Re: 2.1.127 reboots...

Romano Giannetti (romano@upco.es)
Mon, 16 Nov 1998 16:59:11 +0100

On Sun, Nov 15, 1998 at 09:10:32AM +0100, storner@image.dk wrote:
> In <199811150527.AAA04354@alcove.wittsend.com> "Michael H. Warfield" <mhw@wittsend.com> writes:
>
> [strange slowdowns on 2.1.12[78] compiled without SMP]
>
> > His report may be useless, but we've got a BUNCH of people on 4
> >or 5 different threads all chiming in with basically the same problem.
> [cut]
> > Any thoughts on any way we can isolate this animal better?
>
> Any of you have "Magic SysRq key" enabled ? This could be used to figure
> out what the kernel is doing.
>

In schedule():

% grep EIP /var/log/messages
Nov 11 12:27:09 pern kernel: EIP: 0010:[<c010fe83>] EFLAGS: 00000246
Nov 11 12:27:11 pern kernel: EIP: 0010:[<c010fe4e>] EFLAGS: 00000206
Nov 11 12:27:15 pern kernel: EIP: 0010:[<c010fe4e>] EFLAGS: 00000206
Nov 11 12:27:17 pern kernel: EIP: 0010:[<c010feab>] EFLAGS: 00000246
Nov 11 12:27:19 pern kernel: EIP: 0010:[<c010fe4e>] EFLAGS: 00000206
Nov 11 12:27:47 pern kernel: EIP: 0010:[<c010fe83>] EFLAGS: 00000246
Nov 11 12:27:49 pern kernel: EIP: 0010:[<c010fe38>] EFLAGS: 00000246
Nov 11 12:27:49 pern kernel: EIP: 0010:[<c010fe4e>] EFLAGS: 00000206
Nov 11 12:27:50 pern kernel: EIP: 0010:[<c010fdb1>] EFLAGS: 00000246
Nov 11 12:27:51 pern kernel: EIP: 0010:[<c010fe4e>] EFLAGS: 00000206
Nov 11 12:27:52 pern kernel: EIP: 0010:[<c010fe4e>] EFLAGS: 00000206
Nov 11 12:27:52 pern kernel: EIP: 0010:[<c010febb>] EFLAGS: 00000206
Nov 11 12:27:52 pern kernel: EIP: 0010:[<c010fe4e>] EFLAGS: 00000206
% grep c010f /boot/System.map
c010f17c T sys_kill
c010f1d8 T sys_rt_sigqueueinfo
c010f2b0 T do_sigaction
c010f3e4 T do_sigaltstack
c010f564 T sys_sigprocmask
c010f6d4 T sys_sigpending
c010f740 T sys_rt_sigaction
c010f814 T sys_sgetmask
c010f824 T sys_ssetmask
c010f884 T sys_signal
c010f8b8 t recalc_sigpending
c010f8ec T scheduling_functions_start_here
c010f8f4 T wake_up_process
c010f958 t process_timeout
c010f968 T add_timer
c010fad0 T mod_timer
c010fc50 T del_timer
c010fc8c T schedule_timeout
c010fd38 T schedule
c010ff44 T __wake_up
c010ff80 T __up
c010ffa0 T __down

Linux pern.dea.icai.upco.es 2.1.127 #3 Wed Nov 11 10:03:12 CET 1998
i686 unknown

(Happened one time, cannot reproduce it, working now with a nice
fork-bomb-like prog keeping load at 5, 30 childs doing mild
computacion and usleep(5000) in them).

-- 
Romano Giannetti, Professor  -  Univ. Pontificia Comillas (Madrid, Spain)
Electronic Engineer - phone +34 915 422 800 ext 2410  fax +34 915 596 569


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