The attached (radically shortened) program to measure pipe performance oopses
the Linux-2.6.12-rc3 kernel when traced using "strace -f". The problem no longer
occurs in -rc4 or -rc5. It would be good to know whether the bug causing the
problem is known and has been fixed or simply went away due to other changes.
I have been unable to find a Changelog detailing the patches that went
into -rc4.
The bug is reproducible on all -rc3 kernels I've tried.
Unable to handle kernel NULL pointer dereference at virtual address 00000000
printing eip:
00000000
*pde = 00000000
Oops: 0000 [#1]
PREEMPT
Modules linked in:
CPU: 0
EIP: 0060:[<00000000>] Not tainted VLI
EFLAGS: 00010286 (2.6.12-rc3)
EIP is at 0x0
eax: db052000 ebx: 01200011 ecx: 00000000 edx: 00000000
esi: df605060 edi: 00000000 ebp: db052000 esp: db052fc4
ds: 007b es: 007b ss: 0068
Process pipe (pid: 778, threadinfo=db052000 task=df605060)
Stack: 01202011 00000000 00000000 00000000 b7ea0708 bf9da748 00000000 0000007b
c010007b 00000078 b7f290a5 00000073 00000282 bf9da6e0 0000007b
Call Trace:
Code: Bad EIP value.
Best regards,
-Udo.
Attachment:
pipe.c
Description: Binary data
Attachment:
pgpuIAgq8IfXk.pgp
Description: PGP signature
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