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drm: Track clients by tgid and not tid

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Thread group id (aka pid from userspace point of view) is a more
interesting thing to show as an owner of a DRM fd, so track and show that
instead of the thread id.

In the next patch we will make the owner updated post file descriptor
handover, which will also be tgid based to avoid ping-pong when multiple
threads access the fd.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Zack Rusin <zackr@vmware.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230314141904.1210824-2-tvrtko.ursulin@linux.intel.com
This commit is contained in:
Tvrtko Ursulin
2023-03-14 14:18:55 +00:00
committed by Christian König
parent e2945e6c51
commit 4230cea89c
4 changed files with 5 additions and 5 deletions
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4
drivers/gpu/drm/drm_debugfs.c
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@@ -80,7 +80,7 @@ static int drm_clients_info(struct seq_file *m, void *data)
seq_printf(m,
"%20s %5s %3s master a %5s %10s\n",
"command",
"pid",
"tgid",
"dev",
"uid",
"magic");
@@ -94,7 +94,7 @@ static int drm_clients_info(struct seq_file *m, void *data)
bool is_current_master = drm_is_current_master(priv);
rcu_read_lock(); /* locks pid_task()->comm */
task = pid_task(priv->pid, PIDTYPE_PID);
task = pid_task(priv->pid, PIDTYPE_TGID);
uid = task ? __task_cred(task)->euid : GLOBAL_ROOT_UID;
seq_printf(m, "%20s %5d %3d %c %c %5d %10u\n",
task ? task->comm : "<unknown>",