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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2014-08-13 12:32:00 +0530
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2014-08-13 18:20:39 +1000
commitfc0479557572375100ef16c71170b29a98e0d69a (patch)
tree89c0b9da580f2b47bcc8663deb02323052f5025b /arch/powerpc/mm/tlb_hash64.c
parent629149fae478f0ac6bf705a535708b192e9c6b59 (diff)
downloadlinux-fc0479557572375100ef16c71170b29a98e0d69a.tar.bz2
powerpc/thp: Handle combo pages in invalidate
If we changed base page size of the segment, either via sub_page_protect or via remap_4k_pfn, we do a demote_segment which doesn't flush the hash table entries. We do a lazy hash page table flush for all mapped pages in the demoted segment. This happens when we handle hash page fault for these pages. We use _PAGE_COMBO bit along with _PAGE_HASHPTE to indicate whether a pte is backed by 4K hash pte. If we find _PAGE_COMBO not set on the pte, that implies that we could possibly have older 64K hash pte entries in the hash page table and we need to invalidate those entries. Use _PAGE_COMBO to determine the page size with which we should invalidate the hash table entries on unmap. CC: <stable@vger.kernel.org> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/mm/tlb_hash64.c')
-rw-r--r--arch/powerpc/mm/tlb_hash64.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/mm/tlb_hash64.c b/arch/powerpc/mm/tlb_hash64.c
index c99f6510a0b2..9adda5790463 100644
--- a/arch/powerpc/mm/tlb_hash64.c
+++ b/arch/powerpc/mm/tlb_hash64.c
@@ -216,7 +216,7 @@ void __flush_hash_table_range(struct mm_struct *mm, unsigned long start,
if (!(pte & _PAGE_HASHPTE))
continue;
if (unlikely(hugepage_shift && pmd_trans_huge(*(pmd_t *)pte)))
- hpte_do_hugepage_flush(mm, start, (pmd_t *)pte);
+ hpte_do_hugepage_flush(mm, start, (pmd_t *)ptep, pte);
else
hpte_need_flush(mm, start, ptep, pte, 0);
}