Hi,
* Jay Lan <jlan at sgi.com> [2008-07-08 11:30]:
>
> By "memory holes", did you mean zero value memory or memory gap
> as you can see from /proc/iomem? For example,
> 26003000000-26033dfffff : System RAM
> 26033e00000-260f7ffffff : System RAM <-- big gap b/t this and next
> 26800000000-268f7ffffff : System RAM
>
> If latter, the gap represents address gap between nodes and are
> non-existent memory.
Right.
> We do not need to spend time on non-existent memory.
See the loop below. The code processes very PFN and checks for it
3488 static inline int
3489 is_in_segs(unsigned long long paddr)
3490 {
3491 if (paddr_to_offset(paddr))
3492 return TRUE;
3493 else
3494 return FALSE;
3495 }
The whole process takes about 1 minute on a machine with 14 GiB memory.
So it's worth printing a progress bar. (Proabably that code could be optimised,
but that's an additional step.)
Bernhard
--
Bernhard Walle, SUSE LINUX Products GmbH, Architecture Development
