Re: propagate_priority panic [backtrace]

On Thursday 13 January 2005 01:10 am, Anish Mistry wrote:
> 	Not sure if anyone else is seeing this, but I'm pretty sure the following
> commit broke my system.  When mysql tries to shutdown I get a panic in
> propagate_priority. As well as X freezing when I go to start it.  Actually
> one of the applictions or the WM causes it to freeze, but same problem I
> think but I can't see the console.  Before this everything worked fine.  I
> can post the hand transcribed panic backtrace message tomorrow if anyone
> is interested since I don't have a serial port on the machine.
> I'm using the 4BSD scheduler with the latest -CURRENT.
>
> jhb         2004-12-30 20:52:44 UTC
>
>   FreeBSD src repository
>
>   Modified files:
>     sys/kern             sched_4bsd.c sched_ule.c subr_turnstile.c
>     sys/sys              proc.h sched.h turnstile.h
>
>   Revision  Changes    Path
>   1.71      +102 -14   src/sys/kern/sched_4bsd.c
>   1.144     +77 -20    src/sys/kern/sched_ule.c
>   1.151     +120 -71   src/sys/kern/subr_turnstile.c
>   1.415     +1 -0      src/sys/sys/proc.h
>   1.23      +2 -0      src/sys/sys/sched.h
>   1.6       +1 -0      src/sys/sys/turnstile.h
Dmesg and kernel config attached.
Ok, here is the panic and backtrace:
kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x4
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc04d5a4f
stack pointer = 0x10:0xcc53bbdc
frame pointer = 0x10:0xcc53bbec
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = resume, IOPL = 0
 current process = 628 (mysqld)
[thread pid 628 tid 100085 ]
Stopped at propagate_priority+0x153: pushl 0x4(%eax)
db> tr
Tracing pid 628 tid 100085 td 0xc14e4730
propagate_priority(c0645cb4,c0645cb0,c15ac650,c14e4730,c14e4730) at 
propagate_priority+0x153
turnstile_wait(c15as650,c15ac650,2,c05f401e,21e) at turnstile_wait+0x1ae
_mtx_lock_sleep(c15ac650,c14e4730,0,c05f8604,206) at _mtx_lock_sleep+0x85
_mtx_lock_flags(c15ac650,0,c05f8604,206,c15ac650) at _mtx_lock_flags+0x50
sleepq_calc_signal_retval(0,0,100,ci4e4730,8476f4c) at 
sleep_calc_signal_retval+0x2b
msleep(c10bb334,c15ac650,168,c05f399a,402) at msleep+0x3eb
kse_release(c14e4730,cc53bd14,1,12,296) at kse_release+0x186
syscall(2f,2f,2f,8472000,0) at syscall+0x128
Xint-x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (383, FreeBSD ELF32, kse_release), eip = 0x285851eb, esp = 
0x8476f28, ebp = 0x8476f64

-- 
Anish Mistry