Hi, here is v2 (still RFC again because I changed many parts.) I'd like to post v3 without 'RFC' tag after Lsf-MM Summit. This series is for reducing size of 'struct page_cgroup' to 8 bytes. v2 contains 6 patches and did clean-ups and fixes race in v1 and adds a trial to integrate struct page_cgroup into struct page. each patches are... 1/6 ....add methods to access pc->mem_cgroup 2/6 ....add pc_set_mem_cgroup_and_flags() to set ->mem_cgroup and flags by one call. 3/6 ....add PageCgroupReset() for handling a race. 4/6 ....reduce size of struct page_cgroup by removing ->mem_cgroup 5/6 ....remove unnecessary memory barrier 6/6 ....add CONFIG_INTEGRATED_PAGE_CGROUP to place page_cgroup in struct page. Regards, -Kame -- 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>