The patch titled
thp: madvise(MADV_HUGEPAGE)
has been removed from the -mm tree. Its filename was
thp-madvisemadv_hugepage.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: thp: madvise(MADV_HUGEPAGE)
From: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Add madvise MADV_HUGEPAGE to mark regions that are important to be
hugepage backed. Return -EINVAL if the vma is not of an anonymous type,
or the feature isn't built into the kernel. Never silently return
success.
Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Acked-by: Rik van Riel <riel@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/huge_mm.h | 6 ++++++
mm/huge_memory.c | 16 ++++++++++++++++
mm/madvise.c | 8 ++++++++
3 files changed, 30 insertions(+)
diff -puN include/linux/huge_mm.h~thp-madvisemadv_hugepage include/linux/huge_mm.h
--- a/include/linux/huge_mm.h~thp-madvisemadv_hugepage
+++ a/include/linux/huge_mm.h
@@ -97,6 +97,7 @@ extern void __split_huge_page_pmd(struct
#if HPAGE_PMD_ORDER > MAX_ORDER
#error "hugepages can't be allocated by the buddy allocator"
#endif
+extern int hugepage_madvise(unsigned long *vm_flags);
#else /* CONFIG_TRANSPARENT_HUGEPAGE */
#define HPAGE_PMD_SHIFT ({ BUG(); 0; })
#define HPAGE_PMD_MASK ({ BUG(); 0; })
@@ -113,6 +114,11 @@ static inline int split_huge_page(struct
do { } while (0)
#define wait_split_huge_page(__anon_vma, __pmd) \
do { } while (0)
+static inline int hugepage_madvise(unsigned long *vm_flags)
+{
+ BUG();
+ return 0;
+}
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
#endif /* _LINUX_HUGE_MM_H */
diff -puN mm/huge_memory.c~thp-madvisemadv_hugepage mm/huge_memory.c
--- a/mm/huge_memory.c~thp-madvisemadv_hugepage
+++ a/mm/huge_memory.c
@@ -896,6 +896,22 @@ out:
return ret;
}
+int hugepage_madvise(unsigned long *vm_flags)
+{
+ /*
+ * Be somewhat over-protective like KSM for now!
+ */
+ if (*vm_flags & (VM_HUGEPAGE | VM_SHARED | VM_MAYSHARE |
+ VM_PFNMAP | VM_IO | VM_DONTEXPAND |
+ VM_RESERVED | VM_HUGETLB | VM_INSERTPAGE |
+ VM_MIXEDMAP | VM_SAO))
+ return -EINVAL;
+
+ *vm_flags |= VM_HUGEPAGE;
+
+ return 0;
+}
+
void __split_huge_page_pmd(struct mm_struct *mm, pmd_t *pmd)
{
struct page *page;
diff -puN mm/madvise.c~thp-madvisemadv_hugepage mm/madvise.c
--- a/mm/madvise.c~thp-madvisemadv_hugepage
+++ a/mm/madvise.c
@@ -71,6 +71,11 @@ static long madvise_behavior(struct vm_a
if (error)
goto out;
break;
+ case MADV_HUGEPAGE:
+ error = hugepage_madvise(&new_flags);
+ if (error)
+ goto out;
+ break;
}
if (new_flags == vma->vm_flags) {
@@ -283,6 +288,9 @@ madvise_behavior_valid(int behavior)
case MADV_MERGEABLE:
case MADV_UNMERGEABLE:
#endif
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+ case MADV_HUGEPAGE:
+#endif
return 1;
default:
_
Patches currently in -mm which might be from aarcange@xxxxxxxxxx are
origin.patch
thp-add-pagetranscompound.patch
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