[Xen-devel] [PATCH] Balloon driver crash

[M A Young <m.a.young@xxxxxxxxxxxx>]

This patch fixes an error in commit f4685d0ed041523d1bd5124c5872459681aca876
"Add hugepage support to balloon driver" that was causing the balloon 
driver to crash when shrinking the memory used by Domain-0.
Signed-off-by: Michael Young <m.a.young@xxxxxxxxxxxx>

--- linux-2.6.32.x86_64/drivers/xen/balloon.c.orig      2010-06-05 
22:43:11.000000000 +0100
+++ linux-2.6.32.x86_64/drivers/xen/balloon.c   2010-06-05 22:47:03.000000000 
+0100
@@ -340,7 +340,7 @@
                                discontig_free = 1;

                        set_phys_to_machine(lpfn, INVALID_P2M_ENTRY);
-                       if (!PageHighMem(page)) {
+                       if (!PageHighMem(pfn_to_page(lpfn))) {
                                ret = HYPERVISOR_update_va_mapping(
                                        (unsigned long)__va(lpfn << PAGE_SHIFT),
                                        __pte_ma(0), 0);

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