hmm, I was wondering the same, but then trusted the comment. Looks like it
may be stale, though.
Jan
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