Date: Tue, 09 Mar 2021 00:31:55 -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: <942bb6f5190e5300492120c3aecdf874@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! Always panics at: $ /tmp/sysctl-with-delay -a [...] p1003_1b.mapped_files: 200112 p1003_1b.memlock: 0 p1003_1b.memlock_range: 0 p1003_1b.memory_protection: 0 p1003_1b.message_passing: 0 p1003_1b.prioritized_io: 0 p1003_1b.priority_scheduling: 200112 p1003_1b.realtime_signals: 200112 p1003_1b.semaphores: 0 p1003_1b.fsync: 200112 p1003_1b.shared_memory_objects: 200112 p1003_1b.synchronized_io: 0 p1003_1b.timers: 200112 p1003_1b.aio_listio_max: 256 p1003_1b.aio_max: 1024 p1003_1b.aio_prio_delta_max: 0 p1003_1b.delaytimer_max: 2147483647 p1003_1b.mq_open_max: 0 p1003_1b.pagesize: 4096 p1003_1b.rtsig_max: 62 p1003_1b.sem_nsems_max: 0 p1003_1b.sem_value_max: 0 p1003_1b.sigqueue_max: 128 p1003_1b.timer_max: 32
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