[Xen-devel] [PATCH 4/5] xen/i386: reserve Xen pagetables

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

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.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
---
arch/x86/xen/mmu.c |    5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 9842b12..e25a78e 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -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 */
--
1.6.0.6




_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel