Re: [Qemu-devel] [PATCH v3 7/8] xen_disk: use a single entry iovec

2018-05-17 Thread Anthony PERARD
On Fri, May 04, 2018 at 08:26:06PM +0100, Paul Durrant wrote: > Since xen_disk now always copies data to and from a guest there is no need > to maintain a vector entry corresponding to every page of a request. > This means there is less per-request state to maintain so the ioreq > structure can

[Qemu-devel] [PATCH v3 7/8] xen_disk: use a single entry iovec

2018-05-04 Thread Paul Durrant
Since xen_disk now always copies data to and from a guest there is no need to maintain a vector entry corresponding to every page of a request. This means there is less per-request state to maintain so the ioreq structure can shrink significantly. Signed-off-by: Paul Durrant