If the hypervisor gives us an error on a hugepage insert we panic. The
normal page code already handles this by returning an error instead and we end
calling low_hash_fault which will just kill the task if possible.
The patch below does a similar thing for the hugepage case.
Signed-off-by: Anton Blanchard <an...@samba.org>
---
Index: powerpc.git/arch/powerpc/mm/hugetlbpage-hash64.c
===================================================================
--- powerpc.git.orig/arch/powerpc/mm/hugetlbpage-hash64.c 2010-07-15
15:24:19.520742137 +1000
+++ powerpc.git/arch/powerpc/mm/hugetlbpage-hash64.c 2010-07-15
15:24:30.343243050 +1000
@@ -121,8 +121,15 @@ repeat:
}
}
- if (unlikely(slot == -2))
- panic("hash_huge_page: pte_insert failed\n");
+ /*
+ * Hypervisor failure. Restore old pte and return -1
+ * similar to __hash_page_*
+ */
+ if (unlikely(slot == -2)) {
+ *ptep = __pte(old_pte);
+ err = -1;
+ goto out;
+ }
new_pte |= (slot << 12) & (_PAGE_F_SECOND | _PAGE_F_GIX);
}
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