> -----Original Message----- > From: Wei Liu [mailto:wei.l...@citrix.com] > Sent: 24 March 2017 11:47 > To: Paul Durrant <paul.durr...@citrix.com> > Cc: xen-de...@lists.xenproject.org; Ian Jackson <ian.jack...@citrix.com>; > Wei Liu <wei.l...@citrix.com> > Subject: Re: [PATCH] tools/firmware: use a canned config for seabios > > On Thu, Mar 23, 2017 at 05:03:09PM +0000, Paul Durrant wrote: > > The use of seabios defconfig kills boot performance of Windows guests > > because the default is for the int13 handler to use PIO when accessing > > the emulated IDE device. > > > > By instead using a canned configuration with the ATA settings overridden > > to enable DMA access (and also wider PIO) boot performance is markedly > > improved without the need to use a different (and possibly not supported) > > device model. > > > > This patch adds the canned configuration into tools/firmware and modifies > > the Makefile rule to copy it into place. > > > > I think at some point someone (you?) tried to change the default > upstream, what was the outcome? >
Yes I tried that. The maintainers nacked the patch. > I'm not against shipping a default config, but that wouldn't benefit all > the distros that use their own seabios packages. > No, but the status quo sucks. One hopes distros building their own Xen packages already choose a better firmware config. This patch makes the config for those rolling their own firmware better (and I suspect that's quite a few folks). Paul > Wei. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
