VRAM manager and DRM MM when init failed, there is no operaction
to free kzalloc memory & remove device file.
This will lead to memleak & cause stability issue.
Signed-off-by: Bernard Zhao <[email protected]>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 24 ++++++++++++++++----
1 file changed, 19 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
index 82a3299e53c0..4c5fb153e6b4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
@@ -175,30 +175,44 @@ static int amdgpu_vram_mgr_init(struct ttm_mem_type_manager *man,
ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_total);
if (ret) {
DRM_ERROR("Failed to create device file mem_info_vram_total\n");
- return ret;
+ goto VRAM_TOTAL_FAIL;
}
ret = device_create_file(adev->dev, &dev_attr_mem_info_vis_vram_total);
if (ret) {
DRM_ERROR("Failed to create device file mem_info_vis_vram_total\n");
- return ret;
+ goto VIS_VRAM_TOTA_FAIL;
}
ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_used);
if (ret) {
DRM_ERROR("Failed to create device file mem_info_vram_used\n");
- return ret;
+ goto VRAM_USED_FAIL;
}
ret = device_create_file(adev->dev, &dev_attr_mem_info_vis_vram_used);
if (ret) {
DRM_ERROR("Failed to create device file mem_info_vis_vram_used\n");
- return ret;
+ goto VIS_VRAM_USED_FAIL;
}
ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_vendor);
if (ret) {
DRM_ERROR("Failed to create device file mem_info_vram_vendor\n");
- return ret;
+ goto VRAM_VERDOR_FAIL;
}
return 0;
+
+VRAM_VERDOR_FAIL:
+ device_remove_file(adev->dev, &dev_attr_mem_info_vis_vram_used);
+VIS_VRAM_USED_FAIL:
+ device_remove_file(adev->dev, &dev_attr_mem_info_vram_used);
+RVAM_USED_FAIL:
+ device_remove_file(adev->dev, &dev_attr_mem_info_vis_vram_total);
+VIS_VRAM_TOTA_FAIL:
+ device_remove_file(adev->dev, &dev_attr_mem_info_vram_total);
+VRAM_TOTAL_FAIL:
+ kfree(mgr);
+ man->priv = NULL;
+
+ return ret;
}
/**
--
2.26.2
Am 21.04.20 um 13:17 schrieb Bernard Zhao:
> VRAM manager and DRM MM when init failed, there is no operaction
> to free kzalloc memory & remove device file.
> This will lead to memleak & cause stability issue.
NAK, failure to create sysfs nodes are not critical.
Christian.
>
> Signed-off-by: Bernard Zhao <[email protected]>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 24 ++++++++++++++++----
> 1 file changed, 19 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
> index 82a3299e53c0..4c5fb153e6b4 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
> @@ -175,30 +175,44 @@ static int amdgpu_vram_mgr_init(struct ttm_mem_type_manager *man,
> ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_total);
> if (ret) {
> DRM_ERROR("Failed to create device file mem_info_vram_total\n");
> - return ret;
> + goto VRAM_TOTAL_FAIL;
> }
> ret = device_create_file(adev->dev, &dev_attr_mem_info_vis_vram_total);
> if (ret) {
> DRM_ERROR("Failed to create device file mem_info_vis_vram_total\n");
> - return ret;
> + goto VIS_VRAM_TOTA_FAIL;
> }
> ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_used);
> if (ret) {
> DRM_ERROR("Failed to create device file mem_info_vram_used\n");
> - return ret;
> + goto VRAM_USED_FAIL;
> }
> ret = device_create_file(adev->dev, &dev_attr_mem_info_vis_vram_used);
> if (ret) {
> DRM_ERROR("Failed to create device file mem_info_vis_vram_used\n");
> - return ret;
> + goto VIS_VRAM_USED_FAIL;
> }
> ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_vendor);
> if (ret) {
> DRM_ERROR("Failed to create device file mem_info_vram_vendor\n");
> - return ret;
> + goto VRAM_VERDOR_FAIL;
> }
>
> return 0;
> +
> +VRAM_VERDOR_FAIL:
> + device_remove_file(adev->dev, &dev_attr_mem_info_vis_vram_used);
> +VIS_VRAM_USED_FAIL:
> + device_remove_file(adev->dev, &dev_attr_mem_info_vram_used);
> +RVAM_USED_FAIL:
> + device_remove_file(adev->dev, &dev_attr_mem_info_vis_vram_total);
> +VIS_VRAM_TOTA_FAIL:
> + device_remove_file(adev->dev, &dev_attr_mem_info_vram_total);
> +VRAM_TOTAL_FAIL:
> + kfree(mgr);
> + man->priv = NULL;
> +
> + return ret;
> }
>
> /**
From: "Christian König" <[email protected]>
Date: 2020-04-21 19:22:49
To: Bernard Zhao <[email protected]>,Alex Deucher <[email protected]>,"David (ChunMing) Zhou" <[email protected]>,David Airlie <[email protected]>,Daniel Vetter <[email protected]>,Tom St Denis <[email protected]>,Ori Messinger <[email protected]>,Sam Ravnborg <[email protected]>,[email protected],[email protected],[email protected]
Cc: [email protected]
Subject: Re: [PATCH] amdgpu: fixes memleak issue when init failed>Am 21.04.20 um 13:17 schrieb Bernard Zhao:
>> VRAM manager and DRM MM when init failed, there is no operaction
>> to free kzalloc memory & remove device file.
>> This will lead to memleak & cause stability issue.
>
>NAK, failure to create sysfs nodes are not critical.
>
>Christian.
>
OK, get it.
By the way, should i modify this patch to just handle <kfree(mgr)> in error branch, or that it is also unnecessary?
Regards,
Bernard
>>
>> Signed-off-by: Bernard Zhao <[email protected]>
>> ---
>> drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 24 ++++++++++++++++----
>> 1 file changed, 19 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>> index 82a3299e53c0..4c5fb153e6b4 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>> @@ -175,30 +175,44 @@ static int amdgpu_vram_mgr_init(struct ttm_mem_type_manager *man,
>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_total);
>> if (ret) {
>> DRM_ERROR("Failed to create device file mem_info_vram_total\n");
>> - return ret;
>> + goto VRAM_TOTAL_FAIL;
>> }
>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vis_vram_total);
>> if (ret) {
>> DRM_ERROR("Failed to create device file mem_info_vis_vram_total\n");
>> - return ret;
>> + goto VIS_VRAM_TOTA_FAIL;
>> }
>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_used);
>> if (ret) {
>> DRM_ERROR("Failed to create device file mem_info_vram_used\n");
>> - return ret;
>> + goto VRAM_USED_FAIL;
>> }
>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vis_vram_used);
>> if (ret) {
>> DRM_ERROR("Failed to create device file mem_info_vis_vram_used\n");
>> - return ret;
>> + goto VIS_VRAM_USED_FAIL;
>> }
>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_vendor);
>> if (ret) {
>> DRM_ERROR("Failed to create device file mem_info_vram_vendor\n");
>> - return ret;
>> + goto VRAM_VERDOR_FAIL;
>> }
>>
>> return 0;
>> +
>> +VRAM_VERDOR_FAIL:
>> + device_remove_file(adev->dev, &dev_attr_mem_info_vis_vram_used);
>> +VIS_VRAM_USED_FAIL:
>> + device_remove_file(adev->dev, &dev_attr_mem_info_vram_used);
>> +RVAM_USED_FAIL:
>> + device_remove_file(adev->dev, &dev_attr_mem_info_vis_vram_total);
>> +VIS_VRAM_TOTA_FAIL:
>> + device_remove_file(adev->dev, &dev_attr_mem_info_vram_total);
>> +VRAM_TOTAL_FAIL:
>> + kfree(mgr);
>> + man->priv = NULL;
>> +
>> + return ret;
>> }
>>
>> /**
>
Am 21.04.20 um 14:09 schrieb 赵军奎:
> From: "Christian König" <[email protected]>
> Date: 2020-04-21 19:22:49
> To: Bernard Zhao <[email protected]>,Alex Deucher <[email protected]>,"David (ChunMing) Zhou" <[email protected]>,David Airlie <[email protected]>,Daniel Vetter <[email protected]>,Tom St Denis <[email protected]>,Ori Messinger <[email protected]>,Sam Ravnborg <[email protected]>,[email protected],[email protected],[email protected]
> Cc: [email protected]
> Subject: Re: [PATCH] amdgpu: fixes memleak issue when init failed>Am 21.04.20 um 13:17 schrieb Bernard Zhao:
>>> VRAM manager and DRM MM when init failed, there is no operaction
>>> to free kzalloc memory & remove device file.
>>> This will lead to memleak & cause stability issue.
>> NAK, failure to create sysfs nodes are not critical.
>>
>> Christian.
>>
> OK, get it.
> By the way, should i modify this patch to just handle <kfree(mgr)> in error branch, or that it is also unnecessary?
What you can do is to drop the "return ret" if anything with the sysfs
nodes goes wrong and instead print the error code.
It's really annoying that loading, unloading and loading the driver
again sometimes fails because we have a bug in the sysfs files cleanup.
We certainly should fix those bugs as well, but they are just not
critical for correct driver functionality.
Regards,
Christian.
>
> Regards,
> Bernard
>
>>> Signed-off-by: Bernard Zhao <[email protected]>
>>> ---
>>> drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 24 ++++++++++++++++----
>>> 1 file changed, 19 insertions(+), 5 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>>> index 82a3299e53c0..4c5fb153e6b4 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>>> @@ -175,30 +175,44 @@ static int amdgpu_vram_mgr_init(struct ttm_mem_type_manager *man,
>>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_total);
>>> if (ret) {
>>> DRM_ERROR("Failed to create device file mem_info_vram_total\n");
>>> - return ret;
>>> + goto VRAM_TOTAL_FAIL;
>>> }
>>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vis_vram_total);
>>> if (ret) {
>>> DRM_ERROR("Failed to create device file mem_info_vis_vram_total\n");
>>> - return ret;
>>> + goto VIS_VRAM_TOTA_FAIL;
>>> }
>>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_used);
>>> if (ret) {
>>> DRM_ERROR("Failed to create device file mem_info_vram_used\n");
>>> - return ret;
>>> + goto VRAM_USED_FAIL;
>>> }
>>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vis_vram_used);
>>> if (ret) {
>>> DRM_ERROR("Failed to create device file mem_info_vis_vram_used\n");
>>> - return ret;
>>> + goto VIS_VRAM_USED_FAIL;
>>> }
>>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_vendor);
>>> if (ret) {
>>> DRM_ERROR("Failed to create device file mem_info_vram_vendor\n");
>>> - return ret;
>>> + goto VRAM_VERDOR_FAIL;
>>> }
>>>
>>> return 0;
>>> +
>>> +VRAM_VERDOR_FAIL:
>>> + device_remove_file(adev->dev, &dev_attr_mem_info_vis_vram_used);
>>> +VIS_VRAM_USED_FAIL:
>>> + device_remove_file(adev->dev, &dev_attr_mem_info_vram_used);
>>> +RVAM_USED_FAIL:
>>> + device_remove_file(adev->dev, &dev_attr_mem_info_vis_vram_total);
>>> +VIS_VRAM_TOTA_FAIL:
>>> + device_remove_file(adev->dev, &dev_attr_mem_info_vram_total);
>>> +VRAM_TOTAL_FAIL:
>>> + kfree(mgr);
>>> + man->priv = NULL;
>>> +
>>> + return ret;
>>> }
>>>
>>> /**
>
发件人："Christian König" <[email protected]>
发送日期：2020-04-21 21:02:27
收件人："赵军奎" <[email protected]>
抄送人：Alex Deucher <[email protected]>,"David (ChunMing) Zhou" <[email protected]>,David Airlie <[email protected]>,Daniel Vetter <[email protected]>,Tom St Denis <[email protected]>,Ori Messinger <[email protected]>,Sam Ravnborg <[email protected]>,[email protected],[email protected],[email protected],[email protected]
主题：Re: [PATCH] amdgpu: fixes memleak issue when init failed>Am 21.04.20 um 14:09 schrieb 赵军奎:
>> From: "Christian König" <[email protected]>
>> Date: 2020-04-21 19:22:49
>> To: Bernard Zhao <[email protected]>,Alex Deucher <[email protected]>,"David (ChunMing) Zhou" <[email protected]>,David Airlie <[email protected]>,Daniel Vetter <[email protected]>,Tom St Denis <[email protected]>,Ori Messinger <[email protected]>,Sam Ravnborg <[email protected]>,[email protected],[email protected],[email protected]
>> Cc: [email protected]
>> Subject: Re: [PATCH] amdgpu: fixes memleak issue when init failed>Am 21.04.20 um 13:17 schrieb Bernard Zhao:
>>>> VRAM manager and DRM MM when init failed, there is no operaction
>>>> to free kzalloc memory & remove device file.
>>>> This will lead to memleak & cause stability issue.
>>> NAK, failure to create sysfs nodes are not critical.
>>>
>>> Christian.
>>>
>> OK, get it.
>> By the way, should i modify this patch to just handle <kfree(mgr)> in error branch, or that it is also unnecessary?
>
>What you can do is to drop the "return ret" if anything with the sysfs
>nodes goes wrong and instead print the error code.
Emmm, for this part, i am not sure, my modify first print the error, secone release not free memory,
and last return error, make everything clear to the system.
I think it`s the same with what you mentioned, is there something that I misunderstood?
>
>It's really annoying that loading, unloading and loading the driver
>again sometimes fails because we have a bug in the sysfs files cleanup.
>
>We certainly should fix those bugs as well, but they are just not
>critical for correct driver functionality.
>
>Regards,
>Christian.
>>
>> Regards,
>> Bernard
>>
>>>> Signed-off-by: Bernard Zhao <[email protected]>
>>>> ---
>>>> drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 24 ++++++++++++++++----
>>>> 1 file changed, 19 insertions(+), 5 deletions(-)
>>>>
>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>>>> index 82a3299e53c0..4c5fb153e6b4 100644
>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>>>> @@ -175,30 +175,44 @@ static int amdgpu_vram_mgr_init(struct ttm_mem_type_manager *man,
>>>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_total);
>>>> if (ret) {
>>>> DRM_ERROR("Failed to create device file mem_info_vram_total\n");
>>>> - return ret;
>>>> + goto VRAM_TOTAL_FAIL;
>>>> }
>>>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vis_vram_total);
>>>> if (ret) {
>>>> DRM_ERROR("Failed to create device file mem_info_vis_vram_total\n");
>>>> - return ret;
>>>> + goto VIS_VRAM_TOTA_FAIL;
>>>> }
>>>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_used);
>>>> if (ret) {
>>>> DRM_ERROR("Failed to create device file mem_info_vram_used\n");
>>>> - return ret;
>>>> + goto VRAM_USED_FAIL;
>>>> }
>>>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vis_vram_used);
>>>> if (ret) {
>>>> DRM_ERROR("Failed to create device file mem_info_vis_vram_used\n");
>>>> - return ret;
>>>> + goto VIS_VRAM_USED_FAIL;
>>>> }
>>>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_vendor);
>>>> if (ret) {
>>>> DRM_ERROR("Failed to create device file mem_info_vram_vendor\n");
>>>> - return ret;
>>>> + goto VRAM_VERDOR_FAIL;
>>>> }
>>>>
>>>> return 0;
>>>> +
>>>> +VRAM_VERDOR_FAIL:
>>>> + device_remove_file(adev->dev, &dev_attr_mem_info_vis_vram_used);
>>>> +VIS_VRAM_USED_FAIL:
>>>> + device_remove_file(adev->dev, &dev_attr_mem_info_vram_used);
>>>> +RVAM_USED_FAIL:
>>>> + device_remove_file(adev->dev, &dev_attr_mem_info_vis_vram_total);
>>>> +VIS_VRAM_TOTA_FAIL:
>>>> + device_remove_file(adev->dev, &dev_attr_mem_info_vram_total);
>>>> +VRAM_TOTAL_FAIL:
>>>> + kfree(mgr);
>>>> + man->priv = NULL;
>>>> +
>>>> + return ret;
>>>> }
>>>>
>>>> /**
>>
>
Am 21.04.20 um 15:39 schrieb 赵军奎:
> 发件人："Christian König" <[email protected]>
> 发送日期：2020-04-21 21:02:27
> 收件人："赵军奎" <[email protected]>
> 抄送人：Alex Deucher <[email protected]>,"David (ChunMing) Zhou" <[email protected]>,David Airlie <[email protected]>,Daniel Vetter <[email protected]>,Tom St Denis <[email protected]>,Ori Messinger <[email protected]>,Sam Ravnborg <[email protected]>,[email protected],[email protected],[email protected],[email protected]
> 主题：Re: [PATCH] amdgpu: fixes memleak issue when init failed>Am 21.04.20 um 14:09 schrieb 赵军奎:
>>> From: "Christian König" <[email protected]>
>>> Date: 2020-04-21 19:22:49
>>> To: Bernard Zhao <[email protected]>,Alex Deucher <[email protected]>,"David (ChunMing) Zhou" <[email protected]>,David Airlie <[email protected]>,Daniel Vetter <[email protected]>,Tom St Denis <[email protected]>,Ori Messinger <[email protected]>,Sam Ravnborg <[email protected]>,[email protected],[email protected],[email protected]
>>> Cc: [email protected]
>>> Subject: Re: [PATCH] amdgpu: fixes memleak issue when init failed>Am 21.04.20 um 13:17 schrieb Bernard Zhao:
>>>>> VRAM manager and DRM MM when init failed, there is no operaction
>>>>> to free kzalloc memory & remove device file.
>>>>> This will lead to memleak & cause stability issue.
>>>> NAK, failure to create sysfs nodes are not critical.
>>>>
>>>> Christian.
>>>>
>>> OK, get it.
>>> By the way, should i modify this patch to just handle <kfree(mgr)> in error branch, or that it is also unnecessary?
>> What you can do is to drop the "return ret" if anything with the sysfs
>> nodes goes wrong and instead print the error code.
> Emmm, for this part, i am not sure, my modify first print the error, secone release not free memory,
> and last return error, make everything clear to the system.
> I think it`s the same with what you mentioned, is there something that I misunderstood?
Yes, maybe an example makes it more clear what to do here. Currently we
print and error and return when something with the sysfs files goes wrong:
if (ret) {
DRM_ERROR("Failed to create device file mem_info_vram_total\n");
return ret;
}
But what we should do instead is just to print an error and continue and
in the end return success status:
if (ret)
DRM_ERROR("Failed to create device file mem_info_vram_total
(%d)\n", r);
...
return 0;
Regards,
Christian.
>
>> It's really annoying that loading, unloading and loading the driver
>> again sometimes fails because we have a bug in the sysfs files cleanup.
>>
>> We certainly should fix those bugs as well, but they are just not
>> critical for correct driver functionality.
>>
>> Regards,
>> Christian.
>
>>> Regards,
>>> Bernard
>>>
>>>>> Signed-off-by: Bernard Zhao <[email protected]>
>>>>> ---
>>>>> drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 24 ++++++++++++++++----
>>>>> 1 file changed, 19 insertions(+), 5 deletions(-)
>>>>>
>>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>>>>> index 82a3299e53c0..4c5fb153e6b4 100644
>>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>>>>> @@ -175,30 +175,44 @@ static int amdgpu_vram_mgr_init(struct ttm_mem_type_manager *man,
>>>>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_total);
>>>>> if (ret) {
>>>>> DRM_ERROR("Failed to create device file mem_info_vram_total\n");
>>>>> - return ret;
>>>>> + goto VRAM_TOTAL_FAIL;
>>>>> }
>>>>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vis_vram_total);
>>>>> if (ret) {
>>>>> DRM_ERROR("Failed to create device file mem_info_vis_vram_total\n");
>>>>> - return ret;
>>>>> + goto VIS_VRAM_TOTA_FAIL;
>>>>> }
>>>>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_used);
>>>>> if (ret) {
>>>>> DRM_ERROR("Failed to create device file mem_info_vram_used\n");
>>>>> - return ret;
>>>>> + goto VRAM_USED_FAIL;
>>>>> }
>>>>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vis_vram_used);
>>>>> if (ret) {
>>>>> DRM_ERROR("Failed to create device file mem_info_vis_vram_used\n");
>>>>> - return ret;
>>>>> + goto VIS_VRAM_USED_FAIL;
>>>>> }
>>>>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_vendor);
>>>>> if (ret) {
>>>>> DRM_ERROR("Failed to create device file mem_info_vram_vendor\n");
>>>>> - return ret;
>>>>> + goto VRAM_VERDOR_FAIL;
>>>>> }
>>>>>
>>>>> return 0;
>>>>> +
>>>>> +VRAM_VERDOR_FAIL:
>>>>> + device_remove_file(adev->dev, &dev_attr_mem_info_vis_vram_used);
>>>>> +VIS_VRAM_USED_FAIL:
>>>>> + device_remove_file(adev->dev, &dev_attr_mem_info_vram_used);
>>>>> +RVAM_USED_FAIL:
>>>>> + device_remove_file(adev->dev, &dev_attr_mem_info_vis_vram_total);
>>>>> +VIS_VRAM_TOTA_FAIL:
>>>>> + device_remove_file(adev->dev, &dev_attr_mem_info_vram_total);
>>>>> +VRAM_TOTAL_FAIL:
>>>>> + kfree(mgr);
>>>>> + man->priv = NULL;
>>>>> +
>>>>> + return ret;
>>>>> }
>>>>>
>>>>> /**
>
发件人："Christian König" <[email protected]>
发送日期：2020-04-21 22:53:47
收件人："赵军奎" <[email protected]>
抄送人：Alex Deucher <[email protected]>,"David (ChunMing) Zhou" <[email protected]>,David Airlie <[email protected]>,Daniel Vetter <[email protected]>,Tom St Denis <[email protected]>,Ori Messinger <[email protected]>,Sam Ravnborg <[email protected]>,[email protected],[email protected],[email protected],[email protected]
主题：Re: [PATCH] amdgpu: fixes memleak issue when init failed>Am 21.04.20 um 15:39 schrieb 赵军奎:
>> 发件人："Christian König" <[email protected]>
>> 发送日期：2020-04-21 21:02:27
>> 收件人："赵军奎" <[email protected]>
>> 抄送人：Alex Deucher <[email protected]>,"David (ChunMing) Zhou" <[email protected]>,David Airlie <[email protected]>,Daniel Vetter <[email protected]>,Tom St Denis <[email protected]>,Ori Messinger <[email protected]>,Sam Ravnborg <[email protected]>,[email protected],[email protected],[email protected],[email protected]
>> 主题：Re: [PATCH] amdgpu: fixes memleak issue when init failed>Am 21.04.20 um 14:09 schrieb 赵军奎:
>>>> From: "Christian König" <[email protected]>
>>>> Date: 2020-04-21 19:22:49
>>>> To: Bernard Zhao <[email protected]>,Alex Deucher <[email protected]>,"David (ChunMing) Zhou" <[email protected]>,David Airlie <[email protected]>,Daniel Vetter <[email protected]>,Tom St Denis <[email protected]>,Ori Messinger <[email protected]>,Sam Ravnborg <[email protected]>,[email protected],[email protected],[email protected]
>>>> Cc: [email protected]
>>>> Subject: Re: [PATCH] amdgpu: fixes memleak issue when init failed>Am 21.04.20 um 13:17 schrieb Bernard Zhao:
>>>>>> VRAM manager and DRM MM when init failed, there is no operaction
>>>>>> to free kzalloc memory & remove device file.
>>>>>> This will lead to memleak & cause stability issue.
>>>>> NAK, failure to create sysfs nodes are not critical.
>>>>>
>>>>> Christian.
>>>>>
>>>> OK, get it.
>>>> By the way, should i modify this patch to just handle <kfree(mgr)> in error branch, or that it is also unnecessary?
>>> What you can do is to drop the "return ret" if anything with the sysfs
>>> nodes goes wrong and instead print the error code.
>> Emmm, for this part, i am not sure, my modify first print the error, secone release not free memory,
>> and last return error, make everything clear to the system.
>> I think it`s the same with what you mentioned, is there something that I misunderstood?
>
>Yes, maybe an example makes it more clear what to do here. Currently we
>print and error and return when something with the sysfs files goes wrong:
>
>if (ret) {
> DRM_ERROR("Failed to create device file mem_info_vram_total\n");
> return ret;
>}
>
>But what we should do instead is just to print an error and continue and
>in the end return success status:
>
>if (ret)
> DRM_ERROR("Failed to create device file mem_info_vram_total
>(%d)\n", r);
>
>...
>return 0;
>
>Regards,
>Christian.
>
Emmm, i am still confused about two points:
1 Does that mean there is no failed case in this function?
2 There is no need to free the kzmalloc space(no possibility of memory leak )?
Regards,
Bernard
>>
>>> It's really annoying that loading, unloading and loading the driver
>>> again sometimes fails because we have a bug in the sysfs files cleanup.
>>>
>>> We certainly should fix those bugs as well, but they are just not
>>> critical for correct driver functionality.
>>>
>>> Regards,
>>> Christian.
>>
>>>> Regards,
>>>> Bernard
>>>>
>>>>>> Signed-off-by: Bernard Zhao <[email protected]>
>>>>>> ---
>>>>>> drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 24 ++++++++++++++++----
>>>>>> 1 file changed, 19 insertions(+), 5 deletions(-)
>>>>>>
>>>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>>>>>> index 82a3299e53c0..4c5fb153e6b4 100644
>>>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>>>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>>>>>> @@ -175,30 +175,44 @@ static int amdgpu_vram_mgr_init(struct ttm_mem_type_manager *man,
>>>>>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_total);
>>>>>> if (ret) {
>>>>>> DRM_ERROR("Failed to create device file mem_info_vram_total\n");
>>>>>> - return ret;
>>>>>> + goto VRAM_TOTAL_FAIL;
>>>>>> }
>>>>>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vis_vram_total);
>>>>>> if (ret) {
>>>>>> DRM_ERROR("Failed to create device file mem_info_vis_vram_total\n");
>>>>>> - return ret;
>>>>>> + goto VIS_VRAM_TOTA_FAIL;
>>>>>> }
>>>>>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_used);
>>>>>> if (ret) {
>>>>>> DRM_ERROR("Failed to create device file mem_info_vram_used\n");
>>>>>> - return ret;
>>>>>> + goto VRAM_USED_FAIL;
>>>>>> }
>>>>>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vis_vram_used);
>>>>>> if (ret) {
>>>>>> DRM_ERROR("Failed to create device file mem_info_vis_vram_used\n");
>>>>>> - return ret;
>>>>>> + goto VIS_VRAM_USED_FAIL;
>>>>>> }
>>>>>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_vendor);
>>>>>> if (ret) {
>>>>>> DRM_ERROR("Failed to create device file mem_info_vram_vendor\n");
>>>>>> - return ret;
>>>>>> + goto VRAM_VERDOR_FAIL;
>>>>>> }
>>>>>>
>>>>>> return 0;
>>>>>> +
>>>>>> +VRAM_VERDOR_FAIL:
>>>>>> + device_remove_file(adev->dev, &dev_attr_mem_info_vis_vram_used);
>>>>>> +VIS_VRAM_USED_FAIL:
>>>>>> + device_remove_file(adev->dev, &dev_attr_mem_info_vram_used);
>>>>>> +RVAM_USED_FAIL:
>>>>>> + device_remove_file(adev->dev, &dev_attr_mem_info_vis_vram_total);
>>>>>> +VIS_VRAM_TOTA_FAIL:
>>>>>> + device_remove_file(adev->dev, &dev_attr_mem_info_vram_total);
>>>>>> +VRAM_TOTAL_FAIL:
>>>>>> + kfree(mgr);
>>>>>> + man->priv = NULL;
>>>>>> +
>>>>>> + return ret;
>>>>>> }
>>>>>>
>>>>>> /**
>>
>
Am 22.04.20 um 02:56 schrieb 赵军奎:
> 发件人："Christian König" <[email protected]>
> 发送日期：2020-04-21 22:53:47
> 收件人："赵军奎" <[email protected]>
> 抄送人：Alex Deucher <[email protected]>,"David (ChunMing) Zhou" <[email protected]>,David Airlie <[email protected]>,Daniel Vetter <[email protected]>,Tom St Denis <[email protected]>,Ori Messinger <[email protected]>,Sam Ravnborg <[email protected]>,[email protected],[email protected],[email protected],[email protected]
> 主题：Re: [PATCH] amdgpu: fixes memleak issue when init failed>Am 21.04.20 um 15:39 schrieb 赵军奎:
>>> 发件人："Christian König" <[email protected]>
>>> 发送日期：2020-04-21 21:02:27
>>> 收件人："赵军奎" <[email protected]>
>>> 抄送人：Alex Deucher <[email protected]>,"David (ChunMing) Zhou" <[email protected]>,David Airlie <[email protected]>,Daniel Vetter <[email protected]>,Tom St Denis <[email protected]>,Ori Messinger <[email protected]>,Sam Ravnborg <[email protected]>,[email protected],[email protected],[email protected],[email protected]
>>> 主题：Re: [PATCH] amdgpu: fixes memleak issue when init failed>Am 21.04.20 um 14:09 schrieb 赵军奎:
>>>>> From: "Christian König" <[email protected]>
>>>>> Date: 2020-04-21 19:22:49
>>>>> To: Bernard Zhao <[email protected]>,Alex Deucher <[email protected]>,"David (ChunMing) Zhou" <[email protected]>,David Airlie <[email protected]>,Daniel Vetter <[email protected]>,Tom St Denis <[email protected]>,Ori Messinger <[email protected]>,Sam Ravnborg <[email protected]>,[email protected],[email protected],[email protected]
>>>>> Cc: [email protected]
>>>>> Subject: Re: [PATCH] amdgpu: fixes memleak issue when init failed>Am 21.04.20 um 13:17 schrieb Bernard Zhao:
>>>>>>> VRAM manager and DRM MM when init failed, there is no operaction
>>>>>>> to free kzalloc memory & remove device file.
>>>>>>> This will lead to memleak & cause stability issue.
>>>>>> NAK, failure to create sysfs nodes are not critical.
>>>>>>
>>>>>> Christian.
>>>>>>
>>>>> OK, get it.
>>>>> By the way, should i modify this patch to just handle <kfree(mgr)> in error branch, or that it is also unnecessary?
>>>> What you can do is to drop the "return ret" if anything with the sysfs
>>>> nodes goes wrong and instead print the error code.
>>> Emmm, for this part, i am not sure, my modify first print the error, secone release not free memory,
>>> and last return error, make everything clear to the system.
>>> I think it`s the same with what you mentioned, is there something that I misunderstood?
>> Yes, maybe an example makes it more clear what to do here. Currently we
>> print and error and return when something with the sysfs files goes wrong:
>>
>> if (ret) {
>> DRM_ERROR("Failed to create device file mem_info_vram_total\n");
>> return ret;
>> }
>>
>> But what we should do instead is just to print an error and continue and
>> in the end return success status:
>>
>> if (ret)
>> DRM_ERROR("Failed to create device file mem_info_vram_total
>> (%d)\n", r);
>>
>> ...
>> return 0;
>>
>> Regards,
>> Christian.
>>
> Emmm, i am still confused about two points:
> 1 Does that mean there is no failed case in this function?
Well the kzalloc can still fail.
> 2 There is no need to free the kzmalloc space(no possibility of memory leak )?
Correct, yes.
Regards,
Christian.
>
> Regards,
> Bernard
>
>>>> It's really annoying that loading, unloading and loading the driver
>>>> again sometimes fails because we have a bug in the sysfs files cleanup.
>>>>
>>>> We certainly should fix those bugs as well, but they are just not
>>>> critical for correct driver functionality.
>>>>
>>>> Regards,
>>>> Christian.
>>>>> Regards,
>>>>> Bernard
>>>>>
>>>>>>> Signed-off-by: Bernard Zhao <[email protected]>
>>>>>>> ---
>>>>>>> drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 24 ++++++++++++++++----
>>>>>>> 1 file changed, 19 insertions(+), 5 deletions(-)
>>>>>>>
>>>>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>>>>>>> index 82a3299e53c0..4c5fb153e6b4 100644
>>>>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>>>>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>>>>>>> @@ -175,30 +175,44 @@ static int amdgpu_vram_mgr_init(struct ttm_mem_type_manager *man,
>>>>>>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_total);
>>>>>>> if (ret) {
>>>>>>> DRM_ERROR("Failed to create device file mem_info_vram_total\n");
>>>>>>> - return ret;
>>>>>>> + goto VRAM_TOTAL_FAIL;
>>>>>>> }
>>>>>>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vis_vram_total);
>>>>>>> if (ret) {
>>>>>>> DRM_ERROR("Failed to create device file mem_info_vis_vram_total\n");
>>>>>>> - return ret;
>>>>>>> + goto VIS_VRAM_TOTA_FAIL;
>>>>>>> }
>>>>>>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_used);
>>>>>>> if (ret) {
>>>>>>> DRM_ERROR("Failed to create device file mem_info_vram_used\n");
>>>>>>> - return ret;
>>>>>>> + goto VRAM_USED_FAIL;
>>>>>>> }
>>>>>>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vis_vram_used);
>>>>>>> if (ret) {
>>>>>>> DRM_ERROR("Failed to create device file mem_info_vis_vram_used\n");
>>>>>>> - return ret;
>>>>>>> + goto VIS_VRAM_USED_FAIL;
>>>>>>> }
>>>>>>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_vendor);
>>>>>>> if (ret) {
>>>>>>> DRM_ERROR("Failed to create device file mem_info_vram_vendor\n");
>>>>>>> - return ret;
>>>>>>> + goto VRAM_VERDOR_FAIL;
>>>>>>> }
>>>>>>>
>>>>>>> return 0;
>>>>>>> +
>>>>>>> +VRAM_VERDOR_FAIL:
>>>>>>> + device_remove_file(adev->dev, &dev_attr_mem_info_vis_vram_used);
>>>>>>> +VIS_VRAM_USED_FAIL:
>>>>>>> + device_remove_file(adev->dev, &dev_attr_mem_info_vram_used);
>>>>>>> +RVAM_USED_FAIL:
>>>>>>> + device_remove_file(adev->dev, &dev_attr_mem_info_vis_vram_total);
>>>>>>> +VIS_VRAM_TOTA_FAIL:
>>>>>>> + device_remove_file(adev->dev, &dev_attr_mem_info_vram_total);
>>>>>>> +VRAM_TOTAL_FAIL:
>>>>>>> + kfree(mgr);
>>>>>>> + man->priv = NULL;
>>>>>>> +
>>>>>>> + return ret;
>>>>>>> }
>>>>>>>
>>>>>>> /**
>
>-----Original Message-----
>From: dri-devel <[email protected]> On Behalf Of
>Bernard Zhao
>Sent: Tuesday, April 21, 2020 7:17 AM
>To: Alex Deucher <[email protected]>; Christian K?nig
><[email protected]>; David (ChunMing) Zhou
><[email protected]>; David Airlie <[email protected]>; Daniel Vetter
><[email protected]>; Tom St Denis <[email protected]>; Ori Messinger
><[email protected]>; Sam Ravnborg <[email protected]>; Bernard
>Zhao <[email protected]>; [email protected]; dri-
>[email protected]; [email protected]
>Cc: [email protected]
>Subject: [PATCH] amdgpu: fixes memleak issue when init failed
>
>VRAM manager and DRM MM when init failed, there is no operaction
>to free kzalloc memory & remove device file.
>This will lead to memleak & cause stability issue.
>
>Signed-off-by: Bernard Zhao <[email protected]>
>---
> drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 24
>++++++++++++++++----
> 1 file changed, 19 insertions(+), 5 deletions(-)
>
>diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>index 82a3299e53c0..4c5fb153e6b4 100644
>--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>@@ -175,30 +175,44 @@ static int amdgpu_vram_mgr_init(struct
>ttm_mem_type_manager *man,
> ret = device_create_file(adev->dev,
>&dev_attr_mem_info_vram_total);
> if (ret) {
> DRM_ERROR("Failed to create device file
>mem_info_vram_total\n");
>- return ret;
>+ goto VRAM_TOTAL_FAIL;
> }
> ret = device_create_file(adev->dev,
>&dev_attr_mem_info_vis_vram_total);
Have you looked at the DEVICE_ATTR mechanism?
It is set up to add device files. You won't get the granularity of each file,
but it has a lot more automatic-ness to setting this stuff up.
Mike
> if (ret) {
> DRM_ERROR("Failed to create device file
>mem_info_vis_vram_total\n");
>- return ret;
>+ goto VIS_VRAM_TOTA_FAIL;
> }
> ret = device_create_file(adev->dev,
>&dev_attr_mem_info_vram_used);
> if (ret) {
> DRM_ERROR("Failed to create device file
>mem_info_vram_used\n");
>- return ret;
>+ goto VRAM_USED_FAIL;
> }
> ret = device_create_file(adev->dev,
>&dev_attr_mem_info_vis_vram_used);
> if (ret) {
> DRM_ERROR("Failed to create device file
>mem_info_vis_vram_used\n");
>- return ret;
>+ goto VIS_VRAM_USED_FAIL;
> }
> ret = device_create_file(adev->dev,
>&dev_attr_mem_info_vram_vendor);
> if (ret) {
> DRM_ERROR("Failed to create device file
>mem_info_vram_vendor\n");
>- return ret;
>+ goto VRAM_VERDOR_FAIL;
> }
>
> return 0;
>+
>+VRAM_VERDOR_FAIL:
>+ device_remove_file(adev->dev,
>&dev_attr_mem_info_vis_vram_used);
>+VIS_VRAM_USED_FAIL:
>+ device_remove_file(adev->dev, &dev_attr_mem_info_vram_used);
>+RVAM_USED_FAIL:
>+ device_remove_file(adev->dev,
>&dev_attr_mem_info_vis_vram_total);
>+VIS_VRAM_TOTA_FAIL:
>+ device_remove_file(adev->dev, &dev_attr_mem_info_vram_total);
>+VRAM_TOTAL_FAIL:
>+ kfree(mgr);
>+ man->priv = NULL;
>+
>+ return ret;
> }
>
> /**
>--
>2.26.2
>
>_______________________________________________
>dri-devel mailing list
>[email protected]
>https://lists.freedesktop.org/mailman/listinfo/dri-devel
Am 22.04.20 um 17:51 schrieb Ruhl, Michael J:
>> -----Original Message-----
>> From: dri-devel <[email protected]> On Behalf Of
>> Bernard Zhao
>> Sent: Tuesday, April 21, 2020 7:17 AM
>> To: Alex Deucher <[email protected]>; Christian König
>> <[email protected]>; David (ChunMing) Zhou
>> <[email protected]>; David Airlie <[email protected]>; Daniel Vetter
>> <[email protected]>; Tom St Denis <[email protected]>; Ori Messinger
>> <[email protected]>; Sam Ravnborg <[email protected]>; Bernard
>> Zhao <[email protected]>; [email protected]; dri-
>> [email protected]; [email protected]
>> Cc: [email protected]
>> Subject: [PATCH] amdgpu: fixes memleak issue when init failed
>>
>> VRAM manager and DRM MM when init failed, there is no operaction
>> to free kzalloc memory & remove device file.
>> This will lead to memleak & cause stability issue.
>>
>> Signed-off-by: Bernard Zhao <[email protected]>
>> ---
>> drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 24
>> ++++++++++++++++----
>> 1 file changed, 19 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>> index 82a3299e53c0..4c5fb153e6b4 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>> @@ -175,30 +175,44 @@ static int amdgpu_vram_mgr_init(struct
>> ttm_mem_type_manager *man,
>> ret = device_create_file(adev->dev,
>> &dev_attr_mem_info_vram_total);
>> if (ret) {
>> DRM_ERROR("Failed to create device file
>> mem_info_vram_total\n");
>> - return ret;
>> + goto VRAM_TOTAL_FAIL;
>> }
>> ret = device_create_file(adev->dev,
>> &dev_attr_mem_info_vis_vram_total);
> Have you looked at the DEVICE_ATTR mechanism?
Yeah, I've thought about that as well. But didn't had time to look into
detail if that could be applied here or not.
Regards,
Christian.
>
> It is set up to add device files. You won't get the granularity of each file,
> but it has a lot more automatic-ness to setting this stuff up.
>
> Mike
>
>> if (ret) {
>> DRM_ERROR("Failed to create device file
>> mem_info_vis_vram_total\n");
>> - return ret;
>> + goto VIS_VRAM_TOTA_FAIL;
>> }
>> ret = device_create_file(adev->dev,
>> &dev_attr_mem_info_vram_used);
>> if (ret) {
>> DRM_ERROR("Failed to create device file
>> mem_info_vram_used\n");
>> - return ret;
>> + goto VRAM_USED_FAIL;
>> }
>> ret = device_create_file(adev->dev,
>> &dev_attr_mem_info_vis_vram_used);
>> if (ret) {
>> DRM_ERROR("Failed to create device file
>> mem_info_vis_vram_used\n");
>> - return ret;
>> + goto VIS_VRAM_USED_FAIL;
>> }
>> ret = device_create_file(adev->dev,
>> &dev_attr_mem_info_vram_vendor);
>> if (ret) {
>> DRM_ERROR("Failed to create device file
>> mem_info_vram_vendor\n");
>> - return ret;
>> + goto VRAM_VERDOR_FAIL;
>> }
>>
>> return 0;
>> +
>> +VRAM_VERDOR_FAIL:
>> + device_remove_file(adev->dev,
>> &dev_attr_mem_info_vis_vram_used);
>> +VIS_VRAM_USED_FAIL:
>> + device_remove_file(adev->dev, &dev_attr_mem_info_vram_used);
>> +RVAM_USED_FAIL:
>> + device_remove_file(adev->dev,
>> &dev_attr_mem_info_vis_vram_total);
>> +VIS_VRAM_TOTA_FAIL:
>> + device_remove_file(adev->dev, &dev_attr_mem_info_vram_total);
>> +VRAM_TOTAL_FAIL:
>> + kfree(mgr);
>> + man->priv = NULL;
>> +
>> + return ret;
>> }
>>
>> /**
>> --
>> 2.26.2
>>
>> _______________________________________________
>> dri-devel mailing list
>> [email protected]
>> https://lists.freedesktop.org/mailman/listinfo/dri-devel
> _______________________________________________
> amd-gfx mailing list
> [email protected]
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx