Messages in this thread | | | Date | Thu, 3 Feb 2011 13:54:56 -0800 (PST) | From | David Rientjes <> | Subject | Re: [RFC][PATCH 0/6] more detailed per-process transparent hugepage statistics |
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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.
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