On Thu, Oct 24, 2024 at 01:44:41PM +0200, Nirmoy Das wrote:
>
> On 10/24/2024 1:59 AM, Matthew Brost wrote:
> > drm_gpu_scheduler.submit_wq is used to submit jobs, jobs are in the path
> > of dma-fences, and dma-fences are in the path of reclaim. Mark scheduler
> > work queue with WQ_MEM_RECLAIM to ensure forward progress during
> > reclaim; without WQ_MEM_RECLAIM, work queues cannot make forward
> > progress during reclaim.
> >
> > v2:
> > - Fixes tags (Philipp)
> > - Reword commit message (Philipp)
> >
> > Cc: Luben Tuikov <ltuikov89@xxxxxxxxx>
> > Cc: Danilo Krummrich <dakr@xxxxxxxxxx>
> > Cc: Philipp Stanner <pstanner@xxxxxxxxxx>
> > Cc: stable@xxxxxxxxxxxxxxx
> > Fixes: 34f50cc6441b ("drm/sched: Use drm sched lockdep map for submit_wq")
> > Fixes: a6149f039369 ("drm/sched: Convert drm scheduler to use a work queue rather than kthread")
> > Signed-off-by: Matthew Brost <matthew.brost@xxxxxxxxx>
>
> Acked-by: Nirmoy Das <nirmoy.das@xxxxxxxxx>
>
> Looks like Xe has a dependency on this now that xe->ordered_wq is allocated with WQ_MEM_RECLAIM flag:
>
Thanks for pointing this out.
I merged the Xe patches first not realizing this was going to break CI.
Hopefully I can merge this scheduler patch soon.
Matt
> https://intel-gfx-ci.01.org/tree/intel-xe/xe-pw-140135v2/bat-lnl-1/igt@xe_exec_fault_mode@xxxxxxxxxxxxxxxxxxxxxxxx
>
> > ---
> > drivers/gpu/drm/scheduler/sched_main.c | 5 +++--
> > 1 file changed, 3 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
> > index 540231e6bac6..df0a5abb1400 100644
> > --- a/drivers/gpu/drm/scheduler/sched_main.c
> > +++ b/drivers/gpu/drm/scheduler/sched_main.c
> > @@ -1283,10 +1283,11 @@ int drm_sched_init(struct drm_gpu_scheduler *sched,
> > sched->own_submit_wq = false;
> > } else {
> > #ifdef CONFIG_LOCKDEP
> > - sched->submit_wq = alloc_ordered_workqueue_lockdep_map(name, 0,
> > + sched->submit_wq = alloc_ordered_workqueue_lockdep_map(name,
> > + WQ_MEM_RECLAIM,
> > &drm_sched_lockdep_map);
> > #else
> > - sched->submit_wq = alloc_ordered_workqueue(name, 0);
> > + sched->submit_wq = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM);
> > #endif
> > if (!sched->submit_wq)
> > return -ENOMEM;
