Re: [PATCH] arm64: Enable PCI write-combine resources under sysfs

Benjamin Herrenschmidt
2020-09-01T23:23:17Z

On Tue, 2020-09-01 at 13:37 -0500, Bjorn Helgaas wrote:
> On Mon, Aug 31, 2020 at 03:18:27PM +0000, Clint Sbisa wrote:
> > Using write-combine is crucial for performance of PCI devices where
> > significant amounts of transactions go over PCI BARs.
> >
> > arm64 supports write-combine PCI mappings, so the appropriate
> > define
> > has been added which will expose write-combine mappings under sysfs
> > for prefetchable PCI resources.
> >
> > Signed-off-by: Clint Sbisa <csbisa@amazon.com>
>
> Fine with me, I assume Will or Catalin will apply this.

Haha ! Client had sent it to them originally and I told him to resend
it to linux-pci, yourself and Lorenzo :-)

So the confusion is on me.

Will, Catalin, it's all yours. You should have the original patch in
your mbox already, otherwise:

https://patchwork.kernel.org/patch/11729875/

Cheers,
Ben.