Re: [PATCH RFC v2 00/18] mm/virtio: skip redundant zeroing of host-zeroed reported pages

[David Hildenbrand (Arm)]

On 4/21/26 16:15, Michael S. Tsirkin wrote:
> On Tue, Apr 21, 2026 at 12:04:49PM +0200, David Hildenbrand (Arm) wrote:
>> On 4/21/26 04:38, Gregory Price wrote:
>>>
>>> Why does it need to propogate?
>>>
>>> Can we leave folio_zero_user() callers the same, but add a PG_zeroed
>>> check in folio_zero_user() that skips the zeroing (but not the cache
>>> flush) and clear the PG_zeroed bit?
>>
>> folio_zero_user() is just an abomination, really.
> 
> We can't completely replace it with GFP_ZERO though e.g. because hugetlbfs
> has its own pool and needs to zero that.

Right, hugetlb will have to keep using it for now.

-- 
Cheers,

David