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

From: Francois Tigeot via Redmine <bugtracker-admin@xxxxxxxxxxxxxxxxxxxxx>
Date: Sun, 7 Apr 2013 23:45:44 -0700

Issue #2542 has been updated by ftigeot.

This behavior was seen with 8 threads Xeon systems, with both i386 and amd64 DragonFly-3.4rc installations.
Bug #2542: Kernel freezes for minutes at a time

Author: ftigeot
Status: New
Priority: Normal
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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