Re: [PATCH RESEND v3 0/4] mm/hugetlb: fixes for PMD table sharing (incl. using mmu_gather)

[Andrew Morton]

On Thu, 15 Jan 2026 20:40:13 +0100 "David Hildenbrand (Red Hat)" <david@xxxxxxxxxx> wrote:

> On 1/15/26 19:05, Andrew Morton wrote:
> > On Thu, 15 Jan 2026 17:22:30 +0000 Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx> wrote:
> > 
> >> Any update on this series? It's a hotfix series and I don't see it queued
> >> up anywhere in either mm-hotfixes-unstable or mm-hotfixes-stable, this
> >> issue is causing ongoing problems for a lot of people, is there any reason
> >> it's being delayed?
> >>
> >> It's received extensive approval and testing, so should be GTG right?
> > 
> > This has been in mm-unstable for a long time.  As the series had a
> > mixture of cc:stable and not-cc:stable patches, I figured we'd merge
> > them all into next merge window and let the -stable maintainers figure
> > it all out.
> > 
> > As this is more urgent than I believed, we need to figure out what to
> > do.
> > 
> > a) Pluck out the two cc:stable patches, merge just those into 6.19-rc.
> > 
> > b) Merge all of them into 6.19-rc, let -stable maintainers figure it out
> 
> Right. We can just CC: stable on comment fixes #2 and #3 to make 
> back-porting easier.

Yep.  Seems lame to be backporting comment fixes because real fixes
were textually dependent.  Also seems lame to retain known-wrong
comments in stable kernels!

> > 
> > 
> > Also, David, where do we stand with
> > 
> > : I'd love to get some generic hugetlb testing on arm64 and powerpc,
> > : that do hugetlb TLB flushing stuff a bit more special.
> > :
> > : I'll try doing some arm64 testing early in the new year myself.
> > 
> > ?
> 
> Not done yet, unfortunately. (I don't (yet) have easy access to decent 
> arm64 hardware ;) )
> 
> I still hope that Jann could quickly have a look, but it's been a while 
> already since I posted v1.

OK.  It may well have had the hoped-for testing in linux-next, only we
didn't hear about it.