[RFC PATCH 8/9] powerpc: mm: Support setting _PAGE_NUMA bit on pmd entry which are pointer to PTE page
From: Aneesh Kumar K.V <hidden>
Date: 2013-10-22 11:41:33
Also in:
linux-mm
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
From: "Aneesh Kumar K.V" <redacted> Signed-off-by: Aneesh Kumar K.V <redacted> --- arch/powerpc/include/asm/pgtable-ppc64.h | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/include/asm/pgtable-ppc64.h b/arch/powerpc/include/asm/pgtable-ppc64.h
index 46db094..f828944 100644
--- a/arch/powerpc/include/asm/pgtable-ppc64.h
+++ b/arch/powerpc/include/asm/pgtable-ppc64.h@@ -150,8 +150,22 @@ #define pmd_set(pmdp, pmdval) (pmd_val(*(pmdp)) = (pmdval)) #define pmd_none(pmd) (!pmd_val(pmd)) -#define pmd_bad(pmd) (!is_kernel_addr(pmd_val(pmd)) \ - || (pmd_val(pmd) & PMD_BAD_BITS)) + +static inline int pmd_bad(pmd_t pmd) +{ +#ifdef CONFIG_NUMA_BALANCING + /* + * For numa balancing we can have this set + */ + if (pmd_val(pmd) & _PAGE_NUMA) + return 0; +#endif + if (!is_kernel_addr(pmd_val(pmd)) || + (pmd_val(pmd) & PMD_BAD_BITS)) + return 1; + return 0; +} + #define pmd_present(pmd) (pmd_val(pmd) != 0) #define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0) #define pmd_page_vaddr(pmd) (pmd_val(pmd) & ~PMD_MASKED_BITS)
--
1.8.3.2