tree db1b4365b70fbe809753e6ac097b60fb4f7299a8
parent 9547d01bfb9c351dc19067f8a4cea9d3955f4125
author Andrea Arcangeli <aarcange@redhat.com> 1306282334 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1306337961 -0700

mm: thp: optimize memcg charge in khugepaged

We don't need to hold the mmmap_sem through mem_cgroup_newpage_charge(),
the mmap_sem is only hold for keeping the vma stable and we don't need the
vma stable anymore after we return from alloc_hugepage_vma().

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Johannes Weiner <jweiner@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Minchan Kim <minchan.kim@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>