On 2024-10-27 08:21, Leon Romanovsky wrote: > From: Christoph Hellwig <hch@xxxxxx> > > To get out of the dma mapping helpers having to check every segment for > it's P2P status, ensure that bios either contain P2P transfers or non-P2P > transfers, and that a P2P bio only contains ranges from a single device. > > This means we do the page zone access in the bio add path where it should > be still page hot, and will only have do the fairly expensive P2P topology > lookup once per bio down in the dma mapping path, and only for already > marked bios. > > Signed-off-by: Christoph Hellwig <hch@xxxxxx> > Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxx> Looks good to me. Reviewed-by: Logan Gunthorpe <logang@xxxxxxxxxxxx>
