Dear Matthias Weisser,
In message 4F959235.1070106@arcor.de you wrote:
On Monday 23 April 2012 02:41:08 Wolfgang Denk wrote:
=>md 0x10000000100:Segmentation fault
yes, this is because the code to make this work was reverted because of ppc oddity. i haven't reviewed that yet to see why, but it seems to me that the ppc code is not quite right.
The PPC code just accesses physical memory, as is.
I suggested another solution: http://patchwork.ozlabs.org/patch/123074/
This has the disadvantage, as discussed in the thread, that the address passed to mmap is not guaranteed to be returned.
I don't see why this would be needed.
I think you got things backwards.
Please note that I do NOT complain that "md 0x100" or "md 0" segfaults in general; it is IMO perfectoy OK to do this if there is no memory. But the "bdinfo" command reported that memory starts at 0, and then both these commands are supposed to work.
I am not asking for any specific mapping - I just ask for _consistent_ information provided to the user.
Best regards,
Wolfgang Denk