[PATCH 00/13] mm: batch of (urgentish?) fixes in oomk, cachestat, dev-migrate, percpu

["Lorenzo Stoakes (ARM)" <ljs@kernel.org>]

A bunch of fixes for oomk, cachestat, device migration and the per-CPU
allocator.

These patches were originally AI-generated, tamed into upstreamable state.

Some are more reworked than others. Those which needed a significant
rethink are submitted as mine and marked as Reported-by the relevant
original author, others are smaller edits which are annotated as such in
the usual fashion.

Please check for correctness, sanity, and whether the cc: stable is
warranted (I have not included it for 3 where it seemed unwarranted.)

Signed-off-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
---
Chris Mason (5):
      mm: cachestat: count each page only once
      mm: cachestat: restart the walk after each entry
      mm/migrate_device: fix ksmd oops on a migrated KSM page
      mm/migrate_device: refuse to migrate shadow stacks
      percpu: queue the balance work on an unbound workqueue

Josef Bacik (4):
      mm/migrate_device: allocate THP deferred split heads
      mm/migrate_device: don't collect a range twice
      mm/migrate_device: don't let go of the fault page
      mm/migrate_device: look up fault folio after a split

Lorenzo Stoakes (ARM) (4):
      mm/mmap: free gathered pages before MMF_OOM_SKIP
      mm/migrate_device: fix use-after-free of the anon rmap
      percpu: fix contig hints that are too low
      percpu: search the whole reserved chunk

 include/linux/migrate.h  |   1 +
 include/linux/mm_types.h |   2 +
 include/linux/oom.h      |   9 ++++
 mm/filemap.c             |  21 ++++++---
 mm/migrate_device.c      | 111 ++++++++++++++++++++++++++++++++---------------
 mm/mmap.c                |   9 +++-
 mm/oom_kill.c            |   4 +-
 mm/percpu.c              |  69 +++++++++--------------------
 8 files changed, 136 insertions(+), 90 deletions(-)
---
base-commit: 7f04048247a69019ccaa9c152002d3601b19453c
change-id: 20261107-mason-migrate-et-al-fixes-0494d34884c4

Cheers,
-- 
Lorenzo Stoakes (ARM) <ljs@kernel.org>