drm/i915: Show guilty context name on GPU reset

We mention that we are resetting the GPU, and dump the device state for
post mortem debugging. However, while that dump contains the active
processes and the one flagged as causing the error, we do not always
include that information in dmesg. Include the name of the guilty
process in dmesg for reference.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191111114323.5833-4-chris@chris-wilson.co.uk

diff --git a/drivers/gpu/drm/i915/gt/intel_reset.c b/drivers/gpu/drm/i915/gt/intel_reset.c
index f03e000051c1537ddc353e4919194c6bff686d79..86d52383bf9d1415bd6e0b295cc43a3bc35878ef 100644 (file)
--- a/drivers/gpu/drm/i915/gt/intel_reset.c
+++ b/drivers/gpu/drm/i915/gt/intel_reset.c
@@ -87,6 +87,10 @@ static bool context_mark_guilty(struct i915_gem_context *ctx)
        if (!i915_gem_context_is_bannable(ctx))
                return false;
 
+       dev_notice(ctx->i915->drm.dev,
+                  "%s context reset due to GPU hang\n",
+                  ctx->name);
+
        /* Record the timestamp for the last N hangs */
        prev_hang = ctx->hang_timestamp[0];
        for (i = 0; i < ARRAY_SIZE(ctx->hang_timestamp) - 1; i++)