Thread (7 messages) 7 messages, 2 authors, 2009-05-28

RE: How to debug a hung multi-core system....

From: Morrison, Tom <hidden>
Date: 2009-05-21 15:22:17

Just had a little conference with several co-workers...to go over
results

We think that LT0 (the one that maps the kernel) has been corrupted:

       Entry  EPN          RPN    TID  TMASK   WIMGE  TSIZ U0:3  X0:1
       ---------------------------------------------------------------
       LT0  C0000000     00000000 00     0FF     04     9     0     0

       PID  TS  PROT SHEN   UR   UW   UX   SR   SW   SX  TIDZ VAL
       ---------------------------------------------------------------
       0    0    P    P    E    E    D    E    E    D    D    V

Is absolutely wrong - this is TLB for the kernel - and as you can see=20
...it does NOT have execution privileges (and in fact the user space=20
HAS executive privileges for this area (complete opposite of what it=20
should be)...

This is why it is stuck AT that instruction (can't even single step
from that location)..

(one of) The first problem(s) is how can/when did this TLB get
corrupted!

Tom
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