On Mon, 31 Jan 2011, Dave Hansen wrote: > I'm working on some more reports that transparent huge pages and > KSM do not play nicely together. Basically, whenever THP's are > present along with KSM, there is a lot of attrition over time, > and we do not see much overall progress keeping THP's around: > > http://sr71.net/~dave/ibm/038_System_Anonymous_Pages.png > > (That's Karl Rister's graph, thanks Karl!) > > However, I realized that we do not currently have a nice way to > find out where individual THP's might be on the system. We > have an overall count, but no way of telling which processes or > VMAs they might be in. > > I started to implement this in the /proc/$pid/smaps code, but > quickly realized that the lib/pagewalk.c code unconditionally > splits THPs up. This set reworks that code a bit and, in the > end, gives you a per-map count of the numbers of huge pages. > It also makes it possible for page walks to _not_ split THPs. > Nice! I'd like to start using this patchset immediately, I'm hoping you'll re-propose it with the fixes soon. Thanks Dave. -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
