On Tue, Jun 08, 2021 at 03:16:29PM +0200, Paolo Bonzini wrote: > I/O to a disk via read/write is not limited by the number of segments allowed > by the host adapter; the kernel can split requests if needed, and the limit > imposed by the host adapter can be very low (256k or so) to avoid that SG_IO > returns EINVAL if memory is heavily fragmented.
to avoid SG_IO returning EINVAL > > Since this value is only interesting for SG_IO-based I/O, do not include > it in the max_transfer and only take it into account when patching the > block limits VPD page in the scsi-generic device. > > Signed-off-by: Paolo Bonzini <[email protected]> > --- > block/file-posix.c | 3 +-- > hw/scsi/scsi-generic.c | 6 ++++-- > 2 files changed, 5 insertions(+), 4 deletions(-) > Reviewed-by: Eric Blake <[email protected]> -- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3266 Virtualization: qemu.org | libvirt.org
