[DragonFlyBSD - Bug #3392] Fails to shutdown and boot properly

[bugtracker-admin at leaf.dragonflybsd.org]

Issue #3392 has been updated by mneumann.


Ok, it's not related to i915 at all or chrome. I get timeouts even without starting X11.

Everything works normally again when I revert commit "8ec33efba7563efab10f0d90b5684480d94daf0a" (vkernel: Restore MAP_VPAGETABLE support with COW/VPTE fix (2)), so something in this commit must break my system.

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Bug #3392: Fails to shutdown and boot properly
http://bugs.dragonflybsd.org/issues/3392#change-14628

* Author: mneumann
* Status: New
* Priority: Normal
* Target version: 6.6
* Start date: 2026-01-22
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Tested with HEAD as of Tue Jan 20, 2026 (868971441c9e703282089412240c0361dd9687fd)

Since commit 41fb76421dce (vkernel: Restore MAP_VPAGETABLE), shutdown hangs, reporting:

"malloc_uninit: 120 bytes of 'HAMMER2-msg' still allocated on cpu 8".

It also takes unusually long between running "halt -p" and the start of the shutdown procedure.

The next boot then hangs within "Mounting tmpfs at /var/run/shm".

Chrome also once seemed to fail starting (or it took unusual long for me to think it failed).

One other person has also reported some strange timeouts happening with commit "41fb76421dce" (reported on IRC). 

Screenshots attached, starting the "hang" on shutdown and boot.

---Files--------------------------------
bug1.small.jpg (723 KB)
bug2.small.jpg (630 KB)


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