Date: Mon, 20 Oct 2003 07:44:51 +0200 From: Morten Rodal <morten@rodal.no> To: Daniel Eischen <eischen@vigrid.com> Cc: threads@freebsd.org Subject: Re: libkse and bus error Message-ID: <20031020054450.GA39716@slurp.rodal.no> In-Reply-To: <Pine.GSO.4.10.10310191747540.26554-100000@pcnet5.pcnet.com> References: <20031019183129.GA94145@slurp.rodal.no> <Pine.GSO.4.10.10310191747540.26554-100000@pcnet5.pcnet.com>
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On Sun, Oct 19, 2003 at 05:50:54PM -0400, Daniel Eischen wrote:
> On Sun, 19 Oct 2003, Morten Rodal wrote:
>
> > On Sun, Oct 19, 2003 at 02:16:27PM -0400, Daniel Eischen wrote:
> > > On Sun, 19 Oct 2003, Morten Rodal wrote:
> > >
> > > > I seem to be able to crash almost every pthread program that uses
> > > > pthread_mutex'es. First I thought it was a problem with
> > > > pthread_testcancel(), until I compiled libkse with DEBUG_FLAGS=-g on
> > > > one of machines.
> > > >
> > > > Backtrace from a machine with DEBUG_FLAGS=-g and libkse:
> > > >
> > > > #0 0x28e6ed1b in kse_thr_interrupt () at {standard input}:15
> > > > #1 0x28e5f990 in _thr_sig_add (pthread=0x81fab00, sig=136293172,
> > > > info=0x0)
> > > > at /usr/src/lib/libpthread/thread/thr_sig.c:885
> > > > #2 0x28e687cb in kse_check_completed (kse=0x81fab00)
> > > > at /usr/src/lib/libpthread/thread/thr_kern.c:1558
> > > > #3 0x28e6721c in kse_sched_multi (kmbx=0x17e)
> > > > at /usr/src/lib/libpthread/thread/thr_kern.c:1021
> > >
> > > This is a problem. The mailbox pointer is invalid.
> > >
> >
> > I thought it looked a bit strange. Any clues to what might have
> > caused this?
>
> When I've seen it before, it's when %gs becomes corrupted. Nvidia
> uses static ldt allocation and this can screw things up. If you
> are getting any static ldt allocations out of the kernel, that is
> the problem.
>
Ok. Then that's probably my problem. I did see some warnings about
pids using static ldt allocation, but they haven't appeared for a
while now. So my threading support is in the hands of nvidia now.
That kind of sucks, but I guess I can live with it..
--
Morten Rodal
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