[Intel-gfx] [PATCH i-g-t] i915/gem_busy: Use a non-preemptible hanging batch

[Mika Kuoppala]

Chris Wilson <chris at chris-wilson.co.uk> writes:

> Ensure that the hangcheck notices the hanging batch by using a
> non-preemptible spin batch, as some future versions of hangcheck may
> allow a preemptible GPU hog to survive.
>
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

Reviewed-by: Mika Kuoppala <mika.kuoppala at linux.intel.com>

> ---
>  tests/i915/gem_busy.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/tests/i915/gem_busy.c b/tests/i915/gem_busy.c
> index 76b44a5d4..eb3d3ef2b 100644
> --- a/tests/i915/gem_busy.c
> +++ b/tests/i915/gem_busy.c
> @@ -427,7 +427,10 @@ static bool has_extended_busy_ioctl(int fd)
>  
>  static void basic(int fd, unsigned ring, unsigned flags)
>  {
> -	igt_spin_t *spin = igt_spin_batch_new(fd, .engine = ring);
> +	igt_spin_t *spin =
> +		igt_spin_batch_new(fd,
> +				   .engine = ring,
> +				   .flags = IGT_SPIN_NO_PREEMPTION);
>  	struct timespec tv;
>  	int timeout;
>  	bool busy;
> -- 
> 2.20.1
>
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