[AMD Official Use Only - General]
> -----Original Message-----
> From: Zhang, Hawking <hawking.zh...@amd.com>
> Sent: Friday, February 10, 2023 11:02 PM
> To: Zhou1, Tao <tao.zh...@amd.com>; amd-gfx@lists.freedesktop.org; Yang,
> Stanley <stanley.y...@amd.com>; Chai, Thomas <yipeng.c...@amd.com>; Li,
> Candice <candice...@amd.com>
> Subject: RE: [PATCH] drm/amdgpu: don't increase UMC RAS UE count if no new
> bad page
>
> [AMD Official Use Only - General]
>
> + /* if no new bad page is found, no need to increase
> ue count */
> + if (ret == -EEXIST)
> + err_data->ue_count = 0;
>
> Returning EEXIST in such case is not reasonable. Might consider return a bool
> for
> amdgpu_ras_add_bad_pages: true means it does add some new bad page; false
> means it doesn't change anything.
>
> Regards,
> Hawking
[Tao] but it can returns -ENOMEM, amdgpu_ras_load_bad_pages and
amdgpu_ras_recovery_init also need to check the return value. I'd like to keep
the type of return value unchanged.
How about -EINVAL?
>
> -----Original Message-----
> From: Zhou1, Tao <tao.zh...@amd.com>
> Sent: Friday, February 10, 2023 16:45
> To: amd-gfx@lists.freedesktop.org; Zhang, Hawking
> <hawking.zh...@amd.com>; Yang, Stanley <stanley.y...@amd.com>; Chai,
> Thomas <yipeng.c...@amd.com>; Li, Candice <candice...@amd.com>
> Cc: Zhou1, Tao <tao.zh...@amd.com>
> Subject: [PATCH] drm/amdgpu: don't increase UMC RAS UE count if no new bad
> page
>
> If a UMC bad page is reserved but not freed by an application, the application
> may trigger uncorrectable error repeatly by accessing the page.
>
> Signed-off-by: Tao Zhou <tao.zh...@amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 9 ++++++++-
> drivers/gpu/drm/amd/amdgpu/amdgpu_umc.c | 6 +++++-
> 2 files changed, 13 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> index e85c4689ce2c..eafe01a24349 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> @@ -2049,7 +2049,7 @@ int amdgpu_ras_add_bad_pages(struct
> amdgpu_device *adev, {
> struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
> struct ras_err_handler_data *data;
> - int ret = 0;
> + int ret = 0, old_cnt;
> uint32_t i;
>
> if (!con || !con->eh_data || !bps || pages <= 0) @@ -2060,6 +2060,8 @@
> int amdgpu_ras_add_bad_pages(struct amdgpu_device *adev,
> if (!data)
> goto out;
>
> + old_cnt = data->count;
> +
> for (i = 0; i < pages; i++) {
> if (amdgpu_ras_check_bad_page_unlock(con,
> bps[i].retired_page << AMDGPU_GPU_PAGE_SHIFT)) @@
> -2079,6
> +2081,11 @@ int amdgpu_ras_add_bad_pages(struct amdgpu_device *adev,
> data->count++;
> data->space_left--;
> }
> +
> + /* all pages have been reserved before, no new bad page */
> + if (old_cnt == data->count)
> + ret = -EEXIST;
> +
> out:
> mutex_unlock(&con->recovery_lock);
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_umc.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_umc.c
> index 1c7fcb4f2380..772c431e4065 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_umc.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_umc.c
> @@ -145,8 +145,12 @@ static int amdgpu_umc_do_page_retirement(struct
> amdgpu_device *adev,
>
> if ((amdgpu_bad_page_threshold != 0) &&
> err_data->err_addr_cnt) {
> - amdgpu_ras_add_bad_pages(adev, err_data->err_addr,
> + ret = amdgpu_ras_add_bad_pages(adev,
> err_data->err_addr,
> err_data->err_addr_cnt);
> + /* if no new bad page is found, no need to increase
> ue count */
> + if (ret == -EEXIST)
> + err_data->ue_count = 0;
> +
> amdgpu_ras_save_bad_pages(adev);
>
> amdgpu_dpm_send_hbm_bad_pages_num(adev, con-
> >eeprom_control.ras_num_recs);
> --
> 2.35.1
>
