linux-kernel - [RFC 5/9] apparmor: Switch intree labels to percpu mode

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Date: Wed, 10 Jan 2024 16:48:52 +0530
From: Neeraj Upadhyay <Neeraj.Upadhyay@....com>
To: <john.johansen@...onical.com>, <paul@...l-moore.com>, <jmorris@...ei.org>,
	<serge@...lyn.com>
CC: <linux-security-module@...r.kernel.org>, <apparmor@...ts.ubuntu.com>,
	<linux-kernel@...r.kernel.org>, <gautham.shenoy@....com>,
	<Santosh.Shukla@....com>, <Ananth.Narayan@....com>,
	<raghavendra.kodsarathimmappa@....com>, <paulmck@...nel.org>,
	<boqun.feng@...il.com>, <vinicius.gomes@...el.com>, <mjguzik@...il.com>,
	Neeraj Upadhyay <Neeraj.Upadhyay@....com>
Subject: [RFC 5/9] apparmor: Switch intree labels to percpu mode

Now that we have an infrastructure to reclaim
the percpu labels, switch intree labels to
percpu mode, to improve the ref scalability.

Signed-off-by: Neeraj Upadhyay <Neeraj.Upadhyay@....com>
---
 security/apparmor/label.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/security/apparmor/label.c b/security/apparmor/label.c
index aa9e6eac3ecc..1299262f54e1 100644
--- a/security/apparmor/label.c
+++ b/security/apparmor/label.c
@@ -710,6 +710,8 @@ static struct aa_label *__label_insert(struct aa_labelset *ls,
 	rb_link_node(&label->node, parent, new);
 	rb_insert_color(&label->node, &ls->root);
 	label->flags |= FLAG_IN_TREE;
+	percpu_ref_switch_to_percpu(&label->count);
+	aa_label_reclaim_add_label(label);
 
 	return aa_get_label(label);
 }
-- 
2.34.1