[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] tools/firmware: use a canned config for seabios
> -----Original Message----- > From: Wei Liu [mailto:wei.liu2@xxxxxxxxxx] > Sent: 24 March 2017 11:47 > To: Paul Durrant <Paul.Durrant@xxxxxxxxxx> > Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx; Ian Jackson <Ian.Jackson@xxxxxxxxxx>; > Wei Liu <wei.liu2@xxxxxxxxxx> > 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@xxxxxxxxxxxxx https://lists.xen.org/xen-devel
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