svn commit: r253594 - user/attilio/vmobj-readlock/sys/vm
Attilio Rao
attilio at FreeBSD.org
Wed Jul 24 07:46:16 UTC 2013
Author: attilio
Date: Wed Jul 24 07:46:15 2013
New Revision: 253594
URL: http://svnweb.freebsd.org/changeset/base/253594
Log:
Remove wrong comment.
Sponsored by: EMC / Isilon storage division
Reported by: jeff
Modified:
user/attilio/vmobj-readlock/sys/vm/vm_page.h
Modified: user/attilio/vmobj-readlock/sys/vm/vm_page.h
==============================================================================
--- user/attilio/vmobj-readlock/sys/vm/vm_page.h Wed Jul 24 07:15:08 2013 (r253593)
+++ user/attilio/vmobj-readlock/sys/vm/vm_page.h Wed Jul 24 07:46:15 2013 (r253594)
@@ -109,16 +109,6 @@
* contains the dirty field. In the machine-independent layer,
* the implementation of read-modify-write operations on the
* field is encapsulated in vm_page_clear_dirty_mask().
- *
- * Page content access is regulated (mostly) by the busy mechanism.
- * When the page content is changing (for example, during a page READ
- * operation) the page owner must acquire an write busy token. Similarly,
- * when the page content is just being accessed for reading purposes
- * (for example, during a page WRITE operation) the page owner must
- * acquire a read busy token.
- * The busy mechanism is regulated by the vm_page_busy_*() family of
- * primitives and it follows a reader/writer lock pattern as the names
- * suggest.
*/
#if PAGE_SIZE == 4096
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