diff options
| author | Xiong Zhang <xiong.y.zhang@intel.com> | 2018-02-26 10:40:18 +0800 |
|---|---|---|
| committer | Zhi Wang <zhi.a.wang@intel.com> | 2018-03-09 21:53:18 +0800 |
| commit | b24881e0b0b69155b092c525b7fded258d78a46d (patch) | |
| tree | b73a4f343f1e820d4818c3b47533e2a039988352 /tools/perf/scripts/python/parallel-perf.py | |
| parent | 88d3dfb6a69042381161290c7ce19e1f53fc2a66 (diff) | |
| download | kernel-b24881e0b0b69155b092c525b7fded258d78a46d.tar.gz | |
drm/i915/gvt: Add runtime_pm_get/put into gvt_switch_mmio
If user continuously create vgpu, boot guest, shoutdown guest and destroy
vgpu from remote, the following calltrace exists in dmesg sometimes:
[ 6412.954721] RPM wakelock ref not held during HW access
[ 6412.954795] WARNING: CPU: 7 PID: 11941 at
linux/drivers/gpu/drm/i915/intel_drv.h:1800
intel_uncore_forcewake_get.part.7+0x96/0xa0 [i915]
[ 6412.954915] Call Trace:
[ 6412.954951] intel_uncore_forcewake_get+0x18/0x20 [i915]
[ 6412.954989] intel_gvt_switch_mmio+0x8e/0x770 [i915]
[ 6412.954996] ? __slab_free+0x14d/0x2c0
[ 6412.955001] ? __slab_free+0x14d/0x2c0
[ 6412.955006] ? __slab_free+0x14d/0x2c0
[ 6412.955041] intel_vgpu_stop_schedule+0x92/0xd0 [i915]
[ 6412.955073] intel_gvt_deactivate_vgpu+0x48/0x60 [i915]
[ 6412.955078] __intel_vgpu_release+0x55/0x260 [kvmgt]
when this happens, gvt_switch_mmio is called at vgpu destroy, host i915 is
idle and doesn't hold RPM wakelock, igd is in powersave mode, but
gvt_switch_mmio require igd power on to access register, so
intel_runtime_pm_get should be added to make sure igd power on before
gvt_switch_mmio.
v2: Move runtime_pm_get/put into gvt_switch_mmio.(Zhenyu)
Signed-off-by: Xiong Zhang <xiong.y.zhang@intel.com>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Diffstat (limited to 'tools/perf/scripts/python/parallel-perf.py')
0 files changed, 0 insertions, 0 deletions