The patch titled
Subject: mm: use vm_unmapped_area() in hugetlbfs
has been added to the -mm tree. Its filename is
mm-use-vm_unmapped_area-in-hugetlbfs.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Michel Lespinasse <walken@xxxxxxxxxx>
Subject: mm: use vm_unmapped_area() in hugetlbfs
Update the hugetlb_get_unmapped_area function to make use of
vm_unmapped_area() instead of implementing a brute force search.
Signed-off-by: Michel Lespinasse <walken@xxxxxxxxxx>
Reviewed-by: Rik van Riel <riel@xxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Russell King <linux@xxxxxxxxxxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: Paul Mundt <lethal@xxxxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Chris Metcalf <cmetcalf@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/hugetlbfs/inode.c | 42 +++++++----------------------------------
1 file changed, 8 insertions(+), 34 deletions(-)
diff -puN fs/hugetlbfs/inode.c~mm-use-vm_unmapped_area-in-hugetlbfs fs/hugetlbfs/inode.c
--- a/fs/hugetlbfs/inode.c~mm-use-vm_unmapped_area-in-hugetlbfs
+++ a/fs/hugetlbfs/inode.c
@@ -151,8 +151,8 @@ hugetlb_get_unmapped_area(struct file *f
{
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma;
- unsigned long start_addr;
struct hstate *h = hstate_file(file);
+ struct vm_unmapped_area_info info;
if (len & ~huge_page_mask(h))
return -EINVAL;
@@ -173,39 +173,13 @@ hugetlb_get_unmapped_area(struct file *f
return addr;
}
- if (len > mm->cached_hole_size)
- start_addr = mm->free_area_cache;
- else {
- start_addr = TASK_UNMAPPED_BASE;
- mm->cached_hole_size = 0;
- }
-
-full_search:
- addr = ALIGN(start_addr, huge_page_size(h));
-
- for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
- /* At this point: (!vma || addr < vma->vm_end). */
- if (TASK_SIZE - len < addr) {
- /*
- * Start a new search - just in case we missed
- * some holes.
- */
- if (start_addr != TASK_UNMAPPED_BASE) {
- start_addr = TASK_UNMAPPED_BASE;
- mm->cached_hole_size = 0;
- goto full_search;
- }
- return -ENOMEM;
- }
-
- if (!vma || addr + len <= vma->vm_start) {
- mm->free_area_cache = addr + len;
- return addr;
- }
- if (addr + mm->cached_hole_size < vma->vm_start)
- mm->cached_hole_size = vma->vm_start - addr;
- addr = ALIGN(vma->vm_end, huge_page_size(h));
- }
+ info.flags = 0;
+ info.length = len;
+ info.low_limit = TASK_UNMAPPED_BASE;
+ info.high_limit = TASK_SIZE;
+ info.align_mask = PAGE_MASK & ~huge_page_mask(h);
+ info.align_offset = 0;
+ return vm_unmapped_area(&info);
}
#endif
_
Patches currently in -mm which might be from walken@xxxxxxxxxx are
linux-next.patch
mm-add-anon_vma_lock-to-validate_mm.patch
mm-augment-vma-rbtree-with-rb_subtree_gap.patch
mm-check-rb_subtree_gap-correctness.patch
mm-check-rb_subtree_gap-correctness-fix.patch
mm-rearrange-vm_area_struct-for-fewer-cache-misses.patch
mm-rearrange-vm_area_struct-for-fewer-cache-misses-checkpatch-fixes.patch
mm-vm_unmapped_area-lookup-function.patch
mm-vm_unmapped_area-lookup-function-checkpatch-fixes.patch
mm-use-vm_unmapped_area-on-x86_64-architecture.patch
mm-fix-cache-coloring-on-x86_64-architecture.patch
mm-use-vm_unmapped_area-in-hugetlbfs.patch
mm-use-vm_unmapped_area-in-hugetlbfs-on-i386-architecture.patch
mm-use-vm_unmapped_area-on-mips-architecture.patch
mm-use-vm_unmapped_area-on-mips-architecture-fix.patch
mm-use-vm_unmapped_area-on-arm-architecture.patch
mm-use-vm_unmapped_area-on-arm-architecture-fix.patch
mm-use-vm_unmapped_area-on-sh-architecture.patch
mm-use-vm_unmapped_area-on-sh-architecture-fix.patch
mm-use-vm_unmapped_area-on-sparc64-architecture.patch
mm-use-vm_unmapped_area-on-sparc64-architecture-fix.patch
mm-use-vm_unmapped_area-in-hugetlbfs-on-sparc64-architecture.patch
mm-use-vm_unmapped_area-on-sparc32-architecture.patch
mm-use-vm_unmapped_area-in-hugetlbfs-on-tile-architecture.patch
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