unkillable process consuming 100% cpu

[Steve Kargl]

On Tue, Nov 12, 2019 at 06:48:22PM +0100, Hans Petter Selasky wrote:
> On 2019-11-12 18:31, Steve Kargl wrote:
> >> Can you open the radeonkms.ko in gdb83 from ports and type:
> >>
> >> l *(radeon_gem_busy_ioctl+0x30)
> >>
> > % /boot/modules/radeonkms.ko
> > (gdb) l  *(radeon_gem_busy_ioctl+0x30)
> > 0xa12b0 is in radeon_gem_busy_ioctl (/usr/ports/graphics/drm-current-kmod/work/kms-drm-2d2852e/drivers/gpu/drm/radeon/radeon_gem.c:453).
> > 448     /usr/ports/graphics/drm-current-kmod/work/kms-drm-2d2852e/drivers/gpu/drm/radeon/radeon_gem.c: No such file or directory.
> > (gdb)
> 
> Like expected.
> 

I installed the 2nd seqlock.diff, rebuilt drm-current-kmod-4.16.g20191023,
rebooting, and have been pounding on the system with workloads that are
similar to what the system was doing during the lockups.  So far, I
cannot ge the system lock-up.  Looks like your patch fixes (or at 
least helps).  Thanks for taking a look at the problem.

-- 
Steve