drm/i915: Show i915_gem_context owner in debugfs
Print the context's owner (via the pid under file_priv) under debugfs.
In doing so, we must be careful that the filp is not accessed after it
is freed (notified via i915_gem_context_close).
v2: Mark the file_priv as closed.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1464098023-3294-6-git-send-email-chris@chris-wilson.co.uk
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 424e11e..05b9e5e 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2014,9 +2014,23 @@
continue;
seq_printf(m, "HW context %u ", ctx->hw_id);
+ if (IS_ERR(ctx->file_priv)) {
+ seq_puts(m, "(deleted) ");
+ } else if (ctx->file_priv) {
+ struct pid *pid = ctx->file_priv->file->pid;
+ struct task_struct *task;
+
+ task = get_pid_task(pid, PIDTYPE_PID);
+ if (task) {
+ seq_printf(m, "(%s [%d]) ",
+ task->comm, task->pid);
+ put_task_struct(task);
+ }
+ } else {
+ seq_puts(m, "(kernel) ");
+ }
+
describe_ctx(m, ctx);
- if (ctx == dev_priv->kernel_context)
- seq_printf(m, "(kernel context) ");
if (i915.enable_execlists) {
seq_putc(m, '\n');