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authorMaarten Lankhorst <maarten.lankhorst@ubuntu.com>2015-02-26 11:54:03 +0100
committerMaarten Lankhorst <dev@mblankhorst.nl>2015-03-13 20:26:33 +0100
commit5ea6f1c32628887c9df0c53bc8c199eb12633fec (patch)
treef466d5ed08d547ebb20da6ccc6fa1cbb2efc3785 /tests/modetest
parent7caa442e761ab5e48698c937aea9ce18f4522ecb (diff)
nouveau: make nouveau importing global buffers completely thread-safe, with tests
While I've closed off most races in a previous patch, a small race still existed where importing then unreffing cound cause an invalid bo. Add a test for this case. Racing sequence fixed: - thread 1 releases bo, refcount drops to zero, blocks on acquiring nvdev->lock. - thread 2 increases refcount to 1. - thread 2 decreases refcount to zero, blocks on acquiring nvdev->lock. At this point the 2 threads will clean up the same bo. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@ubuntu.com> Reviewed-By: Emil Velikov <emil.l.velikov@gmail.com>
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