Messages in this thread | | | Date | Tue, 12 Jan 2010 11:39:03 +0900 | From | KAMEZAWA Hiroyuki <> | Subject | Re: [PATCH - resend] Memory-Hotplug: Fix the bug on interface /dev/mem for 64-bit kernel(v1) |
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On Tue, 12 Jan 2010 10:33:08 +0800 Wu Fengguang <fengguang.wu@intel.com> wrote:
> Sure, here it is :) > --- > x86: use the generic page_is_ram() > > The generic resource based page_is_ram() works better with memory > hotplug/hotremove. So switch the x86 e820map based code to it. > > CC: Andi Kleen <andi@firstfloor.org> > CC: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> > Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Ack.
> +#ifdef CONFIG_X86 > + /* > + * A special case is the first 4Kb of memory; > + * This is a BIOS owned area, not kernel ram, but generally > + * not listed as such in the E820 table. > + */ > + if (pfn == 0) > + return 0; > + > + /* > + * Second special case: Some BIOSen report the PC BIOS > + * area (640->1Mb) as ram even though it is not. > + */ > + if (pfn >= (BIOS_BEGIN >> PAGE_SHIFT) && > + pfn < (BIOS_END >> PAGE_SHIFT)) > + return 0; > +#endif
I'm glad if this part is sorted out in clean way ;)
Thanks, -Kame
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