Limit the number of gigantic hugepages specified by the
hugepages= parameter to MAX_NUMBER_GPAGES.
Signed-off-by: James Yang <james.y...@freescale.com>
---
arch/powerpc/mm/hugetlbpage.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c
index d67db4b..5ef84a2 100644
--- a/arch/powerpc/mm/hugetlbpage.c
+++ b/arch/powerpc/mm/hugetlbpage.c
@@ -362,6 +362,13 @@ static int __init do_gpage_early_setup(char *param, char
*val,
if (size != 0) {
if (sscanf(val, "%lu", &npages) <= 0)
npages = 0;
+ if (npages > MAX_NUMBER_GPAGES) {
+ pr_warn("MMU: %lu pages requested for page "
+ "size %llu KB, limiting to "
+ __stringify(MAX_NUMBER_GPAGES) "\n",
+ npages, size / 1024);
+ npages = MAX_NUMBER_GPAGES;
+ }
gpage_npages[shift_to_mmu_psize(__ffs(size))] = npages;
size = 0;
}
--
1.7.0.4
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