The patch titled
Subject: mm/memcg: move cgroup high memory limit setting into struct page_counter
has been added to the -mm tree. Its filename is
mm-move-cgroup-high-memory-limit-setting-into-struct-page_counter.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-move-cgroup-high-memory-limit-setting-into-struct-page_counter.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-move-cgroup-high-memory-limit-setting-into-struct-page_counter.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Jakub Kicinski <kuba@xxxxxxxxxx>
Subject: mm/memcg: move cgroup high memory limit setting into struct page_counter
High memory limit is currently recorded directly in struct mem_cgroup. We
are about to add a high limit for swap, move the field to struct
page_counter and add some helpers.
Link: http://lkml.kernel.org/r/20200527195846.102707-4-kuba@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Reviewed-by: Shakeel Butt <shakeelb@xxxxxxxxxx>
Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Chris Down <chris@xxxxxxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/memcontrol.h | 3 ---
include/linux/page_counter.h | 8 ++++++++
mm/memcontrol.c | 19 +++++++++++--------
3 files changed, 19 insertions(+), 11 deletions(-)
--- a/include/linux/memcontrol.h~mm-move-cgroup-high-memory-limit-setting-into-struct-page_counter
+++ a/include/linux/memcontrol.h
@@ -215,9 +215,6 @@ struct mem_cgroup {
struct page_counter kmem;
struct page_counter tcpmem;
- /* Upper bound of normal memory consumption range */
- unsigned long high;
-
/* Range enforcement for interrupt charges */
struct work_struct high_work;
--- a/include/linux/page_counter.h~mm-move-cgroup-high-memory-limit-setting-into-struct-page_counter
+++ a/include/linux/page_counter.h
@@ -10,6 +10,7 @@ struct page_counter {
atomic_long_t usage;
unsigned long min;
unsigned long low;
+ unsigned long high;
unsigned long max;
struct page_counter *parent;
@@ -55,6 +56,13 @@ bool page_counter_try_charge(struct page
void page_counter_uncharge(struct page_counter *counter, unsigned long nr_pages);
void page_counter_set_min(struct page_counter *counter, unsigned long nr_pages);
void page_counter_set_low(struct page_counter *counter, unsigned long nr_pages);
+
+static inline void page_counter_set_high(struct page_counter *counter,
+ unsigned long nr_pages)
+{
+ WRITE_ONCE(counter->high, nr_pages);
+}
+
int page_counter_set_max(struct page_counter *counter, unsigned long nr_pages);
int page_counter_memparse(const char *buf, const char *max,
unsigned long *nr_pages);
--- a/mm/memcontrol.c~mm-move-cgroup-high-memory-limit-setting-into-struct-page_counter
+++ a/mm/memcontrol.c
@@ -2252,7 +2252,8 @@ static void reclaim_high(struct mem_cgro
gfp_t gfp_mask)
{
do {
- if (page_counter_read(&memcg->memory) <= READ_ONCE(memcg->high))
+ if (page_counter_read(&memcg->memory) <=
+ READ_ONCE(memcg->memory.high))
continue;
memcg_memory_event(memcg, MEMCG_HIGH);
try_to_free_mem_cgroup_pages(memcg, nr_pages, gfp_mask, true);
@@ -2345,7 +2346,7 @@ static u64 mem_find_max_overage(struct m
do {
overage = calculate_overage(page_counter_read(&memcg->memory),
- READ_ONCE(memcg->high));
+ READ_ONCE(memcg->memory.high));
max_overage = max(overage, max_overage);
} while ((memcg = parent_mem_cgroup(memcg)) &&
!mem_cgroup_is_root(memcg));
@@ -2604,7 +2605,8 @@ done_restock:
* reclaim, the cost of mismatch is negligible.
*/
do {
- if (page_counter_read(&memcg->memory) > READ_ONCE(memcg->high)) {
+ if (page_counter_read(&memcg->memory) >
+ READ_ONCE(memcg->memory.high)) {
/* Don't bother a random interrupted task */
if (in_interrupt()) {
schedule_work(&memcg->high_work);
@@ -4349,7 +4351,7 @@ void mem_cgroup_wb_stats(struct bdi_writ
while ((parent = parent_mem_cgroup(memcg))) {
unsigned long ceiling = min(READ_ONCE(memcg->memory.max),
- READ_ONCE(memcg->high));
+ READ_ONCE(memcg->memory.high));
unsigned long used = page_counter_read(&memcg->memory);
*pheadroom = min(*pheadroom, ceiling - min(ceiling, used));
@@ -5074,7 +5076,7 @@ mem_cgroup_css_alloc(struct cgroup_subsy
if (IS_ERR(memcg))
return ERR_CAST(memcg);
- WRITE_ONCE(memcg->high, PAGE_COUNTER_MAX);
+ page_counter_set_high(&memcg->memory, PAGE_COUNTER_MAX);
memcg->soft_limit = PAGE_COUNTER_MAX;
if (parent) {
memcg->swappiness = mem_cgroup_swappiness(parent);
@@ -5227,7 +5229,7 @@ static void mem_cgroup_css_reset(struct
page_counter_set_max(&memcg->tcpmem, PAGE_COUNTER_MAX);
page_counter_set_min(&memcg->memory, 0);
page_counter_set_low(&memcg->memory, 0);
- WRITE_ONCE(memcg->high, PAGE_COUNTER_MAX);
+ page_counter_set_high(&memcg->memory, PAGE_COUNTER_MAX);
memcg->soft_limit = PAGE_COUNTER_MAX;
memcg_wb_domain_size_changed(memcg);
}
@@ -6026,7 +6028,8 @@ static ssize_t memory_low_write(struct k
static int memory_high_show(struct seq_file *m, void *v)
{
- return seq_puts_memcg_tunable(m, READ_ONCE(mem_cgroup_from_seq(m)->high));
+ return seq_puts_memcg_tunable(m,
+ READ_ONCE(mem_cgroup_from_seq(m)->memory.high));
}
static ssize_t memory_high_write(struct kernfs_open_file *of,
@@ -6043,7 +6046,7 @@ static ssize_t memory_high_write(struct
if (err)
return err;
- WRITE_ONCE(memcg->high, high);
+ page_counter_set_high(&memcg->memory, high);
for (;;) {
unsigned long nr_pages = page_counter_read(&memcg->memory);
_
Patches currently in -mm which might be from kuba@xxxxxxxxxx are
mm-prepare-for-swap-over-high-accounting-and-penalty-calculation.patch
mm-move-penalty-delay-clamping-out-of-calculate_high_delay.patch
mm-move-cgroup-high-memory-limit-setting-into-struct-page_counter.patch
mm-automatically-penalize-tasks-with-high-swap-use.patch
