AMD General
Reviewed-by: Michael Chen <[email protected]>
________________________________
From: Liang, Prike <[email protected]>
Sent: Friday, August 7, 2026 6:10 AM
To: [email protected] <[email protected]>
Cc: Deucher, Alexander <[email protected]>; Koenig, Christian
<[email protected]>; Chen, Michael <[email protected]>; Liang, Prike
<[email protected]>
Subject: [PATCH] drm/amdgpu/mes11: disable MES RS64 process/gang context loading
The MES RS64 local memory process/gang context index may be updated,
saved, or restored improperly during queue eviction and restore cycles.
Enabling RS64 memory for MES process/gang context loading introduces
two known issues:
1. Performance regression on userq due to improper context index
handling during RS64 memory access.
2. KFDIPCTest.BasicTest failure on Navi31/32/33: the IPC buffer
GPU VA mapping is not correctly reflected in the restored RS64
process context, causing GPU page faults on the IPC shared
buffer address, which eventually leads to MES firmware becoming
unresponsive and requiring a full GPU reset to recover.
Temporarily disable MES RS64 process/gang context loading until both
issues are resolved.
Signed-off-by: Prike Liang <[email protected]>
---
drivers/gpu/drm/amd/amdgpu/mes_v11_0.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
b/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
index a0b874c9ee7b..c57bcb9a98b1 100644
--- a/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
@@ -1954,7 +1954,7 @@ static int mes_v11_0_hw_init(struct amdgpu_ip_block
*ip_block)
if (adev->mes.ring[0].sched.ready)
goto out;
- adev->mes.use_rs64mem = true;
+ adev->mes.use_rs64mem = false;
if (!adev->enable_mes_kiq) {
if (adev->firmware.load_type == AMDGPU_FW_LOAD_DIRECT) {
--
2.34.1
