On Sat, Jun 23, 2012 at 11:53 AM, Rik van Riel <riel@xxxxxxxxxx> 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. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>