Re: page fault panic tracked down (selwakeuppri())

On Tue, 2004-01-06 at 03:06, Don Lewis wrote:
> The parameters passed to feed_vchan_16() might be bad in such a way that
> the KASSERT is happy, but the heap still gets trashed.
> 
> If you can't get the KASSERT failure without this code being in a module
> (or get gdb to debug the module), it might be interesting to change this
> KASSERT into an "if" test that prints the parameters and anything else
> of interest and then calls panic().

As a workaround I just built the sound modules with COPTS=-g and
installed them.

Unfortunately I haven't been able to reproduce the previous panic in the
modules again. I hope I can restore the exact configuration to get the
"bad bufsize" panic - this time with more debug info.

This time I got one more page fault panic and then this - looks even
more random to me

panic: Most recently used by none
#0  doadump () at /usr/src/sys/kern/kern_shutdown.c:240
#1  0xc04e5178 in boot (howto=256) at
/usr/src/sys/kern/kern_shutdown.c:372
#2  0xc04e5507 in panic () at /usr/src/sys/kern/kern_shutdown.c:550
#3  0xc0632077 in mtrash_ctor (mem=0xc37dcc00, size=0, arg=0x0)
    at /usr/src/sys/vm/uma_dbg.c:137
#4  0xc06307db in uma_zalloc_arg (zone=0xc103dd80, udata=0x0, flags=2)
    at /usr/src/sys/vm/uma_core.c:1403
#5  0xc04d9ec3 in malloc (size=3238256000, type=0xc06ca8e0, flags=2)
    at /usr/src/sys/vm/uma.h:234
#6  0xc04d6a8e in kldsym (td=0xc3ec4690, uap=0xd8ac8d14)
    at /usr/src/sys/kern/kern_linker.c:1015
#7  0xc0661460 in syscall (frame=
      {tf_fs = 47, tf_es = -1078001617, tf_ds = -1078001617, tf_edi = 1,
tf_esi = 134548140, tf_ebp = -1077941720, tf_isp = -659780236, tf_ebx =
672558244, tf_edx = -1077941504, tf_ecx = 0, tf_eax = 337, tf_trapno =
22, tf_err = 2, tf_eip = 672881359, tf_cs = 31, tf_eflags = 518, tf_esp
= -1077941780, tf_ss = 47})
    at /usr/src/sys/i386/i386/trap.c:1010
#8  0xc06523bd in Xint0x80_syscall () at {standard input}:136