On Wed, Feb 28, 2018 at 05:00:58PM +0100, Marc-André Lureau wrote: > Hi > > On Wed, Feb 28, 2018 at 4:48 PM, Michael S. Tsirkin <m...@redhat.com> wrote: > > On Wed, Feb 28, 2018 at 04:41:51PM +0100, Marc-André Lureau wrote: > >> I don't know if it's always safe to enable dma in read_raw(), how > >> could we know? Is there a check we could use to choose one or ther > >> other (and thus avoiding explicit dma/readfn argument)? > > > > I'm not sure - but does it really matter? Is anyone reading large files > > like this in production where speed matters? > > Why even bother with DMA? > > The difference is quite significante for not so small files, as shown above. > > And if they access the fw_cfg entries at boot time, or when starting > things etc, this may speed things up.
Question would be whether anyone at all does this. -- MST
