Commits
Chris Wilson committed f3f6184c5fa
drm/i915: Tidy generation of the GTT mmap offset If we make the observation that mmap-offsets are only released when we free an object, we can then deduce that the shrinker only creates free space in the mmap arena indirectly by flushing the request list and freeing expired objects. If we combine this with the lockless vma-manager and lockless idling, we can avoid taking our big struct_mutex until we need to actually free the requests. One side-effect is that we defer the madvise checking until we need the pages (i.e. the fault handler). This brings us into line with the other delayed checks (and madvise in general). v2: s/ret/err/ and use if (!err) rather than if (ret == 0) Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1470388464-28458-9-git-send-email-chris@chris-wilson.co.uk