Re: kern/56561: cv_is_valid assertion failure in intel drm

["John D. Baker" <jdbaker%consolidated.net@localhost>]

The following reply was made to PR kern/56561; it has been noted by GNATS.

From: "John D. Baker" <jdbaker%consolidated.net@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: kern/56561: cv_is_valid assertion failure in intel drm
Date: Sat, 28 May 2022 11:19:15 -0500 (CDT)

 I have just run into this panic as well on 9.99.97/amd64.  The system
 was idle with my usual X arangement.  When I returned to the machine,
 it had rebooted.
 
 The last bit of "dmesg" as recovered by 'crash':
 
 [...]
 [ 8348.0558266] heartbeat *
 [ 8348.0558266] heartbeat Idle? no
 [ 8348.0558266] heartbeat Signals:
 [ 8348.0558266] heartbeat       [2:2cac6*] @ 5990ms
 [ 8348.0558266] heartbeat       [2:2cac7] @ 4990ms
 [ 8348.0558266] i915drmkms0: notice: Resetting chip for stopped heartbeat on rcs
 0
 [ 8348.0558266] i915drmkms0: notice: xlock[1578] context reset due to GPU hang
 [ 9078.8967489] nfs server yggdrasil:/r0/home/jdbaker: not responding
 [ 9079.0665965] nfs server yggdrasil:/r0/home/jdbaker: is alive again
 [ 10316.4686326] nfs server yggdrasil:/r0/home/jdbaker: not responding
 [ 10316.5386338] nfs server yggdrasil:/r0/home/jdbaker: is alive again
 [ 13680.6386480] panic: kernel diagnostic assertion "cv_is_valid(cv)" failed: fi
 le "/x/current/src/sys/kern/kern_condvar.c", line 511
 [ 13680.6386480] cpu0: Begin traceback...
 [ 13680.6386480] vpanic() at netbsd:vpanic+0x183
 [ 13680.6386480] kern_assert() at netbsd:kern_assert+0x4b
 [ 13680.6386480] cv_broadcast() at netbsd:cv_broadcast+0x56
 [ 13680.6386480] linux___dma_fence_signal_wake() at netbsd:linux___dma_fence_sig
 nal_wake+0x13e
 [ 13680.6386480] signal_irq_work() at netbsd:signal_irq_work+0x2ca
 [ 13680.6386480] irq_work_intr() at netbsd:irq_work_intr+0x87
 [ 13680.6386480] softint_dispatch() at netbsd:softint_dispatch+0xf9
 [ 13680.6386480] DDB lost frame for netbsd:Xsoftintr+0x4f, trying 0xffffc580aed4
 90f0
 [ 13680.6386480] Xsoftintr() at netbsd:Xsoftintr+0x4f
 [ 13680.6386480] --- interrupt ---
 [ 13680.6386480] bfbd3f7fb7d79fb7:
 [ 13680.6386480] cpu0: End traceback...
 
 [ 13680.6386480] dumping to dev 0,1 (offset=16867127, size=2086023):
 [ 13680.6386480] dump
 
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