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drm/msm: show task cmdline in gpu recovery messages 

Now that freedreno gallium driver defaults to using submit_queue task
(render reordering), just showing task->comm is not so useful (ie. it is
always "flush_queue:0"), so also dump the cmdline.  This should also be
more useful for piglit/shader_runner.

Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Rob Clark 2017-09-13 10:17:18 -04:00
parent 78b8e5b847
commit 18bb8a6c89
1 changed files with 42 additions and 11 deletions
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43
drivers/gpu/drm/msm/msm_gpu.c
View File

@ -20,6 +20,8 @@
#include "msm_mmu.h"
#include "msm_fence.h"
#include <linux/string_helpers.h>
/*
* Power Management:
@ -235,6 +237,20 @@ static void update_fences(struct msm_gpu *gpu, struct msm_ringbuffer *ring,
}
}
static struct msm_gem_submit *
find_submit(struct msm_ringbuffer *ring, uint32_t fence)
{
struct msm_gem_submit *submit;
WARN_ON(!mutex_is_locked(&ring->gpu->dev->struct_mutex));
list_for_each_entry(submit, &ring->submits, node)
if (submit->seqno == fence)
return submit;
return NULL;
}
static void retire_submits(struct msm_gpu *gpu);
static void recover_worker(struct work_struct *work)
@ -268,19 +284,34 @@ static void recover_worker(struct work_struct *work)
dev_err(dev->dev, "%s: hangcheck recover!\n", gpu->name);
fence = cur_ring->memptrs->fence + 1;
list_for_each_entry(submit, &cur_ring->submits, node) {
if (submit->seqno == fence) {
submit = find_submit(cur_ring, fence);
if (submit) {
struct task_struct *task;
rcu_read_lock();
task = pid_task(submit->pid, PIDTYPE_PID);
if (task) {
dev_err(dev->dev, "%s: offending task: %s\n",
gpu->name, task->comm);
char *cmd;
/*
* So slightly annoying, in other paths like
* mmap'ing gem buffers, mmap_sem is acquired
* before struct_mutex, which means we can't
* hold struct_mutex across the call to
* get_cmdline(). But submits are retired
* from the same in-order workqueue, so we can
* safely drop the lock here without worrying
* about the submit going away.
*/
mutex_unlock(&dev->struct_mutex);
cmd = kstrdup_quotable_cmdline(task, GFP_KERNEL);
mutex_lock(&dev->struct_mutex);
dev_err(dev->dev, "%s: offending task: %s (%s)\n",
gpu->name, task->comm, cmd);
}
rcu_read_unlock();
break;
}
}
if (msm_gpu_active(gpu)) {