On Mon, Mar 15, 2010 at 09:06:38AM +0900, KAMEZAWA Hiroyuki wrote: > On Mon, 15 Mar 2010 00:26:38 +0100 > Andrea Righi <arighi@xxxxxxxxxxx> wrote: > > > From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> > > > > Now, file-mapped is maintaiend. But more generic update function > > will be needed for dirty page accounting. > > > > For accountig page status, we have to guarantee lock_page_cgroup() > > will be never called under tree_lock held. > > To guarantee that, we use trylock at updating status. > > By this, we do fuzzy accounting, but in almost all case, it's correct. > > > > Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> > > Bad patch title...."use trylock for safe accounting in some contexts" ? OK, sounds better. I just copy & paste the email subject, but the title was probably related to the old lock_page_cgroup()+irq_disable patch. Thanks, -Andrea -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>