Date: Thu, 23 Dec 2004 02:48:22 -0500 From: Lucas Madar <lucas@negaverse.org> To: freebsd-stable@freebsd.org Subject: panic in 5.3-stable related to heavy usage and libthr Message-ID: <41CA7846.2020604@negaverse.org>
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I updated a machine today to 5.3-STABLE and almost instantly it crashed
when a heavily threaded program ran. (The machine was previously running
5.2-release).
This crash is reproducible under heavy load with four threads using
libthr -- I haven't tested any other variances on this scheme, and I
will be testing 5.3-RELEASE tomorrow to see if it exhibits the same
problems.
relevant info from kgdb, with null pointer goodness.
#23 0x00000000 in ?? ()
#24 0xc055681f in sleepq_remove_thread (sq=0x0, td=0x0) at
/data/rootsystem/src/sys/kern/subr_sleepqueue.c:581
#25 0xc0556a16 in sleepq_signal (wchan=0xc2b91320, flags=0, pri=-1) at
/data/rootsystem/src/sys/kern/subr_sleepqueue.c:677
#26 0xc053fa53 in wakeup_one (ident=0xc2b91320) at
/data/rootsystem/src/sys/kern/kern_synch.c:266
#27 0xc0543052 in thr_wake (td=0xc2b91000, uap=0xc2b91000) at
/data/rootsystem/src/sys/kern/kern_thr.c:303
#28 0xc0698c9f in syscall (frame=
{tf_fs = 134742063, tf_es = 134742063, tf_ds = -1078001617, tf_edi
= 134558784, tf_esi = 135229440, tf_ebp = -1079198052, tf_isp =
-378659468, tf_ebx = 671863452, tf_edx = 134558792, tf_ecx = 0, tf_eax =
443, tf_trapno = 22, tf_err = 2, tf_eip = 672179195, tf_cs = 31,
tf_eflags = 662, tf_esp = -1079198096, tf_ss = 47}) at
/data/rootsystem/src/sys/i386/i386/trap.c:1001
#29 0xc0686c1f in Xint0x80_syscall () at
/data/rootsystem/src/sys/i386/i386/exception.s:201
Is this useful to anyone? I'll keep this around if you need to poke at
any structures.
- lucas
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