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

[Andrew Morton]

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

c) Stick with my original plan.

<checks>

The cc:stable "mm/hugetlb: fix excessive IPI broadcasts when unsharing
PMD tables using mmu_gather" has dependencies on the preceding two
non-cc:stable patches.

So I'm thinking I add cc:stable to everything and send the whole series
into 6.19-rcX.  wdyt?


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.

?