The patch titled Subject: mm: memcg: move pc lookup point to commit_charge() has been removed from the -mm tree. Its filename was mm-memcg-move-pc-lookup-point-to-commit_charge.patch This patch was dropped because it was merged into mainline or a subsystem tree The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ From: Johannes Weiner <hannes@xxxxxxxxxxx> Subject: mm: memcg: move pc lookup point to commit_charge() None of the callsites actually need the page_cgroup descriptor themselves, so just pass the page and do the look up in there. We already had two bugs: 6568d4a ("mm: memcg: update the correct soft limit tree during migration") and 9b7f43afd4 ("memcg: fix Bad page state after replace_page_cache") where the passed page and pc were not referring to the same page frame. Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx> Acked-by: Hugh Dickins <hughd@xxxxxxxxxx> Cc: Miklos Szeredi <mszeredi@xxxxxxx> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> Cc: Michal Hocko <mhocko@xxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/memcontrol.c | 17 +++++------------ 1 file changed, 5 insertions(+), 12 deletions(-) diff -puN mm/memcontrol.c~mm-memcg-move-pc-lookup-point-to-commit_charge mm/memcontrol.c --- a/mm/memcontrol.c~mm-memcg-move-pc-lookup-point-to-commit_charge +++ a/mm/memcontrol.c @@ -2470,10 +2470,10 @@ struct mem_cgroup *try_get_mem_cgroup_fr static void __mem_cgroup_commit_charge(struct mem_cgroup *memcg, struct page *page, unsigned int nr_pages, - struct page_cgroup *pc, enum charge_type ctype, bool lrucare) { + struct page_cgroup *pc = lookup_page_cgroup(page); struct zone *uninitialized_var(zone); bool was_on_lru = false; bool anon; @@ -2710,7 +2710,6 @@ static int mem_cgroup_charge_common(stru { struct mem_cgroup *memcg = NULL; unsigned int nr_pages = 1; - struct page_cgroup *pc; bool oom = true; int ret; @@ -2724,11 +2723,10 @@ static int mem_cgroup_charge_common(stru oom = false; } - pc = lookup_page_cgroup(page); ret = __mem_cgroup_try_charge(mm, gfp_mask, nr_pages, &memcg, oom); if (ret == -ENOMEM) return ret; - __mem_cgroup_commit_charge(memcg, page, nr_pages, pc, ctype, false); + __mem_cgroup_commit_charge(memcg, page, nr_pages, ctype, false); return 0; } @@ -2825,16 +2823,13 @@ static void __mem_cgroup_commit_charge_swapin(struct page *page, struct mem_cgroup *memcg, enum charge_type ctype) { - struct page_cgroup *pc; - if (mem_cgroup_disabled()) return; if (!memcg) return; cgroup_exclude_rmdir(&memcg->css); - pc = lookup_page_cgroup(page); - __mem_cgroup_commit_charge(memcg, page, 1, pc, ctype, true); + __mem_cgroup_commit_charge(memcg, page, 1, ctype, true); /* * Now swap is on-memory. This means this page may be * counted both as mem and swap....double count. @@ -3450,14 +3445,13 @@ int mem_cgroup_prepare_migration(struct * page. In the case new page is migrated but not remapped, new page's * mapcount will be finally 0 and we call uncharge in end_migration(). */ - pc = lookup_page_cgroup(newpage); if (PageAnon(page)) ctype = MEM_CGROUP_CHARGE_TYPE_MAPPED; else if (page_is_file_cache(page)) ctype = MEM_CGROUP_CHARGE_TYPE_CACHE; else ctype = MEM_CGROUP_CHARGE_TYPE_SHMEM; - __mem_cgroup_commit_charge(memcg, newpage, 1, pc, ctype, false); + __mem_cgroup_commit_charge(memcg, newpage, 1, ctype, false); return ret; } @@ -3544,8 +3538,7 @@ void mem_cgroup_replace_page_cache(struc * the newpage may be on LRU(or pagevec for LRU) already. We lock * LRU while we overwrite pc->mem_cgroup. */ - pc = lookup_page_cgroup(newpage); - __mem_cgroup_commit_charge(memcg, newpage, 1, pc, type, true); + __mem_cgroup_commit_charge(memcg, newpage, 1, type, true); } #ifdef CONFIG_DEBUG_VM _ Patches currently in -mm which might be from hannes@xxxxxxxxxxx are origin.patch mm-fix-up-the-vmscan-stat-in-vmstat.patch mm-fix-null-ptr-dereference-in-migrate_pages.patch mm-fix-null-ptr-dereference-in-move_pages.patch linux-next.patch mm-remove-swap-token-code.patch hugetlb-rename-max_hstate-to-hugetlb_max_hstate.patch hugetlbfs-dont-use-err_ptr-with-vm_fault-values.patch hugetlbfs-add-an-inline-helper-for-finding-hstate-index.patch hugetlb-use-mmu_gather-instead-of-a-temporary-linked-list-for-accumulating-pages.patch hugetlb-use-mmu_gather-instead-of-a-temporary-linked-list-for-accumulating-pages-fix.patch hugetlb-use-mmu_gather-instead-of-a-temporary-linked-list-for-accumulating-pages-fix-fix.patch hugetlb-avoid-taking-i_mmap_mutex-in-unmap_single_vma-for-hugetlb.patch hugetlb-simplify-migrate_huge_page.patch memcg-add-hugetlb-extension.patch hugetlb-add-charge-uncharge-calls-for-hugetlb-alloc-free.patch memcg-track-resource-index-in-cftype-private.patch hugetlbfs-add-memcg-control-files-for-hugetlbfs.patch hugetlbfs-add-memcg-control-files-for-hugetlbfs-use-scnprintf-instead-of-sprintf.patch hugetlbfs-add-memcg-control-files-for-hugetlbfs-use-scnprintf-instead-of-sprintf-fix.patch hugetlbfs-add-a-list-for-tracking-in-use-hugetlb-pages.patch memcg-move-hugetlb-resource-count-to-parent-cgroup-on-memcg-removal.patch memcg-move-hugetlb-resource-count-to-parent-cgroup-on-memcg-removal-fix.patch memcg-move-hugetlb-resource-count-to-parent-cgroup-on-memcg-removal-fix-fix.patch hugetlb-migrate-memcg-info-from-oldpage-to-new-page-during-migration.patch memcg-add-memory-controller-documentation-for-hugetlb-management.patch memcg-fix-change-behavior-of-shared-anon-at-moving-task.patch memcg-swap-mem_cgroup_move_swap_account-never-needs-fixup.patch memcg-swap-use-mem_cgroup_uncharge_swap.patch mm-memcg-scanning_global_lru-means-mem_cgroup_disabled.patch mm-memcg-move-reclaim_stat-into-lruvec.patch mm-push-lru-index-into-shrink_active_list.patch mm-push-lru-index-into-shrink_active_list-fix.patch mm-mark-mm-inline-functions-as-__always_inline.patch mm-remove-lru-type-checks-from-__isolate_lru_page.patch mm-memcg-kill-mem_cgroup_lru_del.patch memcg-revise-the-position-of-threshold-index-while-unregistering-event.patch mm-memcg-use-vm_swappiness-from-target-memory-cgroup.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html