[Intel-gfx] [PATCH] drm/i915/guc: Reduce verbosity on log overflows

[Tvrtko Ursulin]

On 17/06/2019 11:09, Chris Wilson wrote:
> If the user is clearing the log buffer too slowly, we overflow. As this
> is an expected condition, and the driver tries to handle it, reduce the
> error message down to a notice.
> 
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=110817
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Michal Wajdeczko <michal.wajdeczko at intel.com>
> Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> ---
>   drivers/gpu/drm/i915/intel_guc_log.c | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_guc_log.c b/drivers/gpu/drm/i915/intel_guc_log.c
> index bf1446629703..e3b83ecb90b5 100644
> --- a/drivers/gpu/drm/i915/intel_guc_log.c
> +++ b/drivers/gpu/drm/i915/intel_guc_log.c
> @@ -208,7 +208,9 @@ static bool guc_check_log_buf_overflow(struct intel_guc_log *log,
>   			/* buffer_full_cnt is a 4 bit counter */
>   			log->stats[type].sampled_overflow += 16;
>   		}
> -		DRM_ERROR_RATELIMITED("GuC log buffer overflow\n");
> +
> +		dev_notice_ratelimited(guc_to_i915(log_to_guc(log))->drm.dev,
> +				       "GuC log buffer overflow\n");
>   	}
>   
>   	return overflow;
> 

Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>

Maybe we could even go debug, although I not sure if userspace is 
expected to look at dmesg to detect overflows or if the thing has some 
marker it writes into the file in that case. I don't see it so that's 
probably a slight flaw.

Regards,

Tvrtko