tree 4f21583bb1441e5555ed199a40d5f679bb4506e9
parent 4294621f41a85497019fae64341aa5351a1921b7
author Hugh Dickins <hugh@veritas.com> 1130634965 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> 1130647238 -0700

[PATCH] mm: batch updating mm_counters

tlb_finish_mmu used to batch zap_pte_range's update of mm rss, which may be
worthwhile if the mm is contended, and would reduce atomic operations if the
counts were atomic.  Let zap_pte_range now batch its updates to file_rss and
anon_rss, per page-table in case we drop the lock outside; and copy_pte_range
batch them too.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>