On 10/24/2024 08:18, Nirmoy Das wrote:
Flush xe ordered_wq in case of ufence timeout which is observed on LNL and that points to the recent scheduling issue with E-cores.
This is similar to the recent fix: commit e51527233804 ("drm/xe/guc/ct: Flush g2h worker in case of g2h response timeout") and should be removed once there is E core scheduling fix.
v2: Add platform check(Himal) s/__flush_workqueue/flush_workqueue(Jani)
Cc: Badal Nilawar badal.nilawar@intel.com Cc: Jani Nikula jani.nikula@intel.com Cc: Matthew Auld matthew.auld@intel.com Cc: John Harrison John.C.Harrison@Intel.com Cc: Himal Prasad Ghimiray himal.prasad.ghimiray@intel.com Cc: Lucas De Marchi lucas.demarchi@intel.com Cc: stable@vger.kernel.org # v6.11+ Link: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/2754 Suggested-by: Matthew Brost matthew.brost@intel.com Signed-off-by: Nirmoy Das nirmoy.das@intel.com Reviewed-by: Matthew Brost matthew.brost@intel.com
drivers/gpu/drm/xe/xe_wait_user_fence.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
diff --git a/drivers/gpu/drm/xe/xe_wait_user_fence.c b/drivers/gpu/drm/xe/xe_wait_user_fence.c index f5deb81eba01..78a0ad3c78fe 100644 --- a/drivers/gpu/drm/xe/xe_wait_user_fence.c +++ b/drivers/gpu/drm/xe/xe_wait_user_fence.c @@ -13,6 +13,7 @@ #include "xe_device.h" #include "xe_gt.h" #include "xe_macros.h" +#include "compat-i915-headers/i915_drv.h" #include "xe_exec_queue.h" static int do_compare(u64 addr, u64 value, u64 mask, u16 op) @@ -155,6 +156,19 @@ int xe_wait_user_fence_ioctl(struct drm_device *dev, void *data, } if (!timeout) {
if (IS_LUNARLAKE(xe)) {/** This is analogous to e51527233804 ("drm/xe/guc/ct: Flush g2h* worker in case of g2h response timeout")** TODO: Drop this change once workqueue scheduling delay issue is* fixed on LNL Hybrid CPU.*/flush_workqueue(xe->ordered_wq);
If we are having multiple instances of this workaround, can we wrap them up in as 'LNL_FLUSH_WORKQUEUE(q)' or some such? Put the IS_LNL check inside the macro and make it pretty obvious exactly where all the instances are by having a single macro name to search for.
John.
err = do_compare(addr, args->value, args->mask, args->op);if (err <= 0)break;} err = -ETIME; break;