Re: [PATCH v5 0/1] KVM: x86: fix some kvm period timer BUG

[fuqiang wang <fuqiang.wng@gmail.com>]

On 11/11/25 8:28 AM, Sean Christopherson wrote:
> On Fri, Nov 07, 2025, fuqiang wang wrote:
>> =================================
>> Fix both issues in a single patch
>> =================================
>>
>> In versions v2 and v3, I split these two issues into two separate patches
>> for fixing. However, this caused patch 2 to revert some of the changes made
>> by patch 1.
> 
> FWIW, my initial reaction was that I liked splitting this into two patches better,
> but after digging through all the angles of this for a few hours, I agree that it's
> better to skip the "don't let the delta go negative" patch, because that patch
> really only addresses a symptom that shouldn't happen in the first place.
> 
>> In patch 4, I attempted to merge the two patches into one and tried to
>> describe both issues in the commit message, but I did not do it well. In
>> this version, I have included more details in the commit message and the
>> cover letter.

Yes, the reason why I issued the “don’t let the delta go negative” patch
separately in v1 was that I hadn’t yet identified the root cause of the
hardlockup at that time...