Date: Tue, 18 Jan 2011 16:34:10 +0100 From: =?ISO-8859-1?Q?Beat_G=E4tzi?= <beat@chruetertee.ch> To: Kostik Belousov <kostikbel@gmail.com> Cc: current@freebsd.org Subject: Re: Running linux ldconfig on tmpfs results in unkillable process Message-ID: <4D35B2F2.1000804@chruetertee.ch> In-Reply-To: <20110118144611.GP2518@deviant.kiev.zoral.com.ua> References: <4D35A0BB.3010601@chruetertee.ch> <20110118144611.GP2518@deviant.kiev.zoral.com.ua>
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On 18.01.2011 15:46, Kostik Belousov wrote: > On Tue, Jan 18, 2011 at 03:16:27PM +0100, Beat G?tzi wrote: >> Hi, >> >> I've a tinderbox which uses tmpfs to build ports. Every time I build a >> port which executes linux ldconfig it results in an unkillable process >> which uses 100% CPU. The problem is reproduceable without tinderbox: >> >> # uname -a >> FreeBSD daedalus.network.local 9.0-CURRENT FreeBSD 9.0-CURRENT #3 >> r216761: Tue Dec 28 15:32:26 CET 2010 >> root@daedalus.network.local:/usr/obj/usr/src/sys/GENERIC i386 >> # mkdir /compat/test >> # mount -t tmpfs tmpfs /compat/test >> # cp -Rp /compat/linux/* /compat/test/ >> # mount -t linprocfs linprocfs /compat/test/proc >> # /compat/linux/sbin/ldconfig -r /compat/test/ >> # pgrep ldconfig >> 3449 >> # procstat -i 3449 | grep KILL >> 3449 ldconfig KILL --- >> # kill -9 3449 >> # procstat -i 3449 | grep KILL >> 3449 ldconfig KILL P-- >> >> >From top(1): >> PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND >> 3449 root 1 44 0 992K 712K CPU1 1 10:06 100.00% ldconfig >> >> When I reboot the machine it hangs after "All buffers synced.". >> >> I've uploaded some additional output of procstat and ktrace here: >> http://people.freebsd.org/~beat/logs/linux-ldconfig-tmpfs.txt >> >> Anyone knows how to fix this? > kdump for the trace of the linux binary is a garbage. You need to > use linux_kdump (from ports). > > I think that your process is looping in the kernel, you can confirm this > by dropping in the ddb and doing "bt <pid>". I've uploaded a screenshot from the output of bt <pid> in ddb: http://people.freebsd.org/~beat/logs/linux-ldconfig-tmpfs-bt.jpg Thanks, Beat
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