Re: [PATCH] mm/gup: fix always draining LRU caches in collect_longterm_unpinnable_folios()

[David Hildenbrand (Arm)]

On 8/1/26 21:20, Andrew Morton wrote:
> On Sat, 1 Aug 2026 11:49:39 -0700 (PDT) Hugh Dickins <hughd@xxxxxxxxxx> wrote:
> 
>>> Found by code inspection. If someone has a testcase that can easily
>>> trigger this and result in migration problems, please test! But this
>>> change seems to be "obvious the right thing to do".
>>
>> Sorry, I don't (as perhaps is too obvious). And I'm a wee bit afraid
>> that some of the problems which those changes happened to succeed in
>> fixing, might now reappear once the drains are finely targeted.
>>
>> Am I arguing for a delay before advancing to stable?  Perhaps, but
>> I think not: it's probably best to get that working as intended,
>> then deal with any fallout if it arises: just be on guard.
> 
> This patch is in mm-new, so it's still some months away from -stable
> eligibility.

I hope you meant weeks :)

Can we get that into 7.3-rc1, though? There is quite the overlap with
guest_memfd work, and I'll send another patch that depends on this.

-- 
Cheers,

David