Re: fr1-2.16 patch for 2.6.10 kernel

denis bonnenfant <[email protected]> wrote:
> >>md 3885: ** mddev->pers=f88a8b60
> >>md 3886: ** mddev->pers->hot_add_disk=f88a5388
> >>Unable to handle kernel NULL pointer dereference at virtual address 00000004
> >>  printing eip:
> > 
> > 
> > So it still looks like death in hot_add_disk. Did you answer my
> > question about the address of hot_add_disk, as seen in /proc/kallsysms?
> 
> excuse me i forgot it  :
> 
> grep add /proc/kallsyms | grep hot
> f88b7488 t hot_add_disk [md]

Well, that doesn't match f88a5388. But it's not far away. 0x12100 away.
Curious. Is there anything in kallsyms with address f88a5388?

> 
> f88a53d7
> *pde = 00000000
> Oops: 0000 [#1]
> PREEMPT
> Modules linked in: raid1 bitmap md epic100 usbkbd parport_pc lp parport
> CPU:    0
> EIP:    0060:[<f88a53d7>]    Not tainted
> EFLAGS: 00010083   (2.6.8-enbd-fr1-debug1)
> EIP is at raid1_add_disk+0x4f/0xf8 [raid1]

Ahhhhh ... it's in raid1_add_disk, not hot_add_disk. Oookaaaayyyyyy..

One quarter way through. Hmmm - that could be me. Can you instrument?


> > 
> > One at the start of hot_add_disk.
>   You might be interested in the
> > __FUNCTION__ macro! It's a string.
> >
> ok I try it.


Peter