Date: Thu, 21 Oct 2004 16:51:04 -0400 (EDT) From: Mikhail Teterin <mi@aldan.algebra.com> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/72979: unkillable process(es) stuck in `STOP' state Message-ID: <200410212051.i9LKp4vF058117@250-217.customer.cloud9.net> Resent-Message-ID: <200410212100.i9LL0liY096753@freefall.freebsd.org>
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>Number: 72979 >Category: kern >Synopsis: unkillable process(es) stuck in `STOP' state >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Thu Oct 21 21:00:44 GMT 2004 >Closed-Date: >Last-Modified: >Originator: Mikhail Teterin >Release: FreeBSD 6.0-CURRENT i386 >Organization: Virtual Estates, Inc. >Environment: System: FreeBSD mi 6.0-CURRENT FreeBSD 6.0-CURRENT #1: Wed Oct 20 12:08:24 EDT 2004 mteterin@mi:/meow/obj/misha/src/sys/Gigabyte i386 debug.mpsafenet and safevm both set to 0 >Description: Somehow, it is possible to get a process into a state, where it can not be killed. The state is reported as `T' by ps and as `STOP' by top. There seems to be a zomie-child of the process, when this happens: UID PID PPID CPU PRI NI VSZ RSS MWCHAN STAT TT TIME COMMAND 1042 1096 1 57 8 0 68044 50228 - T ?? 0:27,88 kontact 1042 4903 1096 0 -84 0 0 0 - Z ?? 0:03,07 <defunct> But neither -CONT nor -KILL can get rid of the process. Attempts to ktrace it result in empty ktrace.out. >How-To-Repeat: It is unclear, what exactly is causing this. So far, I have seen it twice -- both time with KDE-programs (KMail and Kontact), which attach a debugger to themselves, when crashing (a frequent occurence). Whatever mistake KDE may be making in their error-handling, it does not explain an unkillable process. May be, this has something to do with the threading library (libpthread)? >Fix: Don't know... >Release-Note: >Audit-Trail: >Unformatted:
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