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authorAnton Arapov <anton@redhat.com>2012-06-08 12:58:00 +0200
committerAnton Arapov <anton@redhat.com>2012-06-08 12:58:00 +0200
commit6792a3f47a2e42d7164292bf7f1a55cfc4c91652 (patch)
treeb90c002bfbbeaec92f5d8a2383dcabf6524016f7 /arch/x86/mm/hugetlbpage.c
parentfe2895d3d55146cac65b273c0f83e2c7e543cd0e (diff)
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fedora kernel: b920e9b748c595f970bf80ede7832d39f8d567dav3.4.1-2
Signed-off-by: Anton Arapov <anton@redhat.com>
Diffstat (limited to 'arch/x86/mm/hugetlbpage.c')
-rw-r--r--arch/x86/mm/hugetlbpage.c28
1 files changed, 11 insertions, 17 deletions
diff --git a/arch/x86/mm/hugetlbpage.c b/arch/x86/mm/hugetlbpage.c
index 8ecbb4bba4b..f6679a7fb8c 100644
--- a/arch/x86/mm/hugetlbpage.c
+++ b/arch/x86/mm/hugetlbpage.c
@@ -308,10 +308,11 @@ static unsigned long hugetlb_get_unmapped_area_topdown(struct file *file,
{
struct hstate *h = hstate_file(file);
struct mm_struct *mm = current->mm;
- struct vm_area_struct *vma, *prev_vma;
- unsigned long base = mm->mmap_base, addr = addr0;
+ struct vm_area_struct *vma;
+ unsigned long base = mm->mmap_base;
+ unsigned long addr = addr0;
unsigned long largest_hole = mm->cached_hole_size;
- int first_time = 1;
+ unsigned long start_addr;
/* don't allow allocations above current base */
if (mm->free_area_cache > base)
@@ -322,6 +323,8 @@ static unsigned long hugetlb_get_unmapped_area_topdown(struct file *file,
mm->free_area_cache = base;
}
try_again:
+ start_addr = mm->free_area_cache;
+
/* make sure it can fit in the remaining address space */
if (mm->free_area_cache < len)
goto fail;
@@ -337,22 +340,14 @@ try_again:
if (!vma)
return addr;
- /*
- * new region fits between prev_vma->vm_end and
- * vma->vm_start, use it:
- */
- prev_vma = vma->vm_prev;
- if (addr + len <= vma->vm_start &&
- (!prev_vma || (addr >= prev_vma->vm_end))) {
+ if (addr + len <= vma->vm_start) {
/* remember the address as a hint for next time */
mm->cached_hole_size = largest_hole;
return (mm->free_area_cache = addr);
- } else {
+ } else if (mm->free_area_cache == vma->vm_end) {
/* pull free_area_cache down to the first hole */
- if (mm->free_area_cache == vma->vm_end) {
- mm->free_area_cache = vma->vm_start;
- mm->cached_hole_size = largest_hole;
- }
+ mm->free_area_cache = vma->vm_start;
+ mm->cached_hole_size = largest_hole;
}
/* remember the largest hole we saw so far */
@@ -368,10 +363,9 @@ fail:
* if hint left us with no space for the requested
* mapping then try again:
*/
- if (first_time) {
+ if (start_addr != base) {
mm->free_area_cache = base;
largest_hole = 0;
- first_time = 0;
goto try_again;
}
/*