mm: Xen PV regression after THP PTE optimization

[PATCH v2 0/1] mm: Xen PV regression after THP PTE optimization

Petr Vaněk posted 1 patch 6 months ago

Download series mbox

Failed in applying to current master (apply log)

There is a newer version of this series

mm/internal.h | 27 +++++++++++----------------
1 file changed, 11 insertions(+), 16 deletions(-)

Expand all Fold all

[PATCH v2 0/1] mm: Xen PV regression after THP PTE optimization

Posted by Petr Vaněk 6 months ago

Hi all,

I recently discovered an mm regression introduced in kernel version 6.9
that affects systems running as a Xen PV domain [1]. Original fix
proposal wasn't ideal, but it sparked a discussion which helped us
fully understand the root cause.

The new v2 patch contains changes based on David Hildenbrand's proposal
to cap max_nr to the number of PFNs that actually remain in the folio
and to clean up the loop.

Thanks,
Petr

[1] https://lore.kernel.org/lkml/20250429142237.22138-1-arkamar@atlas.cz

Petr Vaněk (1):
  mm: fix folio_pte_batch() on XEN PV

 mm/internal.h | 27 +++++++++++----------------
 1 file changed, 11 insertions(+), 16 deletions(-)

-- 
2.48.1