The patch titled
Subject: memcg: don't uncharge in mem_cgroup_move_account()
has been added to the -mm tree. Its filename is
memcg-dont-uncharge-in-mem_cgroup_move_account.patch
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From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Subject: memcg: don't uncharge in mem_cgroup_move_account()
Now, all callers pass 'false' for 'bool uncharge' so remove this argument.
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Ying Han <yinghan@xxxxxxxxxx>
Cc: Glauber Costa <glommer@xxxxxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memcontrol.c | 20 ++++++--------------
1 file changed, 6 insertions(+), 14 deletions(-)
diff -puN mm/memcontrol.c~memcg-dont-uncharge-in-mem_cgroup_move_account mm/memcontrol.c
--- a/mm/memcontrol.c~memcg-dont-uncharge-in-mem_cgroup_move_account
+++ a/mm/memcontrol.c
@@ -2615,23 +2615,19 @@ void mem_cgroup_split_huge_fixup(struct
* @pc: page_cgroup of the page.
* @from: mem_cgroup which the page is moved from.
* @to: mem_cgroup which the page is moved to. @from != @to.
- * @uncharge: whether we should call uncharge and css_put against @from.
*
* The caller must confirm following.
* - page is not on LRU (isolate_page() is useful.)
* - compound_lock is held when nr_pages > 1
*
- * This function doesn't do "charge" nor css_get to new cgroup. It should be
- * done by a caller(__mem_cgroup_try_charge would be useful). If @uncharge is
- * true, this function does "uncharge" from old cgroup, but it doesn't if
- * @uncharge is false, so a caller should do "uncharge".
+ * This function doesn't do "charge" to new cgroup and doesn't do "uncharge"
+ * from old cgroup.
*/
static int mem_cgroup_move_account(struct page *page,
unsigned int nr_pages,
struct page_cgroup *pc,
struct mem_cgroup *from,
- struct mem_cgroup *to,
- bool uncharge)
+ struct mem_cgroup *to)
{
unsigned long flags;
int ret;
@@ -2673,9 +2669,6 @@ static int mem_cgroup_move_account(struc
preempt_enable();
}
mem_cgroup_charge_statistics(from, anon, -nr_pages);
- if (uncharge)
- /* This is not "cancel", but cancel_charge does all we need. */
- __mem_cgroup_cancel_charge(from, nr_pages);
/* caller should have done css_get */
pc->mem_cgroup = to;
@@ -2737,7 +2730,7 @@ static int mem_cgroup_move_parent(struct
flags = compound_lock_irqsave(page);
ret = mem_cgroup_move_account(page, nr_pages,
- pc, child, parent, false);
+ pc, child, parent);
if (!ret)
__mem_cgroup_cancel_local_charge(child, nr_pages);
@@ -5755,8 +5748,7 @@ static int mem_cgroup_move_charge_pte_ra
if (!isolate_lru_page(page)) {
pc = lookup_page_cgroup(page);
if (!mem_cgroup_move_account(page, HPAGE_PMD_NR,
- pc, mc.from, mc.to,
- false)) {
+ pc, mc.from, mc.to)) {
mc.precharge -= HPAGE_PMD_NR;
mc.moved_charge += HPAGE_PMD_NR;
}
@@ -5786,7 +5778,7 @@ retry:
goto put;
pc = lookup_page_cgroup(page);
if (!mem_cgroup_move_account(page, 1, pc,
- mc.from, mc.to, false)) {
+ mc.from, mc.to)) {
mc.precharge--;
/* we uncharge from mc.from later. */
mc.moved_charge++;
_
Subject: Subject: memcg: don't uncharge in mem_cgroup_move_account()
Patches currently in -mm which might be from kamezawa.hiroyu@xxxxxxxxxxxxxx are
origin.patch
linux-next.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
memcg-add-hugetlb-extension-fix.patch
memcg-add-hugetlb-extension-fix-fix.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
mm-mmapc-find_vma-remove-unnecessary-ifmm-check.patch
mm-mmapc-find_vma-remove-unnecessary-ifmm-check-fix.patch
mm-correctly-synchronize-rss-counters-at-exit-exec.patch
thp-memcg-split-hugepage-for-memcg-oom-on-cow.patch
mm-do_migrate_pages-calls-migrate_to_node-even-if-task-is-already-on-a-correct-node.patch
mm-do_migrate_pages-calls-migrate_to_node-even-if-task-is-already-on-a-correct-node-fix.patch
mm-do_migrate_pages-rename-arguments.patch
kernel-cgroup-push-rcu-read-locking-from-css_is_ancestor-to-callsite.patch
mm-memcg-count-pte-references-from-every-member-of-the-reclaimed-hierarchy.patch
mm-thp-drop-page_table_lock-to-uncharge-memcg-pages.patch
documentation-memcg-future-proof-hierarchical-statistics-documentation.patch
mm-page_allocc-remove-pageblock_default_order.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-mark-more-functions-variables-as-static.patch
memcg-remove-unused-variable.patch
memcg-mark-stat-field-of-mem_cgroup-struct-as-__percpu.patch
memcg-remove-redundant-parentheses.patch
memcg-make-threshold-index-in-the-right-position.patch
memcg-revise-the-position-of-threshold-index-while-unregistering-event.patch
memcg-add-mlock-statistic-in-memorystat.patch
memcg-add-mlock-statistic-in-memorystat-fix.patch
mm-vmscan-store-priority-in-struct-scan_control.patch
mm-add-link-from-struct-lruvec-to-struct-zone.patch
mm-vmscan-push-lruvec-pointer-into-isolate_lru_pages.patch
mm-vmscan-push-zone-pointer-into-shrink_page_list.patch
mm-vmscan-remove-update_isolated_counts.patch
mm-vmscan-push-lruvec-pointer-into-putback_inactive_pages.patch
mm-vmscan-replace-zone_nr_lru_pages-with-get_lruvec_size.patch
mm-vmscan-push-lruvec-pointer-into-inactive_list_is_low.patch
mm-vmscan-push-lruvec-pointer-into-shrink_list.patch
mm-vmscan-push-lruvec-pointer-into-get_scan_count.patch
mm-vmscan-push-lruvec-pointer-into-should_continue_reclaim.patch
mm-vmscan-kill-struct-mem_cgroup_zone.patch
memcg-fix-error-code-in-hugetlb_force_memcg_empty.patch
rescounters-add-res_counter_uncharge_until.patch
memcg-use-res_counter_uncharge_until-in-move_parent.patch
memcg-move-charges-to-root-cgroup-if-use_hierarchy=0.patch
memcg-dont-uncharge-in-mem_cgroup_move_account.patch
remove-__must_check-for-res_counter_charge_nofail.patch
fork-call-complete_vfork_done-after-clearing-child_tid-and-flushing-rss-counters.patch
fs-proc-introduce-proc-pid-task-tid-children-entry-v9.patch
fs-proc-introduce-proc-pid-task-tid-children-entry-v9-fix.patch
c-r-procfs-add-arg_start-end-env_start-end-and-exit_code-members-to-proc-pid-stat.patch
c-r-prctl-extend-pr_set_mm-to-set-up-more-mm_struct-entries-v2.patch
c-r-prctl-simplify-pr_set_mm-on-mm-code-data-assignment.patch
c-r-prctl-simplify-pr_set_mm-on-mm-code-data-assignment-fix.patch
c-r-prctl-return-efault-instead-of-einval-in-case-if-underlied-vma-is-not-found.patch
c-r-prctl-drop-vma-flags-test-on-pr_set_mm_-stack-data-assignment.patch
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