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drm/i915: Process page flags once rather than per pwrite/pread

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We used to lock individual pages inside the buffer object and so needed
to update the page flags every time. However, we now pin the pages into
the object for the duration of the pwrite/pread (and hopefully much
longer) and so we can forgo the flag updates until we release all the
pages.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Brad Volkin <bradley.d.volkin@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson 2014-03-07 08:30:36 +00:00 committed by Daniel Vetter
parent 2fae6a860c
commit 17793c9a46
1 changed files with 2 additions and 7 deletions
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9
drivers/gpu/drm/i915/i915_gem.c
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@ -510,12 +510,10 @@ i915_gem_shmem_pread(struct drm_device *dev,
mutex_lock(&dev->struct_mutex);
next_page:
mark_page_accessed(page);
if (ret)
goto out;
next_page:
remain -= page_length;
user_data += page_length;
offset += page_length;
@ -831,13 +829,10 @@ i915_gem_shmem_pwrite(struct drm_device *dev,
mutex_lock(&dev->struct_mutex);
next_page:
set_page_dirty(page);
mark_page_accessed(page);
if (ret)
goto out;
next_page:
remain -= page_length;
user_data += page_length;
offset += page_length;