drm/i915/gem: Limit struct_mutex to eb_reserve

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We only need to serialise the multiple pinning during the eb_reserve
phase. Ideally this would be using the vm->mutex as an outer lock, or
using a composite global mutex (ww_mutex), but at the moment we are
using struct_mutex for the group.

Closes: https://gitlab.freedesktop.org/drm/intel/issues/1381
Fixes: 003d8b9143 ("drm/i915/gem: Only call eb_lookup_vma once during execbuf ioctl")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200306071614.2846708-3-chris@chris-wilson.co.uk

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This commit is contained in:

Chris Wilson 2020-03-06 07:16:14 +00:00

parent 26fc4e4ba1

commit ef398881d2

2 changed files with 20 additions and 37 deletions

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51

drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c

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6

drivers/gpu/drm/i915/i915_drv.h

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