67 lines
2.2 KiB
Diff
67 lines
2.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Waiman Long <longman@redhat.com>
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Date: Thu, 17 Aug 2017 15:33:09 -0400
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Subject: [PATCH] cgroup: Add mount flag to enable cpuset to use v2 behavior in
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v1 cgroup
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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A new mount option "cpuset_v2_mode" is added to the v1 cgroupfs
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filesystem to enable cpuset controller to use v2 behavior in a v1
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cgroup. This mount option applies only to cpuset controller and have
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no effect on other controllers.
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Signed-off-by: Waiman Long <longman@redhat.com>
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Signed-off-by: Tejun Heo <tj@kernel.org>
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(cherry-picked from e1cba4b85daa71b710384d451ff6238d5e4d1ff6)
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Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
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---
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include/linux/cgroup-defs.h | 5 +++++
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kernel/cgroup/cgroup-v1.c | 6 ++++++
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2 files changed, 11 insertions(+)
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diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h
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index 09f4c7df1478..c344e77707a5 100644
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--- a/include/linux/cgroup-defs.h
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+++ b/include/linux/cgroup-defs.h
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@@ -74,6 +74,11 @@ enum {
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* aren't writeable from inside the namespace.
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*/
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CGRP_ROOT_NS_DELEGATE = (1 << 3),
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+
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+ /*
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+ * Enable cpuset controller in v1 cgroup to use v2 behavior.
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+ */
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+ CGRP_ROOT_CPUSET_V2_MODE = (1 << 4),
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};
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/* cftype->flags */
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diff --git a/kernel/cgroup/cgroup-v1.c b/kernel/cgroup/cgroup-v1.c
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index 7bf4b1533f34..ce7426b875f5 100644
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--- a/kernel/cgroup/cgroup-v1.c
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+++ b/kernel/cgroup/cgroup-v1.c
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@@ -846,6 +846,8 @@ static int cgroup1_show_options(struct seq_file *seq, struct kernfs_root *kf_roo
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seq_puts(seq, ",noprefix");
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if (root->flags & CGRP_ROOT_XATTR)
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seq_puts(seq, ",xattr");
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+ if (root->flags & CGRP_ROOT_CPUSET_V2_MODE)
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+ seq_puts(seq, ",cpuset_v2_mode");
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spin_lock(&release_agent_path_lock);
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if (strlen(root->release_agent_path))
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@@ -900,6 +902,10 @@ static int parse_cgroupfs_options(char *data, struct cgroup_sb_opts *opts)
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opts->cpuset_clone_children = true;
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continue;
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}
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+ if (!strcmp(token, "cpuset_v2_mode")) {
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+ opts->flags |= CGRP_ROOT_CPUSET_V2_MODE;
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+ continue;
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+ }
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if (!strcmp(token, "xattr")) {
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opts->flags |= CGRP_ROOT_XATTR;
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continue;
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--
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2.14.2
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