Messages in this thread | | | From | KOSAKI Motohiro <> | Date | Sun, 24 Jun 2012 07:09:30 -0400 | Subject | Re: RFC: Easy-Reclaimable LRU list |
| |
On Sat, Jun 23, 2012 at 11:53 AM, Rik van Riel <riel@redhat.com> wrote: > On 06/23/2012 12:45 AM, Kamezawa Hiroyuki wrote: > >> I think this is interesting approach. Major concern is how to guarantee >> EReclaimable >> pages are really EReclaimable...Do you have any idea ? madviced pages >> are really EReclaimable ? > > I suspect the EReclaimable pages can only be clean page > cache pages that are not mapped by any processes. > > Once somebody tries to use the page, mark_page_accessed > will move it to another list.
100% agree.
>> A (very) small concern is will you use one more page-flags for this ? ;) > > This could be an issue on a 32 bit system, true.
Do we really need SwapBacked bit? Actually swap-backed is per-superblock attribute and don't change dynamically (i.e. no race happen). thus this bit might be able to move into page->mapping or page->mapping->host.
| |