Date: Thu, 13 Feb 2003 10:32:53 +0100 From: Dag-Erling Smorgrav <des@ofug.org> To: current@freebsd.org Subject: panic in propagate_priority Message-ID: <xzpof5gwmnu.fsf@flood.ping.uio.no>
next in thread | raw e-mail | index | archive | help
(panic string got lost because the serial console wasn't connected at
the time)
db> trace
Debugger(c02f7be1,1,c412e8fc,2,c0351380) at Debugger+0x50
panic(c02f7160,4c,c0351380,c1502ee0,0) at panic+0x88
propagate_priority(c1502ee0,0,553,c02fb9d3,0) at propagate_priority+0x1ad
_mtx_lock_sleep(c0351380,0,c02fb9d3,553) at _mtx_lock_sleep+0x111
_mtx_lock_flags(c0351380,0,c02fb9d3,553,0) at _mtx_lock_flags+0x4c
brelse(ce6793c0) at brelse+0x15d
bufdone(ce6793c0,d69bacac,c018e195,ce6793c0,c031fde0) at bufdone+0x237
biodone(ce6793c0,c031fde0,0,c02f317e,179) at biodone+0x14
g_dev_done(c4843e00,d69bacc4,c0190a18,c4843e00,d69bad1c) at g_dev_done+0x55
biodone(c4843e00,d69bad1c,c0190bc6,c1502ee0,c031fc40) at biodone+0x14
g_io_schedule_up(c1502ee0,c031fc40,c02f3b56,c02f3b56,30000) at g_io_schedule_up+
0x18
g_up_procbody(0,d69bad48,c1502ee0,c0190b60,0) at g_up_procbody+0x66
fork_exit(c0190b60,0,d69bad48) at fork_exit+0x91
fork_trampoline() at fork_trampoline+0x1a
--- trap 0x1, eip = 0, esp = 0xd69bad7c, ebp = 0 ---
(kgdb) l *(propagate_priority+0x1ad)
0xc01b30ed is in propagate_priority (../../../kern/kern_mutex.c:134).
129
130 /*
131 * If lock holder is actually running, just bump priority.
132 */
133 if (TD_IS_RUNNING(td)) {
134 td->td_priority = pri;
135 return;
136 }
137
138 #ifndef SMP
Must be a race, because TD_IS_RUNNING would have bombed if td was
NULL, so most likely td became NULL between lines 133 and 134.
DES
--
Dag-Erling Smorgrav - des@ofug.org
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-current" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?xzpof5gwmnu.fsf>