Re: [PATCH v3 0/2] mm/huge_memory: fix the copy of special PMDs at fork

[Lance Yang <lance.yang@linux.dev>]

On 2026/10/14 23:57, Zi Yan wrote:
> On 14 Oct 2026, at 11:46, Konstantin Khorenko wrote:
> 
> <snip>
> 
>>
>>
>> Signed-off-by: Konstantin Khorenko <khorenko@virtuozzo.com>
>> ---
>> Changes in v3:
>> - Patch 1: recheck the PMD with pmd_none(), as only a zap can change
>>    it and a zap leaves it none (Lance Yang).
>> - Link to v2: https://patch.msgid.link/20261014-b4-prep-vstor-149847-copy_huge_pmd-recheck-special-pmd-v2-0-e1548488fa68@virtuozzo.com
>>
>> Changes in v2:
>> - Add patch 2, the page table deposit for ppc64 hash, reported by
>>    Sashiko.
>> - Patch 1: name panthor instead of drm_gem_shmem as the driver whose
>>    stale child mapping reaches freed pages: drm_gem_shmem keeps the
>>    pages of a purged object until the last mapping goes away.
>> - Link to v1: https://patch.msgid.link/20261014-b4-prep-vstor-149847-copy_huge_pmd-recheck-special-pmd-v1-1-d225c60bc316@virtuozzo.com
>>
> 
> Please stop sending new versions of a patchset repeatedly.
> Wait at least a day for others to catch up.

+1

Please slow down a bit. You don't need to respin every few
hours. That just makes everyone start over ...

Post a version, wait for feedback, then revise. Twice a week
is plenty, honestly :)

Cheers, Lance

> Thanks.
> 
>> ---
>> Konstantin Khorenko (2):
>>        mm/huge_memory: recheck a special PMD under the lock in copy_huge_pmd()
>>        mm/huge_memory: deposit a page table for a special PMD copied by fork
>>
>>   mm/huge_memory.c | 34 +++++++++++++++++++++++++++-------
>>   1 file changed, 27 insertions(+), 7 deletions(-)
>> ---
>> base-commit: 24a19b953e2a3d0ea5a8c4951a0ab8f32720c907
>> change-id: 20261014-b4-prep-vstor-149847-copy_huge_pmd-recheck-special-pmd-bdf7efb612c2
>>
>> Best regards,
>> --
>> Konstantin Khorenko <khorenko@virtuozzo.com>
> 
> 
> Best Regards,
> Yan, Zi