Re: [Qemu-devel] [PATCH] xen: use native disk xenbus protocol if possible

2016-06-29 Thread Juergen Gross
On 29/06/16 17:20, Anthony PERARD wrote: > On Fri, Jun 17, 2016 at 01:14:56PM +0200, Juergen Gross wrote: >> The qdisk implementation is using the native xenbus protocol only in >> case of no protocol specified at all. As using the explicit 32- or >> 64-bit protocol is slower than the native one du

Re: [Qemu-devel] [PATCH] xen: use native disk xenbus protocol if possible

2016-06-29 Thread Anthony PERARD
On Fri, Jun 17, 2016 at 01:14:56PM +0200, Juergen Gross wrote: > The qdisk implementation is using the native xenbus protocol only in > case of no protocol specified at all. As using the explicit 32- or > 64-bit protocol is slower than the native one due to copying requests > not by memcpy but elem

[Qemu-devel] [PATCH] xen: use native disk xenbus protocol if possible

2016-06-17 Thread Juergen Gross
The qdisk implementation is using the native xenbus protocol only in case of no protocol specified at all. As using the explicit 32- or 64-bit protocol is slower than the native one due to copying requests not by memcpy but element for element, this is not optimal. Correct this by using the native