[DragonFlyBSD - Bug #2542] Kernel freezes for minutes at a time

[Francois Tigeot via Redmine <bugtracker-admin@xxxxxxxxxxxxxxxxxxxxx>]

Issue #2542 has been updated by ftigeot.


In one freeze instance an xterm was still responsive and I could run some simple utilites.

systat -pv 1:
        timer     ipi  extint user% nice%  sys% intr% idle%  tokcol   token
 cpu0     282       8      79   0.0   0.0   0.0   0.8  99.2       0
 cpu1     283       0       0   0.0   0.0   0.0   0.0 100.0       0
 cpu2     302       1       0   0.0   0.0   0.0   0.0 100.0       0
 cpu3     281       0       0   0.0   0.0 100.0   0.0   0.0 6504549   vmobj
 cpu4     282       0       0   0.0   0.0   0.0   0.0 100.0       0
 cpu5  5  391       4       0   0.8   0.0   0.0   0.0  99.2   54844 mp_toke
 cpu6     288       3       0   1.5   0.0   0.0   0.0  98.5       0
 cpu7     282       8       0   0.0   0.0   0.0   0.0 100.0      19    pool

top(1) also showed some 'mv' zombie processes; my windowmanager was frozen in 'RUN' state and didn't answer any command.
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Bug #2542: Kernel freezes for minutes at a time
http://bugs.dragonflybsd.org/issues/2542

Author: ftigeot
Status: New
Priority: Normal
Assignee: 
Category: 
Target version: 


Running the new poudriere-devel 2.3_4 port makes the system freeze for minutes at a time after a while.

* This is not the case at first, poudriere has to run for at least one hour for this phenomenon to become visible
* Display is frozen in place, periodically refreshed widgets such as clocks stop moving
* Keyboard and mouse input is not processed but is handled after a few minutes when the system becomes operational again
* Launching big applications such as firefox is enough to make the system freeze
* "Warning: deep namecache recursion at (null)" messages are printed on the console

When the system becomes operational again, top(1) shows one cpu thread using 100% cpu (system time).

A core dump taken when the system is in this state will be made available.


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