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| author |   Kuo-Hsin Yang <vovoy@chromium.org> | 2019-01-08 15:45:17 +0800 |
|---|---|---|
| committer |   Chris Wilson <chris@chris-wilson.co.uk> | 2019-01-09 21:24:50 +0000 |
| commit | fb4b49278f6b2b83bc638d4082301f98581c3598 (patch) | |
| tree | d881b7b24a387bc29b4eb36bab1e4a24c9331616 /drivers/gpu/drm/omapdrm/omap_encoder.c | |
| parent | drm: make drm_framebuffer.h self contained (diff) | |
| download | linux-dev-fb4b49278f6b2b83bc638d4082301f98581c3598.tar.xz linux-dev-fb4b49278f6b2b83bc638d4082301f98581c3598.zip | |
drm/gem: Mark pinned pages as unevictable
The gem drivers use shmemfs to allocate backing storage for gem objects.
On Samsung Chromebook Plus, the drm/rockchip driver may call
rockchip_gem_get_pages -> drm_gem_get_pages -> shmem_read_mapping_page
to pin a lot of pages, breaking the page reclaim mechanism and causing
oom-killer invocation.
E.g. when the size of a zone is 3.9 GiB, the inactive_ratio is 5. If
active_anon / inactive_anon < 5 and all pages in the inactive_anon lru
are pinned, page reclaim would keep scanning inactive_anon lru without
reclaiming memory. It breaks page reclaim when the rockchip driver only
pins about 1/6 of the anon lru pages.
Mark these pinned pages as unevictable to avoid the premature oom-killer
invocation. See also similar patch on i915 driver [1].
[1]: https://patchwork.freedesktop.org/patch/msgid/20181106132324.17390-1-chris@chris-wilson.co.uk
Signed-off-by: Kuo-Hsin Yang <vovoy@chromium.org>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190108074517.209860-1-vovoy@chromium.org
Diffstat (limited to 'drivers/gpu/drm/omapdrm/omap_encoder.c')
0 files changed, 0 insertions, 0 deletions