[PATCH 11/35] autonuma: core autonuma.h header

Andrea Arcangeli
2012-05-25T17:03:44Z

This is the generic autonuma.h header that defines the generic
AutoNUMA specific functions like autonuma_setup_new_exec,
autonuma_split_huge_page, numa_hinting_fault, etc...

As usual functions like numa_hinting_fault that only matter for builds
with CONFIG_AUTONUMA=y are defined unconditionally, but they are only
linked into the kernel if CONFIG_AUTONUMA=n. Their call sites are
optimized away at build time (or kernel won't link).

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
---
include/linux/autonuma.h | 41 +++++++++++++++++++++++++++++++++++++++++
1 files changed, 41 insertions(+), 0 deletions(-)
create mode 100644 include/linux/autonuma.h

diff --git a/include/linux/autonuma.h b/include/linux/autonuma.h
new file mode 100644
index 0000000..a963dcb
--- /dev/null
+++ b/include/linux/autonuma.h
@@ -0,0 +1,41 @@
+#ifndef _LINUX_AUTONUMA_H
+#define _LINUX_AUTONUMA_H
+
+#ifdef CONFIG_AUTONUMA
+
+#include <linux/autonuma_flags.h>
+
+extern void autonuma_enter(struct mm_struct *mm);
+extern void autonuma_exit(struct mm_struct *mm);
+extern void __autonuma_migrate_page_remove(struct page *page);
+extern void autonuma_migrate_split_huge_page(struct page *page,
+ struct page *page_tail);
+extern void autonuma_setup_new_exec(struct task_struct *p);
+
+static inline void autonuma_migrate_page_remove(struct page *page)
+{
+ if (ACCESS_ONCE(page->autonuma_migrate_nid) >= 0)
+ __autonuma_migrate_page_remove(page);
+}
+
+#define autonuma_printk(format, args...) \
+ if (autonuma_debug()) printk(format, ##args)
+
+#else /* CONFIG_AUTONUMA */
+
+static inline void autonuma_enter(struct mm_struct *mm) {}
+static inline void autonuma_exit(struct mm_struct *mm) {}
+static inline void autonuma_migrate_page_remove(struct page *page) {}
+static inline void autonuma_migrate_split_huge_page(struct page *page,
+ struct page *page_tail) {}
+static inline void autonuma_setup_new_exec(struct task_struct *p) {}
+
+#endif /* CONFIG_AUTONUMA */
+
+extern pte_t __pte_numa_fixup(struct mm_struct *mm, struct vm_area_struct *vma,
+ unsigned long addr, pte_t pte, pte_t *ptep);
+extern void __pmd_numa_fixup(struct mm_struct *mm, struct vm_area_struct *vma,
+ unsigned long addr, pmd_t *pmd);
+extern void numa_hinting_fault(struct page *page, int numpages);
+
+#endif /* _LINUX_AUTONUMA_H */