On Mon, 18 Jun 2012 16:03:23 +0800, Asias He <asias@xxxxxxxxxx> wrote: > On 06/18/2012 03:46 PM, Rusty Russell wrote: > > On Mon, 18 Jun 2012 14:53:10 +0800, Asias He <asias@xxxxxxxxxx> wrote: > >> This patch introduces bio-based IO path for virtio-blk. > > > > Why make it optional? > > request-based IO path is useful for users who do not want to bypass the > IO scheduler in guest kernel, e.g. users using spinning disk. For users > using fast disk device, e.g. SSD device, they can use bio-based IO path. Users using a spinning disk still get IO scheduling in the host though. What benefit is there in doing it in the guest as well? Cheers, Rusty. _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
