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From: Johannes Weiner <hannes@cmpxchg.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.cz>,
	Vladimir Davydov <vdavydov@virtuozzo.com>,
	linux-mm@kvack.org, cgroups@vger.kernel.org,
	linux-kernel@vger.kernel.org, kernel-team@fb.com
Subject: [PATCH] mm: memcontrol: let v2 cgroups follow changes in system swappiness
Date: Fri,  8 Apr 2016 18:49:04 -0400	[thread overview]
Message-ID: <1460155744-15942-1-git-send-email-hannes@cmpxchg.org> (raw)

Cgroup2 currently doesn't have a per-cgroup swappiness setting. We
might want to add one later - that's a different discussion - but
until we do, the cgroups should always follow the system setting.
Otherwise it will be unchangeably set to whatever the ancestor
inherited from the system setting at the time of cgroup creation.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: stable@vger.kernel.org # 4.5
---
 include/linux/swap.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/linux/swap.h b/include/linux/swap.h
index e58dba3..15d17c8 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -534,6 +534,10 @@ static inline swp_entry_t get_swap_page(void)
 #ifdef CONFIG_MEMCG
 static inline int mem_cgroup_swappiness(struct mem_cgroup *memcg)
 {
+	/* Cgroup2 doesn't have per-cgroup swappiness */
+	if (cgroup_subsys_on_dfl(memory_cgrp_subsys))
+		return vm_swappiness;
+
 	/* root ? */
 	if (mem_cgroup_disabled() || !memcg->css.parent)
 		return vm_swappiness;
-- 
2.8.0

WARNING: multiple messages have this Message-ID (diff)
From: Johannes Weiner <hannes@cmpxchg.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.cz>,
	Vladimir Davydov <vdavydov@virtuozzo.com>,
	linux-mm@kvack.org, cgroups@vger.kernel.org,
	linux-kernel@vger.kernel.org, kernel-team@fb.com
Subject: [PATCH] mm: memcontrol: let v2 cgroups follow changes in system swappiness
Date: Fri,  8 Apr 2016 18:49:04 -0400	[thread overview]
Message-ID: <1460155744-15942-1-git-send-email-hannes@cmpxchg.org> (raw)

Cgroup2 currently doesn't have a per-cgroup swappiness setting. We
might want to add one later - that's a different discussion - but
until we do, the cgroups should always follow the system setting.
Otherwise it will be unchangeably set to whatever the ancestor
inherited from the system setting at the time of cgroup creation.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: stable@vger.kernel.org # 4.5
---
 include/linux/swap.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/linux/swap.h b/include/linux/swap.h
index e58dba3..15d17c8 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -534,6 +534,10 @@ static inline swp_entry_t get_swap_page(void)
 #ifdef CONFIG_MEMCG
 static inline int mem_cgroup_swappiness(struct mem_cgroup *memcg)
 {
+	/* Cgroup2 doesn't have per-cgroup swappiness */
+	if (cgroup_subsys_on_dfl(memory_cgrp_subsys))
+		return vm_swappiness;
+
 	/* root ? */
 	if (mem_cgroup_disabled() || !memcg->css.parent)
 		return vm_swappiness;
-- 
2.8.0

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WARNING: multiple messages have this Message-ID (diff)
From: Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
To: Andrew Morton <akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
Cc: Michal Hocko <mhocko-AlSwsSmVLrQ@public.gmane.org>,
	Vladimir Davydov
	<vdavydov-5HdwGun5lf+gSpxsJD1C4w@public.gmane.org>,
	linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org,
	cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	kernel-team-b10kYP2dOMg@public.gmane.org
Subject: [PATCH] mm: memcontrol: let v2 cgroups follow changes in system swappiness
Date: Fri,  8 Apr 2016 18:49:04 -0400	[thread overview]
Message-ID: <1460155744-15942-1-git-send-email-hannes@cmpxchg.org> (raw)

Cgroup2 currently doesn't have a per-cgroup swappiness setting. We
might want to add one later - that's a different discussion - but
until we do, the cgroups should always follow the system setting.
Otherwise it will be unchangeably set to whatever the ancestor
inherited from the system setting at the time of cgroup creation.

Signed-off-by: Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
Cc: stable-u79uwXL29TY76Z2rM5mHXA@public.gmane.org # 4.5
---
 include/linux/swap.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/linux/swap.h b/include/linux/swap.h
index e58dba3..15d17c8 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -534,6 +534,10 @@ static inline swp_entry_t get_swap_page(void)
 #ifdef CONFIG_MEMCG
 static inline int mem_cgroup_swappiness(struct mem_cgroup *memcg)
 {
+	/* Cgroup2 doesn't have per-cgroup swappiness */
+	if (cgroup_subsys_on_dfl(memory_cgrp_subsys))
+		return vm_swappiness;
+
 	/* root ? */
 	if (mem_cgroup_disabled() || !memcg->css.parent)
 		return vm_swappiness;
-- 
2.8.0

             reply	other threads:[~2016-04-08 22:49 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-04-08 22:49 Johannes Weiner [this message]
2016-04-08 22:49 ` [PATCH] mm: memcontrol: let v2 cgroups follow changes in system swappiness Johannes Weiner
2016-04-08 22:49 ` Johannes Weiner
2016-04-09  8:58 ` Vladimir Davydov
2016-04-09  8:58   ` Vladimir Davydov
2016-04-11  7:31 ` Michal Hocko
2016-04-11  7:31   ` Michal Hocko

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