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

Chris Wilson
2018-12-31T09:22:50Z

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@chris-wilson.co.uk>
---
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