On Wed, 17 Aug 2011 09:15:01 -0700 Greg Thelen <gthelen@xxxxxxxxxx> wrote: > Introduce memcg routines to assist in per-memcg writeback: > > - mem_cgroups_over_bground_dirty_thresh() determines if any cgroups need > writeback because they are over their dirty memory threshold. > > - should_writeback_mem_cgroup_inode() will be called by writeback to > determine if a particular inode should be written back. The answer > depends on the writeback context (foreground, background, > try_to_free_pages, etc.). > > - mem_cgroup_writeback_done() is used periodically during writeback to > update memcg writeback data. > > These routines make use of a new over_bground_dirty_thresh bitmap that > indicates which mem_cgroup are over their respective dirty background > threshold. As this bitmap is indexed by css_id, the largest possible > css_id value is needed to create the bitmap. So move the definition of > CSS_ID_MAX from cgroup.c to cgroup.h. This allows users of css_id() to > know the largest possible css_id value. This knowledge can be used to > build such per-cgroup bitmaps. > > Make determine_dirtyable_memory() non-static because it is needed by > mem_cgroup_writeback_done(). > > Signed-off-by: Greg Thelen <gthelen@xxxxxxxxxx> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>