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

Sorry, please ignore previous reply, the modified sysctl is still
running,
the output earlier, was from the stock binary.

On 2021-02-09 14:25, Alastair Hogge wrote:
> 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