Re: Deadlock (maybe related to PR kern/56925)

[BERTRAND Joël <joel.bertrand%systella.fr@localhost>]

Michael van Elst a écrit :
> joel.bertrand%systella.fr@localhost (=?UTF-8?Q?BERTRAND_Jo=c3=abl?=) writes:
> 
>> 	For a very long time (I don't remember if it was from 9.0 or 9.1), my
>> main server randomly panics or enters in a deadlock when it tries to
>> access to an iSCSI NAS.
> 
> Can you provide information about the panic? kernel backtraces?

	All informations are in PR/56925

[ 613880.906790] S-1C-1: ccb_timeout: num=1 total=1 disp=0
[ 613880.906790] uvm_fault(0xffffffff815862c0, 0x0, 2) -> e
[ 613880.906790] fatal page fault in supervisor mode
[ 613880.906790] trap type 6 code 0x2 rip 0xffffffff8022800c cs 0x8 rflags
0x10246 cr2 0x10 ilevel 0 rsp 0xffffdb813c0c9f48
[ 613880.906790] curlwp 0xfffffda14406ba60 pid 0.181 lowest kstack
0xffffdb813c0c72c0
[ 613880.906790] panic: trap
[ 613880.906790] cpu1: Begin traceback...
[ 613880.906790] vpanic() at netbsd:vpanic+0x160
[ 613880.906790] snprintf() at netbsd:snprintf
[ 613880.906790] startlwp() at netbsd:startlwp
[ 613880.906790] alltraps() at netbsd:alltraps+0xbb
[ 613880.916794] ccb_timeout() at netbsd:ccb_timeout+0xf0
[ 613880.916794] iscsi_cleanup_thread() at netbsd:iscsi_cleanup_thread+0x2b6
[ 613880.916794] cpu1: End traceback...
[ 613880.916794] uvm_fault(0xfffffda43aad15c0, 0x0, 2) -> e
[ 613880.916794] fatal page fault in supervisor mode
[ 613880.916794] trap type 6 code 0x2 rip 0xffffffff8097d518 cs
[ 613880.916794]  0x8 rflags 0x10246 cr2 0x84 ilevel 0x8 rsp
0xffffdb8141e16cd9u0m
[ 613880.916794] ping to dev 18,1 (offset=251919, size=4162814):
[ 613880.916794] curlwp 0xfffffda3854184c0 pid 25426.1 lowest kstacdku m0px
ffffdb8141e142c0

> When the system deadlocks, can you then enter DDB ?

	No. System is full locked.

	Regards,

	JB