Sheng Zhao 3fc3068e72 vduse: Use fixed 4KB bounce pages for non-4KB page size ...

The allocation granularity of bounce pages is PAGE_SIZE. This may cause
even small IO requests to occupy an entire bounce page exclusively. The
kind of memory waste will be more significant when PAGE_SIZE is larger
than 4KB (e.g. arm64 with 64KB pages).

So, optimize it by using fixed 4KB bounce maps and iova allocation
granularity. A single IO request occupies at least a 4KB bounce page
instead of the entire memory page of PAGE_SIZE.

Signed-off-by: Sheng Zhao <sheng.zhao@bytedance.com>
Message-Id: <20250925113516.60305-1-sheng.zhao@bytedance.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

2025-10-01 07:24:55 -04:00

..

alibaba

vdpa: introduce map ops

2025-10-01 07:24:55 -04:00

ifcvf

vdpa: introduce map ops

2025-10-01 07:24:55 -04:00

mlx5

vdpa: introduce map ops

2025-10-01 07:24:55 -04:00

octeon_ep

vdpa: introduce map ops

2025-10-01 07:24:55 -04:00

pds

vdpa: introduce map ops

2025-10-01 07:24:55 -04:00

solidrun

vdpa: introduce map ops

2025-10-01 07:24:55 -04:00

vdpa_sim

vdpa: introduce map ops

2025-10-01 07:24:55 -04:00

vdpa_user

vduse: Use fixed 4KB bounce pages for non-4KB page size

2025-10-01 07:24:55 -04:00

virtio_pci

vdpa: introduce map ops

2025-10-01 07:24:55 -04:00

Kconfig

vduse: switch to use virtio map API instead of DMA API

2025-10-01 07:24:55 -04:00

Makefile

virtio: vdpa: vDPA driver for Marvell OCTEON DPU devices

2024-07-09 08:42:39 -04:00

vdpa.c

vdpa: introduce map ops

2025-10-01 07:24:55 -04:00