Re: Realtime Preemption, 2.6.12, Beginners Guide?

[Ingo Molnar <mingo@elte.hu>]

* Alistair John Strachan <s0348365@sms.ed.ac.uk> wrote:

> Ours links to a company server with a consumer grade 1Mbit ADSL 
> connection, and transferring just about anything at 110K/s causes the 
> kernel to crash within about 10 seconds.
> 
> I wish you the best of luck with getting this going, and I apologise 
> in advance for the poor instructions.

it worked upon the first try, and indeed my testbox crashed within 10 
seconds:

 BUG: Unable to handle kernel NULL pointer dereference
 BUG: Unable to handle kernel NULL pointer dereference at virtual address 00000006
  printing eip:
 00000006
 *pde = 00000000
 Oops: 0000 [#1]
 PREEMPT
 Modules linked in:
 CPU:    0
 EIP:    0060:[<00000006>]    Not tainted VLI
 EFLAGS: 00010286   (2.6.12-RT-V0.7.51-30-debug)
 EIP is at 0x6
 eax: c057fef8   ebx: c0614340   ecx: c04490b8   edx: 00000001
 esi: c057ff34   edi: c0135d52   ebp: c057ff54   esp: c057ff3c
 ds: 007b   es: 007b   ss: 0068   preempt: 20000002

it was enough to "ssh 10.0.0.1" from the client, and typing "yes" would 
trigger the crash very soon.

thanks for the instructions - now i can start debugging this :-)

	Ingo
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