[PATCH] docs/vm: fix 'mm_count' vs 'mm_users' counter confusion

From: Alexander Gordeev
Date: Mon Aug 10 2020 - 02:25:08 EST

In the context of the anonymous address space lifespan
description the 'mm_users' reference counter is confused
with 'mm_count'. I.e a "zombie" mm gets released when
"mm_count" becomes zero, not "mm_users".

Cc: Jonathan Corbet <corbet@xxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Alexander Gordeev <agordeev@xxxxxxxxxxxxx>
Documentation/vm/active_mm.rst | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/vm/active_mm.rst b/Documentation/vm/active_mm.rst
index c84471b..6f8269c 100644
--- a/Documentation/vm/active_mm.rst
+++ b/Documentation/vm/active_mm.rst
@@ -64,7 +64,7 @@ Active MM
actually get cases where you have a address space that is _only_ used by
lazy users. That is often a short-lived state, because once that thread
gets scheduled away in favour of a real thread, the "zombie" mm gets
- released because "mm_users" becomes zero.
+ released because "mm_count" becomes zero.

Also, a new rule is that _nobody_ ever has "init_mm" as a real MM any
more. "init_mm" should be considered just a "lazy context when no other