On Mon, Jul 09, 2012 at 01:01:00AM +0200, Johannes Weiner wrote: > On Sun, Jul 08, 2012 at 10:44:59PM +0800, Fengguang Wu wrote: > > On Tue, Jul 03, 2012 at 03:31:26PM +0900, KAMEZAWA Hiroyuki wrote: > > > (2012/06/28 20:05), Sha Zhengju wrote: > > > > From: Sha Zhengju <handai.szj@xxxxxxxxxx> > > > > > > > > Similar to dirty page, we add per cgroup writeback pages accounting. The lock > > > > rule still is: > > > > mem_cgroup_begin_update_page_stat() > > > > modify page WRITEBACK stat > > > > mem_cgroup_update_page_stat() > > > > mem_cgroup_end_update_page_stat() > > > > > > > > There're two writeback interface to modify: test_clear/set_page_writeback. > > > > > > > > Signed-off-by: Sha Zhengju <handai.szj@xxxxxxxxxx> > > > > > > Seems good to me. BTW, you named macros as MEM_CGROUP_STAT_FILE_XXX > > > but I wonder these counters will be used for accounting swap-out's dirty pages.. > > > > > > STAT_DIRTY, STAT_WRITEBACK ? do you have better name ? > > > > Perhaps we can follow the established "enum zone_stat_item" names: > > > > NR_FILE_DIRTY, > > NR_WRITEBACK, > > > > s/NR_/MEM_CGROUP_STAT_/ > > > > The names indicate that dirty pages for anonymous pages are not > > accounted (by __set_page_dirty_no_writeback()). While the writeback > > pages accounting include both the file/anon pages. > > > > Ah then we'll need to update the document in patch 0 accordingly. This > > may sound a bit tricky to the users.. > > We already report the global one as "nr_dirty", though. Please don't > give the memcg one a different name. > > The enum naming is not too critical, but it would be nice to have it > match the public name. Fair enough. The public name obviously has more weight :) Thanks, Fengguang -- 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>