Hi Robin,
On 12/07/2018 09:17 PM, Robin Murphy wrote:
> On 07/12/2018 05:49, Dongli Zhang wrote:
>>
>>
>> On 12/07/2018 12:12 AM, Joe Jin wrote:
>>> Hi Dongli,
>>>
>>> Maybe move d_swiotlb_usage declare into swiotlb_create_debugfs():
>>
>> I assume the call of swiotlb_tbl_map_single() might be fre
On 07/12/2018 05:49, Dongli Zhang wrote:
On 12/07/2018 12:12 AM, Joe Jin wrote:
Hi Dongli,
Maybe move d_swiotlb_usage declare into swiotlb_create_debugfs():
I assume the call of swiotlb_tbl_map_single() might be frequent in some
situations, e.g., when 'swiotlb=force'.
That's why I declare
On 12/6/18 9:49 PM, Dongli Zhang wrote:
>
>
> On 12/07/2018 12:12 AM, Joe Jin wrote:
>> Hi Dongli,
>>
>> Maybe move d_swiotlb_usage declare into swiotlb_create_debugfs():
>
> I assume the call of swiotlb_tbl_map_single() might be frequent in some
> situations, e.g., when 'swiotlb=force'.
>
> Th
On 12/07/2018 12:12 AM, Joe Jin wrote:
> Hi Dongli,
>
> Maybe move d_swiotlb_usage declare into swiotlb_create_debugfs():
I assume the call of swiotlb_tbl_map_single() might be frequent in some
situations, e.g., when 'swiotlb=force'.
That's why I declare the d_swiotlb_usage out of any functio
Hi Dongli,
Maybe move d_swiotlb_usage declare into swiotlb_create_debugfs():
void swiotlb_create_debugfs(void)
{
#ifdef CONFIG_DEBUG_FS
static struct dentry *d_swiotlb_usage = NULL;
if (d_swiotlb_usage)
return;
d_swiotlb_usage = debugfs_create_dir("swiotl
The device driver will not be able to do dma operations once swiotlb buffer
is full, either because the driver is using so many IO TLB blocks inflight,
or because there is memory leak issue in device driver. To export the
swiotlb buffer usage via debugfs would help the user estimate the size of
swi
