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It is possible for us to be forced to perform an allocation for the lazy request whilst running the shrinker. This allocation may fail, leaving us unable to reclaim any memory leading to premature OOM. A neat solution to the problem is to preallocate the request at the same time as acquiring the seqno for the ring transaction. This means that we can report ENOMEM prior to touching the rings. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> |
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