tree 874b8dd5c2ebba6889621b14e01b7d503a098e4d
parent b4028260334e1ecf63fb5e0a95d65bb2db02c1ec
author Hugh Dickins <hugh.dickins@tiscali.co.uk> 1253577730 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1253629052 -0700

ksm: move pages_sharing updates

The pages_shared count is incremented and decremented when adding a node
to and removing a node from the stable tree: easy to understand.  But the
pages_sharing count was hard to follow, being adjusted in various places:
increment and decrement it when adding to and removing from the stable tree.

And the pages_sharing variable used to include the pages_shared, then those
were subtracted when shown in the pages_sharing sysfs file: now keep it as
an exclusive count of leaves hanging off the stable tree nodes, throughout.

Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Acked-by: Izik Eidus <ieidus@redhat.com>
Acked-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>