current-users: Re: KDASSERT(sa->sa_nstacks > 0); in sa_upcall

Subject: Re: KDASSERT(sa->sa_nstacks > 0); in sa_upcall_userret(struct lwp *l)
To: Nathan J. Williams <nathanw@wasabisystems.com>
From: Lars Heidieker <lars@heidieker.de>
List: current-users
Date: 02/10/2003 22:18:06

I was able to reproduce the crash:

ddb output:

call debug_print_proc(0t746)
Process 746 (ltdaemon), state 2 address 0xe31a2e14, flags 4402
LWPs: 5 (1 running, 0 zombies)
LWP 5 address 0xe3759a84 state 3 flags b00004 wait 0xc029ffb0 uao_getpage
LWP 4 address 0xe3177c00 state 3 flags d00004 wait 0xc029ffb0 flt_noram1
LWP 3 address 0xe3177a00 state 2 flags d00004
LWP 2 address 0xe3177d00 state 3 flags f00004 wait 0xc029ffb0 flt_noram1
LWP 1 address 0xe3177e80 state 3 flags f00004 wait 0xc029ffb0 flt_noram5
SA VP: 5
SAs: 0 cached LWPs
8 upcall stacks
         0

before I have have seen the process crashing (signal 11)
with one lwp running and 4 or 5 in "sastacks" wait.

Hope this hels to track down the bugs.

MfG,
Lars