Messages in this thread | | | Date | Mon, 3 Nov 2014 17:02:08 +0900 | From | Joonsoo Kim <> | Subject | Re: [patch 1/3] mm: embed the memcg pointer directly into struct page |
| |
On Sat, Nov 01, 2014 at 11:15:54PM -0400, Johannes Weiner wrote: > Memory cgroups used to have 5 per-page pointers. To allow users to > disable that amount of overhead during runtime, those pointers were > allocated in a separate array, with a translation layer between them > and struct page.
Hello, Johannes.
I'd like to leave this translation layer. Could you just disable that code with #ifdef until next user comes?
In our company, we uses PAGE_OWNER on mm tree which is the feature saying who allocates the page. To use PAGE_OWNER needs modifying struct page and then needs re-compile. This re-compile makes us difficult to use this feature. So, we decide to implement run-time configurable PAGE_OWNER through page_cgroup's translation layer code. Moreover, with this infrastructure, I plan to implement some other debugging feature.
Because of my laziness, it didn't submitted to LKML. But, I will submit it as soon as possible. If the code is removed, I would copy-and-paste the code, but, it would cause lose of the history on that code. So if possible, I'd like to leave that code now.
Thanks.
| |