On 9/10/24 9:42 PM, Andrew Morton wrote:
> On Tue, 10 Sep 2024 17:08:30 -0600 Jens Axboe <axboe@xxxxxxxxx> wrote:
>
>>> Fixes are in git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-stable
>>>
>>> c2a967f6ab0e mm/hugetlb_vmemmap: don't synchronize_rcu() without HVO
>>> c0f398c3b2cf mm/hugetlb_vmemmap: batch HVO work when demoting
>>>
>>> Additional improvements from mm-stable that may or may not help your test case:
>>>
>>> e98337d11bbd mm/contig_alloc: support __GFP_COMP
>>> 463586e9ff39 mm/cma: add cma_{alloc,free}_folio()
>>> cf54f310d0d3 mm/hugetlb: use __GFP_COMP for gigantic folios
>>
>> I didn't pick patches, just pulled all of mm-stable - yep that fixes it
>> for me, no longer spending 60+% of the runtime during exit. I trust
>> these are heading to stable?
>
> None of these are tagged for -stable backporting. We can later request
> a backport without the cc:stable tag, although narrowing down the
> required patches would be good.
These two:
c2a967f6ab0e mm/hugetlb_vmemmap: don't synchronize_rcu() without HVO
c0f398c3b2cf mm/hugetlb_vmemmap: batch HVO work when demoting
to cover both cases.
--
Jens Axboe
