Messages in this thread |  | | Date | Wed, 28 Sep 2011 16:18:05 +0900 | | From | KAMEZAWA Hiroyuki <> | | Subject | Re: [PATCH 3/9] kstaled: page_referenced_kstaled() and supporting infrastructure. |
| |
On Tue, 27 Sep 2011 17:49:01 -0700 Michel Lespinasse <walken@google.com> wrote:
> Add a new page_referenced_kstaled() interface. The desired behavior > is that page_referenced() returns page references since the last > page_referenced() call, and page_referenced_kstaled() returns page > references since the last page_referenced_kstaled() call, but they > are both independent of each other and do not influence each other. > > The following events are counted as kstaled page references: > - CPU data access to the page (as noticed through pte_young()); > - mark_page_accessed() calls; > - page being freed / reallocated. > > > Signed-off-by: Michel Lespinasse <walken@google.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
2 questions.
What happens at Transparent HugeTLB pages are splitted/collapsed ? Does this feature can ignore page migration i.e. flags should not be copied ?
Thanks, -Kame
|  |