diff options
| author | Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> | 2012-03-21 16:33:55 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-21 17:54:56 -0700 |
| commit | cbde83e21c4fd50bfc4240408355c1e5d393063d (patch) | |
| tree | 21899d4db2dadcdaea04b019c7d9f1d62344f5b4 /arch | |
| parent | 4bfc130d5afa28395288d1b57092906349604b41 (diff) | |
| download | linux-cbde83e21c4fd50bfc4240408355c1e5d393063d.tar.bz2 | |
hugetlb: try to search again if it is really needed
Search again only if some holes may be skipped in the first pass.
[akpm@linux-foundation.org: clean up crazy compound definition]
Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Hillf Danton <dhillf@gmail.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/mm/hugetlbpage.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/x86/mm/hugetlbpage.c b/arch/x86/mm/hugetlbpage.c index 8ecbb4bba4b3..c20e81c3425d 100644 --- a/arch/x86/mm/hugetlbpage.c +++ b/arch/x86/mm/hugetlbpage.c @@ -309,9 +309,10 @@ 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; + 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; @@ -368,10 +371,9 @@ 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; } /* |