Commit 33df4db0 authored May 07, 2009 by Jeremy Fitzhardinge Committed by Ingo Molnar May 08, 2009

x86: xen, i386: reserve Xen pagetables



The Xen pagetables are no longer implicitly reserved as part of the other
i386_start_kernel reservations, so make sure we explicitly reserve them.
This prevents them from being released into the general kernel free page
pool and reused.

[ Impact: fix Xen guest crash ]

Also-Bisected-by: Bryan Donlan <bdonlan@gmail.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Xen-devel <xen-devel@lists.xensource.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <4A032EEC.30509@goop.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent 6407df5c

arch/x86/xen/mmu.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -1794,6 +1794,11 @@ __init pgd_t xen_setup_kernel_pagetable(pgd_t pgd,

		pin_pagetable_pfn(MMUEXT_PIN_L3_TABLE, PFN_DOWN(__pa(swapper_pg_dir)));

		reserve_early(__pa(xen_start_info->pt_base),
		__pa(xen_start_info->pt_base +
		xen_start_info->nr_pt_frames * PAGE_SIZE),
		"XEN PAGETABLES");

		return swapper_pg_dir;
		}
		#endif /* CONFIG_X86_64 */

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