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author | 2017-10-13 21:26:16 +0100 | |
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committer | 2017-10-16 20:44:19 +0100 | |
commit | 3d574a6bbb12a6c3bbeea807a1724b44a0f6ebbb (patch) | |
tree | 03aab19734eab1742c772553d93c71c759609ced /tools/perf/scripts/python/export-to-postgresql.py | |
parent | drm/i915: Drop debugfs/i915_gem_pin_display (diff) | |
download | linux-dev-3d574a6bbb12a6c3bbeea807a1724b44a0f6ebbb.tar.xz linux-dev-3d574a6bbb12a6c3bbeea807a1724b44a0f6ebbb.zip |
drm/i915: Remove walk over obj->vma_list for the shrinker
In the next patch, we want to reduce the lock coverage within the
shrinker, and one of the dangerous walks we have is over obj->vma_list.
We are only walking the obj->vma_list in order to check whether it has
been permanently pinned by HW access, typically via use on the scanout.
But we have a couple of other long term pins, the context objects for
which we currently have to check the individual vma pin_count. If we
instead mark these using obj->pin_display, we can forgo the dangerous
and sometimes slow list iteration.
v2: Rearrange code to try and avoid confusion from false associations
due to arrangement of whitespace along with rebasing on obj->pin_global.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171013202621.7276-4-chris@chris-wilson.co.uk
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