[Intel-gfx] [PATCH i-g-t v2] igt_core: Skip sync when listing subtests

[Chris Wilson]

Quoting Tvrtko Ursulin (2017-09-05 11:38:58)
> From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> 
> No need to sync filesystems when only listing subtest.
> 
> Extremely marginal benefit of avoid a short stall after make
> followed by listing subtests.
> 
> v2: Move sync to common_init for consolidation and simplicity.
>     (Chris Wilson)
> 
> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>

sync() would also be useful between subtests, exit_subtest() along with
a variety of other cleanup handlers.
-Chris