tree 5e515efa116f3968c2caa75bc691a197199313a8
parent 4c21e2f2441dc5fbb957b030333f5a3f2d02dea7
author Hugh Dickins <hugh@veritas.com> 1130635001 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> 1130647242 -0700

[PATCH] mm: fix rss and mmlist locking

A couple of oddities were guarded by page_table_lock, no longer properly
guarded when that is split.

The mm_counters of file_rss and anon_rss: make those an atomic_t, or an
atomic64_t if the architecture supports it, in such a case.  Definitions by
courtesy of Christoph Lameter: who spent considerable effort on more scalable
ways of counting, but found insufficient benefit in practice.

And adding an mm with swap to the mmlist for swapoff: the list is well-
guarded by its own lock, but the list_empty check now has to be repeated
inside it.

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