[0/2] shmem, drm/i915: Mark pinned shmemfs pages as unevictable

Message

Kuo-Hsin Yang Oct. 16, 2018, 5:42 p.m. UTC

When a graphics heavy application is running, i915 driver may pin a lot
of shmemfs pages and vmscan slows down significantly by scanning these
pinned pages. This patch is an alternative to the patch by Chris Wilson
[1]. As i915 driver pins all pages in an address space, marking an
address space as unevictable is sufficient to solve this issue.

[1]: https://patchwork.kernel.org/patch/9768741/

Kuo-Hsin Yang (2):
  shmem: export shmem_unlock_mapping
  drm/i915: Mark pinned shmemfs pages as unevictable

 Documentation/vm/unevictable-lru.rst | 4 +++-
 drivers/gpu/drm/i915/i915_gem.c      | 8 ++++++++
 mm/shmem.c                           | 2 ++
 3 files changed, 13 insertions(+), 1 deletion(-)