Bug 257291 - panic: deadlres_td_sleep_q: possible deadlock detected on 14.0-n248045-76fffd0a865 (in vt_kms_postswitch: sys/modules/drm-current-kmod/drivers/gpu/drm/linux_fb.c)
Summary: panic: deadlres_td_sleep_q: possible deadlock detected on 14.0-n248045-76fffd...
Status: Open
Alias: None
Product: Base System
Classification: Unclassified
Component: kern (show other bugs)
Version: CURRENT
Hardware: Any Any
: --- Affects Only Me
Assignee: freebsd-bugs (Nobody)
Keywords: crash, needs-qa
Depends on:
Reported: 2021-07-20 02:04 UTC by Masachika ISHIZUKA
Modified: 2021-07-20 15:44 UTC (History)
3 users (show)

See Also:
koobs: maintainer-feedback?
koobs: maintainer-feedback?
koobs: mfc-stable13-
koobs: mfc-stable12-
koobs: mfc-stable11-

core.txt (21.20 KB, application/x-xz)
2021-07-20 02:04 UTC, Masachika ISHIZUKA
no flags Details

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Description Masachika ISHIZUKA 2021-07-20 02:04:23 UTC
Created attachment 226561 [details]

On 14-curent n248045-76fffd0a865, panic occured.

% cat info.last 
Dump header from device: /dev/gpt/fbswap
  Architecture: amd64
  Architecture Version: 2
  Dump Length: 1568919552
  Blocksize: 512
  Compression: none
  Dumptime: 2021-07-20 00:35:20 +0900
  Hostname: carrot.ish.org
  Magic: FreeBSD Kernel Dump
  Version String: FreeBSD 14.0-CURRENT #3 master-n248045-76fffd0a865-dirty: Sun Jul 18 20:38:04 JST 2021
  Panic String: deadlres_td_sleep_q: possible deadlock detected for 0xfffffe00cdc6b720 (find), blocked for 1802049 ticks

  Dump Parity: 3215715396
  Bounds: 1
  Dump Status: good

vmcore.1 was saved at https://www.ish.org/files/vmcore-n248045.1.xz (863 megabytes).
Comment 1 Emmanuel Vadot freebsd_committer 2021-07-20 07:25:25 UTC
The vt message is just a false message, this happens when we panic and switch console.