Commit 25356cfa authored Oct 13, 2020 by Alexander Gordeev Committed by Linus Torvalds Oct 13, 2020

docs/vm: fix 'mm_count' vs 'mm_users' counter confusion



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".

Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Link: https://lkml.kernel.org/r/1597040695-32633-1-git-send-email-agordeev@linux.ibm.com


Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 74640617

Documentation/vm/active_mm.rst

+1 −1

Original line number	Diff line number	Diff line
		@@ -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