On Mon, 12 Mar 2012 18:30:56 -0400 Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx> wrote: > Currently we can't do task migration among memory cgroups without THP split, > which means processes heavily using THP experience large overhead in task > migration. This patch introduces the code for moving charge of THP and makes > THP more valuable. > > Changes from v3: > - use enum mc_target_type and MC_TARGET_* explicitly > - replace lengthy name is_target_thp_for_mc() with get_mctgt_type_thp() > - drop cond_resched() > - drop mapcount check of page sharing (Hugh and KAMEZAWA-san are preparing > patches to change the behavior of moving charge of shared pages, so this > patch keeps up with the change to avoid potential conflict.) > > Changes from v2: > - add move_anon() and mapcount check > > Changes from v1: > - rename is_target_huge_pmd_for_mc() to is_target_thp_for_mc() > - remove pmd_present() check (it's buggy when pmd_trans_huge(pmd) is true) > - is_target_thp_for_mc() calls get_page() only when checks are passed > - unlock page table lock if !mc.precharge > - compare return value of is_target_thp_for_mc() explicitly to MC_TARGET_TYPE > - clean up &walk->mm->page_table_lock to &vma->vm_mm->page_table_lock > - add comment about why race with split_huge_page() does not happen > > Signed-off-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx> > Acked-by: Hillf Danton <dhillf@xxxxxxxxx> Thank you. Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> -- 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>