On 08.07.22 06:17, Stefan Hajnoczi wrote:
Register guest RAM using BlockRAMRegistrar and set the
BDRV_REQ_REGISTERED_BUF flag so block drivers can optimize memory
accesses in I/O requests.
This is for vdpa-blk, vhost-user-blk, and other I/O interfaces that rely
on DMA mapping/unmapping.
Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com>
---
include/hw/virtio/virtio-blk.h | 2 ++
hw/block/virtio-blk.c | 13 +++++++++----
2 files changed, 11 insertions(+), 4 deletions(-)
Seems fair, but as said on patch 5, I’m quite wary of “register guest
RAM”. How can we guarantee that it won’t be too fragmented to be
registerable with either nvme.c or blkio.c?
Hanna
