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

On 9/5/18 2:18 PM, Logan Gunthorpe wrote:

On 05/09/18 02:14 PM, Jens Axboe wrote:

quoted

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