On Wed, Sep 19, 2018 at 09:54:32PM +0100, Chris Wilson wrote: > Stolen memory is lost across S4 (hibernate) or S3-RST as it is a portion > of ordinary volatile RAM. As we allocate our rings from stolen, this may > include the rings used for our preempt context and their breadcrumb > instructions. In order to allow preemption following hibernation and > loss of stolen memory, we therefore need to repopulate the instructions > inside the lost ring upon resume. To handle both module load and resume, > we simply defer constructing the ring to first use. > > Testcase: igt/drv_selftest/live_gem > Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > Cc: Michał Winiarski <michal.winiarski@xxxxxxxxx> > Cc: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx> Reviewed-by: Michał Winiarski <michal.winiarski@xxxxxxxxx> -Michał > --- > drivers/gpu/drm/i915/intel_guc_submission.c | 80 +++++++-------------- > 1 file changed, 27 insertions(+), 53 deletions(-) _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
