Chris Wilson c46f3c341c igt/gem_concurrent_blit: Purge the libdrm caches before cloning
When forking, the entire VM is cloned including the VMA backed by GEM
objects from the libdrm buffer cache. This is not only slow, but can also
cause the system to exceed the maximum number of VMA and premature test
failure.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
2016-04-10 20:49:26 +01:00
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