On Mon, Aug 17, 2026 at 4:07 AM Lazar, Lijo <[email protected]> wrote: > > > > On 16-Aug-26 10:56 PM, Priya Hosur wrote: > > This patch adds heavy-weight TLB flush after MES queue eviction/suspension > > to fix SVM page migration hangs on gfx1151 with XNACK mode enabled. > > > > v4: > > - Dropped userq TLB flush patch per Felix/Lijo feedback: TLB flush is > > only > > needed after batch unmap in amdgpu_userq_unmap_all(), not per-queue > > unmap > > > > Sorry, that was not the intention. I was thinking there is a unmap_all > API in MES in which case this could be done within FW itself instead. >
There is a suspend_all and I believe the reset detect and detect_and_reset calls end up suspending all queues the type specified (gfx, compute, sdma). > I believe Alex was also asking to check about batch unmap cases of user > queue. Ex: - amdgpu_eviction_fence_suspend_worker there could still be > inflight transactions similar to KFD case. RIght. When we evict a KGD userq process, we evict all of the queues for that GPU VM. Alex > > Thanks, > Lijo > > > v3: > > - Split into 2 patches per Alex's review > > - Added userq TLB flush in amdgpu_userq_unmap_helper() (amdgpu_userq.c) > > > > v2: > > - Removed "SDMA" from comment as this affects all in-flight memory > > accesses, not just SDMA (Felix Kuehling) > > - Added Reviewed-by tag > > > > Priya Hosur (1): > > drm/amdkfd: Add TLB flush after MES queue eviction/suspension > > > > .../drm/amd/amdkfd/kfd_device_queue_manager.c | 10 ++++++++++ > > 1 file changed, 10 insertions(+) > > >
