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Date:      Mon, 08 Feb 2021 22:25:01 -0800
From:      Alastair Hogge <agh@riseup.net>
To:        Hans Petter Selasky <hps@selasky.org>
Cc:        Emmanuel Vadot <manu@bidouilliste.com>, Steve Kargl <sgk@troutmask.apl.washington.edu>, Andriy Gapon <avg@freebsd.org>, freebsd-current@freebsd.org, freebsd-x11@freebsd.org
Subject:   Re: panic in drm or vt or deadlock on mutex or ...
Message-ID:  <952bac7c2d593e175c0733bb542eb0ff@riseup.net>
In-Reply-To: <fea61694-367d-7161-e071-4a8f77810a68@selasky.org>
References:  <20210203050828.GA21823@troutmask.apl.washington.edu> <4581b83f-e048-fb8b-edfe-44332d3dc460@FreeBSD.org> <20210203160324.GA23963@troutmask.apl.washington.edu> <20210204105029.5fc11bed5df0e4283f983fbf@bidouilliste.com> <36a5927f9992ec828a0fe1e9bf480ce3@riseup.net> <fea61694-367d-7161-e071-4a8f77810a68@selasky.org>

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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



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