Date: Fri, 11 Sep 2009 17:04:08 +0100 From: Gavin Atkinson <gavin@FreeBSD.org> To: Andriy Gapon <avg@icyb.net.ua> Cc: freebsd-current@FreeBSD.org Subject: Re: crashinfo issue in HEAD Message-ID: <1252685048.31066.55.camel@buffy.york.ac.uk> In-Reply-To: <4AAA61A0.2040600@icyb.net.ua> References: <4AAA54FF.9080701@icyb.net.ua> <1252679211.31066.43.camel@buffy.york.ac.uk> <4AAA61A0.2040600@icyb.net.ua>
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On Fri, 2009-09-11 at 17:41 +0300, Andriy Gapon wrote: > on 11/09/2009 17:26 Gavin Atkinson said the following: > > On Fri, 2009-09-11 at 16:47 +0300, Andriy Gapon wrote: > >> I had a panic (provoked via sw watchdog, nothing exciting) and after reboot I > >> noticed that couple of processes dumped core, apparently while running as part of > >> crashinfo procedure. > >> > >> savecore: reboot after panic: watchdog timeout > >> savecore: writing core to vmcore.0 > >> kernel: pid 725 (ps), uid 0: exited on signal 11 (core dumped) > >> kernel: pid 742 (fstat), uid 0: exited on signal 11 > >> > >> core.0.txt accordingly has: > >> ------------------------------------------------------------------------ > >> ps -axl > >> Segmentation fault (core dumped) > > > > You need at least r196990 (which has not yet been MFC'd) and > > http://people.freebsd.org/~gavin/PRs/137890.2.diff . Hopefully both of > > these will appear in 8.x. > > I mentioned HEAD in the subject, but didn't say specifically that this is very > recent HEAD - r197046. And amd64. Sorry for withholding such important details. > So that patch is not in HEAD yet? I will try it then, thanks! Hmm, in that case this is probably a different bug to the ones already found, and that patch won't help. Can you recompile ps and libkvm with debugging symbols, run it under gdb and get a backtrace? Your original stack trace shows kvm_getprocs() calling _kvm_freeprocs(), however the code doesn't appear to ever do this: indeed, nothing in libkvm calls _kvm_freeprocs() directly. Gavin
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