Re: [uml-devel] uml-patch-2.4.26-2

[Nick Craig-Wood <nick@memset.com>]

I'm having trouble getting this to run stably.  On a Fedora core 2
image it locks up with 100% CPU after about 12 hours
normally.

uml-patch-2.4.26-1 did the same thing (but required quite a bit of
patching to even get throught the boot process!).

I'm using 2.4.26 + uml-patch-2.4.26-2 plus the patches from /work/2.4
on a SKAS host running 2.4.25.

Here is a gdb backtrace of the locked UML.  It still responds to ping
and uml_mconsole but it doesn't respond to ssh...

#0  0xa01e68f5 in sigprocmask ()
#1  0xa00e5a10 in change_signals (type=0) at signal_user.c:69
#2  0xa00e5a48 in block_signals () at signal_user.c:75
#3  0xa00165c0 in do_softirq () at softirq.c:95
#4  0xa00e0c42 in do_IRQ (irq=0, regs=0xa0294278) at irq.c:336
#5  0xa00e710e in timer_irq (regs=0xa0294278) at time_kern.c:76
#6  0xa00e7418 in timer_handler (sig=14, regs=0xa0294278) at time_kern.c:163
#7  0xa00ed1d4 in sig_handler_common_skas (sig=14, sc_ptr=0xa0297868)
    at trap_user.c:35
#8  0xa00e7eed in alarm_handler (sig=14, sc=
      {gs = 0, __gsh = 0, fs = 0, __fsh = 0, es = 43, __esh = 0, ds = 43, __dsh = 0, edi = 2687057920, esi = 2687057920, ebp = 2687073132, esp = 2687073088, ebx = 2687073124, edx = 2687057920, ecx = 0, eax = 4294967292, trapno = 14, err = 6, eip = 2686421985, cs = 35, __csh = 0, eflags = 643, esp_at_signal = 2687073088, ss = 43, __ssh = 0, fpstate = 0x0, oldmask = 0, cr2 = 2827055104})
    at trap_user.c:115
#9  <signal handler called>
#10 0xa01f8be1 in nanosleep ()
#11 0xa00e6fe9 in idle_sleep (secs=10) at time.c:132
#12 0xa00e36ea in cpu_idle () at process_kern.c:212
#13 0xa000e5b1 in rest_init () at init/main.c:346
#14 0xa000255c in start_kernel () at init/main.c:440
#15 0xa00ecb5f in start_kernel_proc (unused=0x0) at process_kern.c:156
#16 0xa00e3236 in run_kernel_thread (fn=0xa00ecb38 <start_kernel_proc>, 
    arg=0x0, jmp_ptr=0xa0294558) at process.c:227
#17 0xa00ec92d in new_thread_handler (sig=10) at process_kern.c:70
#18 <signal handler called>
#19 0xa01e6971 in kill ()
#20 0x0000001c in ?? ()

Let me know if I can produce anything more interesting from gdb - I've
left the UML locked up.

-- 
Nick Craig-Wood   Tel: 0800 195 4968   Net: nick@memset.com
Memset Ltd                             Web: http://www.memset.com


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