On 2018-12-20 9:06 a.m., Tom St Denis wrote: > On 2018-12-20 6:45 a.m., Mikhail Gavrilov wrote: >> On Thu, 20 Dec 2018 at 16:17, StDenis, Tom <Tom.StDenis@xxxxxxx> wrote: >>> >>> Well yup the kernel is not letting you open the files: >>> >>> >>> As sudo/root you should be able to open these files with umr. What >>> happens if you just open a shell as root and run it? >>> >> >> [root@localhost ~]# touch /sys/kernel/debug/dri/0/amdgpu_ring_gfx >> [root@localhost ~]# cat /sys/kernel/debug/dri/0/amdgpu_ring_gfx >> cat: /sys/kernel/debug/dri/0/amdgpu_ring_gfx: Operation not permitted >> [root@localhost ~]# ls -laZ /sys/kernel/debug/dri/0/amdgpu_ring_gfx >> -r--r--r--. 1 root root system_u:object_r:debugfs_t:s0 8204 Dec 20 >> 16:31 /sys/kernel/debug/dri/0/amdgpu_ring_gfx >> [root@localhost ~]# getenforce >> Permissive >> [root@localhost ~]# /home/mikhail/packaging-work/umr/build/src/app/umr >> -O verbose,halt_waves -wa >> Cannot seek to MMIO address: Bad file descriptor >> [ERROR]: Could not open ring debugfs fileSegmentation fault (core dumped) >> >> I am already tried launch `umr` under root user, but kernel don't let >> open `amdgpu_ring_gfx` again. >> >> What else kernel options I should to check? >> >> I am also attached current kernel config to this message. > > I can replicate this by doing > > chmod u+s umr > sudo ./umr -R gfx[.] > > You need to remove the u+s bit you are literally not running umr as root! Actually disregard that. I'm confused at this point. I run umr 100s of times a day on my devel box just fine as root. Let me fiddle and see if I can sort this out. Tom
