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| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2014-08-13 11:02:00 +0400 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2014-09-17 18:55:04 +0400 |
| commit | 4807eb30a3dcb8a95e34486e6a5af68ec7b0b823 (patch) | |
| tree | 5be1f99aa0ef02adb24221342b16e6ff9185247e /arch/powerpc/include/asm | |
| parent | 30da621f91f086da7964a3ad1233cfb722ba67f3 (diff) | |
| download | linux-4807eb30a3dcb8a95e34486e6a5af68ec7b0b823.tar.xz | |
powerpc/thp: Handle combo pages in invalidate
commit fc0479557572375100ef16c71170b29a98e0d69a upstream.
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.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'arch/powerpc/include/asm')
| -rw-r--r-- | arch/powerpc/include/asm/pgtable-ppc64.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/pgtable-ppc64.h b/arch/powerpc/include/asm/pgtable-ppc64.h index 46db09414a10..832a39d042d4 100644 --- a/arch/powerpc/include/asm/pgtable-ppc64.h +++ b/arch/powerpc/include/asm/pgtable-ppc64.h @@ -409,7 +409,7 @@ static inline char *get_hpte_slot_array(pmd_t *pmdp) } extern void hpte_do_hugepage_flush(struct mm_struct *mm, unsigned long addr, - pmd_t *pmdp); + pmd_t *pmdp, unsigned long old_pmd); #ifdef CONFIG_TRANSPARENT_HUGEPAGE extern pmd_t pfn_pmd(unsigned long pfn, pgprot_t pgprot); extern pmd_t mk_pmd(struct page *page, pgprot_t pgprot); |