Chuck Ebbert wrote: [Thu Jun 07 2007, 11:42:38AM EDT]
> On 06/06/2007 08:27 PM, john stultz wrote:
> > Hey All,
> > With 2.6.21 and the current -git, we're seeing the following oops when
> > we try sysrq-m:
> >
>
> It's here in arch/x86_64/mm/init.c::show_mem():
>
> for_each_online_pgdat(pgdat) {
> for (i = 0; i < pgdat->node_spanned_pages; ++i) {
This is probably with sparsemem? I'm working with [EMAIL PROTECTED] to
test a patch. Basically you need to validate the pfn because it
could be in a hole. Most arches which support sparsemem perform this
check.
if (!pfn_valid(pgdat->node_start_pfn + i))
continue;
bob
> page = pfn_to_page(pgdat->node_start_pfn + i);
> total++;
> ======> if (PageReserved(page))
> reserved++;
> else if (PageSwapCache(page))
> cached++;
> else if (page_count(page))
> shared += page_count(page) - 1;
> }
> }
>
> page is completely bogus (it's 0x0000000003480000)
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