[PATCH 1/3] drm/amdgpu: Warn when bad pages approaches 90% threshold

[Luben Tuikov]

On 2021-10-21 13:26, Kent Russell wrote:
> dmesg doesn't warn when the number of bad pages approaches the
> threshold for page retirement. WARN when the number of bad pages
> is at 90% or greater for easier checks and planning, instead of waiting
> until the GPU is full of bad pages.
>
> Cc: Luben Tuikov <luben.tuikov at amd.com>
> Cc: Mukul Joshi <Mukul.Joshi at amd.com>
> Signed-off-by: Kent Russell <kent.russell at amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c
> index f4c05ff4b26c..8309eea09df3 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c
> @@ -1077,6 +1077,13 @@ int amdgpu_ras_eeprom_init(struct amdgpu_ras_eeprom_control *control,
>  		if (res)
>  			DRM_ERROR("RAS table incorrect checksum or error:%d\n",
>  				  res);
> +
> +		/* Warn if we are at 90% of the threshold or above
> +		 */
> +		if (10 * control->ras_num_recs >= ras->bad_page_cnt_threshold * 9)

Change this to " >= 9 * ras->bad_page_cnt_threshold ". With that fixed, this patch is:

Reviewed-by: Luben Tuikov <luben.tuikov at amd.com>

Regards,
Luben

> +			dev_warn(adev->dev, "RAS records:%u exceeds 90%% of threshold:%d",
> +					control->ras_num_recs,
> +					ras->bad_page_cnt_threshold);
>  	} else if (hdr->header == RAS_TABLE_HDR_BAD &&
>  		   amdgpu_bad_page_threshold != 0) {
>  		res = __verify_ras_table_checksum(control);