Messages in this thread | | | Date | Tue, 26 Apr 2005 21:34:40 +0200 | From | Juergen Quade <> | Subject | Re: system-freeze: kprobe and do_gettimeofday |
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On Tue, Apr 26, 2005 at 08:22:10PM +0530, Prasanna S Panchamukhi wrote: > > On Mon, Apr 25, 2005 at 06:08:59PM +0200, Juergen Quade wrote: > > On Mon, Apr 25, 2005 at 09:26:49PM +0530, Prasanna S Panchamukhi wrote: > > > On Sat, Apr 23, 2005 at 12:12:51PM +0200, Juergen Quade wrote: > > > > Playing around with kprobe I noticed, that "kprobing" > > > > the function "do_gettimeofday" completly freezes the > > > > system (2.6.12-rc3). Other functions like "do_fork" or > > > > > > Kprobe on "do_gettimeofday" seems to work fine on 4-way SMP i386 box. > > > What is configuration of your machine? > > > > Thank you for your answer! > > Find my kernel-config attached. > > The processor of the system is an Pentium M > > (1400MHz, 512MByte Memory - nothing specific). > > > > I tested with your configuration file and it still > works fine. Can you get some more info about current tasks > using Alt+SysRq+t and Alt+SysRq+d keys.
I did now a lot of additional tests. When running "insmod kgettime.ko" from the console (not from x-windows) I get:
kprobe registered address c0107bd0 // output from the module double fault, gdt at c049bd00 [255 bytes] double fault, tss at c03d4060 eip = c0103c86, esp = db932000 eax = ffffffff, ebx = db932134, ecx = 0000000d, edx = 00000000 esi = db932080, edi = 0000000d
Alt+SysRq did not work...
Then I removed all my modules (except 2) I was able to load the module without problems. I added module by module and checked every time with "insmod kgettime.ko". When loading the "ohci1394" module it crashed again. But next time I loaded the "ohci"-module first - no crash. (So I don't think it is the ohci-module). I was able to load all modules and it still worked.
Hmmm. What else to check?
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