On Fri, 28 Jun 2013, Alex Bligh wrote: > Stefano, > > --On 27 June 2013 19:16:30 +0100 Stefano Stabellini > <stefano.stabell...@eu.citrix.com> wrote: > > > * Therefore this option gives the backend permission to use > > * O_DIRECT, notwithstanding that bug. > > Looks useful. Are you planning to do this for both emulated and pv > disks?
This is PV only, at least for the moment: emulated disks always use writeback caching. >From the performance point of view, making this change for IDE disks is not very important (because IDE is slow anyway).
