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add cpuset v2 in v1 cherry-picks

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Fabian Grünbichler 2017-09-15 11:53:10 +02:00
parent 2853601c5c
commit e03fa66fce
6 changed files with 211 additions and 4 deletions
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2
patches/kernel/0001-Make-mkcompile_h-accept-an-alternate-timestamp-strin.patch
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@ -1,7 +1,7 @@
From 3e7aff6b22287eb04b8b5c4966b886b0ac1e8b06 Mon Sep 17 00:00:00 2001
From: Ben Hutchings <ben@decadent.org.uk>
Date: Tue, 12 May 2015 19:29:22 +0100
Subject: [PATCH 1/4] Make mkcompile_h accept an alternate timestamp string
Subject: [PATCH 1/6] Make mkcompile_h accept an alternate timestamp string
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

2
patches/kernel/0002-bridge-keep-MAC-of-first-assigned-port.patch
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@ -1,7 +1,7 @@
From 400ed0a6a0992f685b547e12f0fd5d35176e1275 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fabian=20Gr=C3=BCnbichler?= <f.gruenbichler@proxmox.com>
Date: Thu, 14 Sep 2017 11:02:18 +0200
Subject: [PATCH 2/4] bridge: keep MAC of first assigned port
Subject: [PATCH 2/6] bridge: keep MAC of first assigned port
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

2
patches/kernel/0003-pci-Enable-overrides-for-missing-ACS-capabilities-4..patch
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@ -1,7 +1,7 @@
From e39d70502f7a981f821243160501303b7ee26d52 Mon Sep 17 00:00:00 2001
From: Mark Weiman <mark.weiman@markzz.com>
Date: Sat, 29 Jul 2017 09:15:32 -0400
Subject: [PATCH 3/4] pci: Enable overrides for missing ACS capabilities
Subject: [PATCH 3/6] pci: Enable overrides for missing ACS capabilities
(4.12+)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8

2
patches/kernel/0004-kvm-disable-default-dynamic-halt-polling-growth.patch
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@ -1,7 +1,7 @@
From c60cb6add5a95c3e7bfb7b0d92c01ce66bfec8d6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fabian=20Gr=C3=BCnbichler?= <f.gruenbichler@proxmox.com>
Date: Thu, 14 Sep 2017 11:09:58 +0200
Subject: [PATCH 4/4] kvm: disable default dynamic halt polling growth
Subject: [PATCH 4/6] kvm: disable default dynamic halt polling growth
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

66
patches/kernel/0005-cgroup-Add-mount-flag-to-enable-cpuset-to-use-v2-beh.patch Normal file
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@ -0,0 +1,66 @@
From 014fff8b14ccd85d8e9604bbf4e812784bcfc29b Mon Sep 17 00:00:00 2001
From: Waiman Long <longman@redhat.com>
Date: Thu, 17 Aug 2017 15:33:09 -0400
Subject: [PATCH 5/6] cgroup: Add mount flag to enable cpuset to use v2
behavior in v1 cgroup
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
A new mount option "cpuset_v2_mode" is added to the v1 cgroupfs
filesystem to enable cpuset controller to use v2 behavior in a v1
cgroup. This mount option applies only to cpuset controller and have
no effect on other controllers.
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
(cherry-picked from e1cba4b85daa71b710384d451ff6238d5e4d1ff6)
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
---
include/linux/cgroup-defs.h | 5 +++++
kernel/cgroup/cgroup-v1.c | 6 ++++++
2 files changed, 11 insertions(+)
diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h
index 09f4c7df1478..c344e77707a5 100644
--- a/include/linux/cgroup-defs.h
+++ b/include/linux/cgroup-defs.h
@@ -74,6 +74,11 @@ enum {
* aren't writeable from inside the namespace.
*/
CGRP_ROOT_NS_DELEGATE = (1 << 3),
+
+ /*
+ * Enable cpuset controller in v1 cgroup to use v2 behavior.
+ */
+ CGRP_ROOT_CPUSET_V2_MODE = (1 << 4),
};
/* cftype->flags */
diff --git a/kernel/cgroup/cgroup-v1.c b/kernel/cgroup/cgroup-v1.c
index 7bf4b1533f34..ce7426b875f5 100644
--- a/kernel/cgroup/cgroup-v1.c
+++ b/kernel/cgroup/cgroup-v1.c
@@ -846,6 +846,8 @@ static int cgroup1_show_options(struct seq_file *seq, struct kernfs_root *kf_roo
seq_puts(seq, ",noprefix");
if (root->flags & CGRP_ROOT_XATTR)
seq_puts(seq, ",xattr");
+ if (root->flags & CGRP_ROOT_CPUSET_V2_MODE)
+ seq_puts(seq, ",cpuset_v2_mode");
spin_lock(&release_agent_path_lock);
if (strlen(root->release_agent_path))
@@ -900,6 +902,10 @@ static int parse_cgroupfs_options(char *data, struct cgroup_sb_opts *opts)
opts->cpuset_clone_children = true;
continue;
}
+ if (!strcmp(token, "cpuset_v2_mode")) {
+ opts->flags |= CGRP_ROOT_CPUSET_V2_MODE;
+ continue;
+ }
if (!strcmp(token, "xattr")) {
opts->flags |= CGRP_ROOT_XATTR;
continue;
--
2.11.0

141
patches/kernel/0006-cpuset-Allow-v2-behavior-in-v1-cgroup.patch Normal file
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@ -0,0 +1,141 @@
From eef40f89ccf3fc7ef5b1f88a4a6974fa7667f74f Mon Sep 17 00:00:00 2001
From: Waiman Long <longman@redhat.com>
Date: Thu, 17 Aug 2017 15:33:10 -0400
Subject: [PATCH 6/6] cpuset: Allow v2 behavior in v1 cgroup
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Cpuset v2 has some useful behaviors that are not present in v1 because
of backward compatibility concern. One of that is the restoration of
the original cpu and memory node mask after a hot removal and addition
event sequence.
This patch makes the cpuset controller to check the
CGRP_ROOT_CPUSET_V2_MODE flag and use the v2 behavior if it is set.
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
(cherry-picked from b8d1b8ee93df8ffbabbeadd65d39853cfad6d698)
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
---
kernel/cgroup/cpuset.c | 33 ++++++++++++++++++++-------------
1 file changed, 20 insertions(+), 13 deletions(-)
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index 87a1213dd326..9b2c4babbd7f 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -300,6 +300,16 @@ static DECLARE_WORK(cpuset_hotplug_work, cpuset_hotplug_workfn);
static DECLARE_WAIT_QUEUE_HEAD(cpuset_attach_wq);
/*
+ * Cgroup v2 behavior is used when on default hierarchy or the
+ * cgroup_v2_mode flag is set.
+ */
+static inline bool is_in_v2_mode(void)
+{
+ return cgroup_subsys_on_dfl(cpuset_cgrp_subsys) ||
+ (cpuset_cgrp_subsys.root->flags & CGRP_ROOT_CPUSET_V2_MODE);
+}
+
+/*
* This is ugly, but preserves the userspace API for existing cpuset
* users. If someone tries to mount the "cpuset" filesystem, we
* silently switch it to mount "cgroup" instead
@@ -489,8 +499,7 @@ static int validate_change(struct cpuset *cur, struct cpuset *trial)
/* On legacy hiearchy, we must be a subset of our parent cpuset. */
ret = -EACCES;
- if (!cgroup_subsys_on_dfl(cpuset_cgrp_subsys) &&
- !is_cpuset_subset(trial, par))
+ if (!is_in_v2_mode() && !is_cpuset_subset(trial, par))
goto out;
/*
@@ -896,8 +905,7 @@ static void update_cpumasks_hier(struct cpuset *cs, struct cpumask *new_cpus)
* If it becomes empty, inherit the effective mask of the
* parent, which is guaranteed to have some CPUs.
*/
- if (cgroup_subsys_on_dfl(cpuset_cgrp_subsys) &&
- cpumask_empty(new_cpus))
+ if (is_in_v2_mode() && cpumask_empty(new_cpus))
cpumask_copy(new_cpus, parent->effective_cpus);
/* Skip the whole subtree if the cpumask remains the same. */
@@ -914,7 +922,7 @@ static void update_cpumasks_hier(struct cpuset *cs, struct cpumask *new_cpus)
cpumask_copy(cp->effective_cpus, new_cpus);
spin_unlock_irq(&callback_lock);
- WARN_ON(!cgroup_subsys_on_dfl(cpuset_cgrp_subsys) &&
+ WARN_ON(!is_in_v2_mode() &&
!cpumask_equal(cp->cpus_allowed, cp->effective_cpus));
update_tasks_cpumask(cp);
@@ -1150,8 +1158,7 @@ static void update_nodemasks_hier(struct cpuset *cs, nodemask_t *new_mems)
* If it becomes empty, inherit the effective mask of the
* parent, which is guaranteed to have some MEMs.
*/
- if (cgroup_subsys_on_dfl(cpuset_cgrp_subsys) &&
- nodes_empty(*new_mems))
+ if (is_in_v2_mode() && nodes_empty(*new_mems))
*new_mems = parent->effective_mems;
/* Skip the whole subtree if the nodemask remains the same. */
@@ -1168,7 +1175,7 @@ static void update_nodemasks_hier(struct cpuset *cs, nodemask_t *new_mems)
cp->effective_mems = *new_mems;
spin_unlock_irq(&callback_lock);
- WARN_ON(!cgroup_subsys_on_dfl(cpuset_cgrp_subsys) &&
+ WARN_ON(!is_in_v2_mode() &&
!nodes_equal(cp->mems_allowed, cp->effective_mems));
update_tasks_nodemask(cp);
@@ -1460,7 +1467,7 @@ static int cpuset_can_attach(struct cgroup_taskset *tset)
/* allow moving tasks into an empty cpuset if on default hierarchy */
ret = -ENOSPC;
- if (!cgroup_subsys_on_dfl(cpuset_cgrp_subsys) &&
+ if (!is_in_v2_mode() &&
(cpumask_empty(cs->cpus_allowed) || nodes_empty(cs->mems_allowed)))
goto out_unlock;
@@ -1979,7 +1986,7 @@ static int cpuset_css_online(struct cgroup_subsys_state *css)
cpuset_inc();
spin_lock_irq(&callback_lock);
- if (cgroup_subsys_on_dfl(cpuset_cgrp_subsys)) {
+ if (is_in_v2_mode()) {
cpumask_copy(cs->effective_cpus, parent->effective_cpus);
cs->effective_mems = parent->effective_mems;
}
@@ -2056,7 +2063,7 @@ static void cpuset_bind(struct cgroup_subsys_state *root_css)
mutex_lock(&cpuset_mutex);
spin_lock_irq(&callback_lock);
- if (cgroup_subsys_on_dfl(cpuset_cgrp_subsys)) {
+ if (is_in_v2_mode()) {
cpumask_copy(top_cpuset.cpus_allowed, cpu_possible_mask);
top_cpuset.mems_allowed = node_possible_map;
} else {
@@ -2250,7 +2257,7 @@ static void cpuset_hotplug_update_tasks(struct cpuset *cs)
cpus_updated = !cpumask_equal(&new_cpus, cs->effective_cpus);
mems_updated = !nodes_equal(new_mems, cs->effective_mems);
- if (cgroup_subsys_on_dfl(cpuset_cgrp_subsys))
+ if (is_in_v2_mode())
hotplug_update_tasks(cs, &new_cpus, &new_mems,
cpus_updated, mems_updated);
else
@@ -2281,7 +2288,7 @@ static void cpuset_hotplug_workfn(struct work_struct *work)
static cpumask_t new_cpus;
static nodemask_t new_mems;
bool cpus_updated, mems_updated;
- bool on_dfl = cgroup_subsys_on_dfl(cpuset_cgrp_subsys);
+ bool on_dfl = is_in_v2_mode();
mutex_lock(&cpuset_mutex);
--
2.11.0