Messages in this thread | | | Date | Thu, 10 Aug 2006 13:46:16 +0900 | From | KAMEZAWA Hiroyuki <> | Subject | Re: Re : Re : Re : Re : sparsemem usage |
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On Wed, 9 Aug 2006 14:19:01 +0000 (GMT) moreau francis <francis_moreau2000@yahoo.fr> wrote:
> Not all arch have page_is_ram(). OK it should be easy to have but we will > need create new data structures to keep this info. The point is that it's > really easy for memory model such sparsemem to keep this info. > > > Do you have a usage model in which we really care about the number of > > pages in the system to that level of accuracy? > > > > show_mem(), which is arch specific, needs to report them. And some > implementations use only pfn_valid(). >
BTW, ioresouce information (see kernel/resouce.c)
[kamezawa@aworks Development]$ cat /proc/iomem | grep RAM 00000000-0009fbff : System RAM 000a0000-000bffff : Video RAM area 00100000-2dfeffff : System RAM
is not enough ?
I think kdump depends on this resouce information to determine where should be dumped.
-Kame
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