On Tue, 17 Apr 2018, 'Christoph Hellwig' wrote:
> On Tue, Apr 17, 2018 at 10:54:37AM +0200, Thomas Gleixner wrote:
> > The question was rather to have a list of PCI IDs for those chipsets which
> > have the problem and set the 'disable' flag only for those. That makes a lot
> > more sense than maki
On Tue, Apr 17, 2018 at 10:54:37AM +0200, Thomas Gleixner wrote:
> The question was rather to have a list of PCI IDs for those chipsets which
> have the problem and set the 'disable' flag only for those. That makes a lot
> more sense than making a list of new chips which disable the disable flag.
On Tue, 17 Apr 2018, David Wang wrote:
> > On Mon, Apr 16, 2018 at 05:26:56PM +0800, David Wang wrote:
> > > PCI bridges integrated in new VIA chipset/SoC have no DAC issue.
> > > Enable DAC for the platforms with these chipset/SoC can improve DMA
> > > performance about 20% when DRAM size > 4GB.
>
lliance.com;
> cooper...@zhaoxin.com; qiyuanw...@zhaoxin.com;
> benjamin...@viatech.com; luke...@viacpu.com; tim...@zhaoxin.com
> 主题: Re: [PATCH] x86/dma-mapping: override via_no_dac for new VIA PCI
> bridges
>
> On Mon, Apr 16, 2018 at 05:26:56PM +0800, David Wang wrote:
> >
On Mon, Apr 16, 2018 at 05:26:56PM +0800, David Wang wrote:
> PCI bridges integrated in new VIA chipset/SoC have no DAC issue.
> Enable DAC for the platforms with these chipset/SoC can improve DMA
> performance about
> 20% when DRAM size > 4GB.
>
So we get an exception to an exception? Is there
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