Re: [PATCH v5 07/13] block: Add PCI P2P flag for request queue and check support for requests

Jens Axboe
2018-09-05T20:19:42Z

On 9/5/18 2:18 PM, Logan Gunthorpe wrote:
>
>
> On 05/09/18 02:14 PM, Jens Axboe wrote:
>> But if the caller must absolutely know where the bio will end up, then
>> it seems super redundant. So I'd vote for killing this check, it buys
>> us absolutely nothing and isn't even exhaustive in its current form.
>
>
> Ok, I'll remove it for v6.

Since the drivers needs to know it's doing it right, it might not
hurt to add a sanity check helper for that. Just have the driver
call it, and don't add it in the normal IO submission path.

--
Jens Axboe