Re: panic in drm or vt or deadlock on mutex or ...

On 2021-02-08 21:01, Hans Petter Selasky wrote:
> On 2/8/21 1:53 PM, Alastair Hogge wrote:
>> Boot to multi-user; login (getty):
>> $ doas kldload /boot/modules/amdgpu.ko
>> $ sysctl
>> [panic]
>>
>> ..is a guaranteed way to panic my system.
> 
> Hi,
> 
> Maybe you could do a hack and edit the sysctl source code:
> 
> 1) print the sysctl before it is queried.
> 2) sleep 1 second between print and query.
> 
> Should be easy to nail this down!

This is all I am able to catch via the ssh session:
vm.uma.sackhole.size: 32
vm.uma.hostcache.stats.xdomain: 0
vm.uma.hostcache.stats.fails: 0
vm.uma.hostcache.stats.frees: 0
vm.uma.hostcache.stats.allocs: 0
vm.uma.hostcache.stats.current: 0
vm.uma.hostcache.domain.0.wss: 0
vm.uma.hostcache.domain.0.imin: 0
vm.uma.hostcache.domain.0.imax: 0
vm.uma.hostcache.domain.0.nitems: 0
vm.uma.hostcache.limit.bucket_max: 7680
vm.uma.hostcache.limit.sleeps: 0
vm.uma.hostcache.limit.sleepers: 0
vm.uma.hostcache.limit.max_items: 15360
vm.uma.hostcache.limit.items: 0
vm.uma.hostcache.keg.domain.0.free_items: 0
vm.uma.hostcache.keg.domain.0.pages: 0
vm.uma.hostcache.keg.efficiency: 98
vm.uma.hostcache.keg.reserve: 0
vm.uma.hostcache.keg.align: 7
vm.uma.hostcache.keg.ipers: 42
vm.uma.hostcache.keg.ppera: 1
vm.uma.hostcache.keg.rsize: 96
vm.uma.hostcache.keg.name: hostcache
vm.uma.hostcache.bucket_size_max: 120
vm.uma.hostcache.bucket_size: 120
vm.uma.hostcache.flags: 0x43010000<TRASH,LIMIT,CTORDTOR,FIRSTTOUCH>
vm.uma.hostcache.size: 96
vm.uma.syncache.stats.xdomain: 0
vm.uma.syncache.stats.fails: 0
vm.uma.syncache.stats.frees: 1
vm.uma.syncache.stats.allocs: 1
vm.uma.syncache.stats.current: 0
vm.uma.syncache.domain.0.wss: 3
vm.uma.syncache.domain.0.imin: 0
vm.uma.syncache.domain.0.imax: 0
vm.uma.syncache.domain.0.nitems: 0