From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
To: benh@kernel.crashing.org, paulus@samba.org, linux-mm@kvack.org
Cc: linuxppc-dev@lists.ozlabs.org,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Subject: [RFC PATCH 8/9] powerpc: mm: Support setting _PAGE_NUMA bit on pmd entry which are pointer to PTE page
Date: Tue, 22 Oct 2013 16:58:19 +0530 [thread overview]
Message-ID: <1382441300-1513-9-git-send-email-aneesh.kumar@linux.vnet.ibm.com> (raw)
In-Reply-To: <1382441300-1513-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
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
next prev parent reply other threads:[~2013-10-22 11:41 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-22 11:28 [RFC PATCH 0/9] powerpc: mm: Numa faults support for ppc64 Aneesh Kumar K.V
2013-10-22 11:28 ` [RFC PATCH 1/9] powerpc: Use HPTE constants when updating hpte bits Aneesh Kumar K.V
2013-10-22 11:28 ` [RFC PATCH 2/9] powerpc: Free up _PAGE_COHERENCE for numa fault use later Aneesh Kumar K.V
2013-10-22 11:28 ` [RFC PATCH 3/9] mm: Move change_prot_numa outside CONFIG_ARCH_USES_NUMA_PROT_NONE Aneesh Kumar K.V
2013-10-22 11:28 ` [RFC PATCH 4/9] powerpc: mm: Only check for _PAGE_PRESENT in set_pte/pmd functions Aneesh Kumar K.V
2013-10-22 11:28 ` [RFC PATCH 5/9] powerpc: mm: book3s: Enable _PAGE_NUMA for book3s Aneesh Kumar K.V
2013-10-22 11:28 ` [RFC PATCH 6/9] powerpc: mm: book3s: Disable hugepaged pmd format " Aneesh Kumar K.V
2013-10-22 11:28 ` [RFC PATCH 7/9] mm: numafaults: Use change_pmd_protnuma for updating _PAGE_NUMA for regular pmds Aneesh Kumar K.V
2013-10-22 11:28 ` Aneesh Kumar K.V [this message]
2013-10-22 11:28 ` [RFC PATCH 9/9] powerpc: mm: Enable numa faulting for hugepages Aneesh Kumar K.V
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