On Tue, Jun 10, 2025 at 07:06:39AM +0200, Christoph Hellwig wrote: > 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> > --- > block/bio-integrity.c | 3 +++ > block/bio.c | 20 +++++++++++++------- > include/linux/blk_types.h | 2 ++ > 3 files changed, 18 insertions(+), 7 deletions(-) > Thanks, Reviewed-by: Leon Romanovsky <leonro@xxxxxxxxxx>
