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Message-Id: <20230112165609.1083270-9-tvrtko.ursulin@linux.intel.com>
Date: Thu, 12 Jan 2023 16:56:05 +0000
From: Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>
To: Intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org
Cc: cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
Tejun Heo <tj@...nel.org>,
Johannes Weiner <hannes@...xchg.org>,
Zefan Li <lizefan.x@...edance.com>,
Dave Airlie <airlied@...hat.com>,
Daniel Vetter <daniel.vetter@...ll.ch>,
Rob Clark <robdclark@...omium.org>,
Stéphane Marchesin <marcheu@...omium.org>,
"T . J . Mercier" <tjmercier@...gle.com>, Kenny.Ho@....com,
Christian König <christian.koenig@....com>,
Brian Welty <brian.welty@...el.com>,
Tvrtko Ursulin <tvrtko.ursulin@...el.com>
Subject: [RFC 08/12] drm/cgroup: Only track clients which are providing drm_cgroup_ops
From: Tvrtko Ursulin <tvrtko.ursulin@...el.com>
To reduce the number of tracking going on, especially with drivers which
will not support any sort of control from the drm cgroup controller side,
lets express the funcionality as opt-in and use the presence of
drm_cgroup_ops as activation criteria.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@...el.com>
---
drivers/gpu/drm/drm_cgroup.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/gpu/drm/drm_cgroup.c b/drivers/gpu/drm/drm_cgroup.c
index ef951421bba6..09249f795af3 100644
--- a/drivers/gpu/drm/drm_cgroup.c
+++ b/drivers/gpu/drm/drm_cgroup.c
@@ -36,6 +36,9 @@ void drm_clients_close(struct drm_file *file_priv)
lockdep_assert_held(&dev->filelist_mutex);
+ if (!dev->driver->cg_ops)
+ return;
+
pid = rcu_access_pointer(file_priv->pid);
clients = xa_load(&drm_pid_clients, (unsigned long)pid);
if (drm_WARN_ON_ONCE(dev, !clients))
@@ -67,6 +70,9 @@ int drm_clients_open(struct drm_file *file_priv)
lockdep_assert_held(&dev->filelist_mutex);
+ if (!dev->driver->cg_ops)
+ return 0;
+
pid = (unsigned long)rcu_access_pointer(file_priv->pid);
clients = xa_load(&drm_pid_clients, pid);
if (!clients) {
@@ -102,6 +108,9 @@ drm_clients_migrate(struct drm_file *file_priv,
lockdep_assert_held(&dev->filelist_mutex);
+ if (!dev->driver->cg_ops)
+ return;
+
existing_clients = xa_load(&drm_pid_clients, (unsigned long)new);
clients = xa_load(&drm_pid_clients, (unsigned long)old);
--
2.34.1
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