Re: [PATCH RFC 00/12] Adapt drivers to handle page combining on umem SGEs

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On Fri, Feb 08, 2019 at 09:20:04AM -0700, Jason Gunthorpe wrote:
> On Sat, Jan 26, 2019 at 10:59:01AM -0600, Shiraz Saleem wrote:
> > From: "Saleem, Shiraz" <shiraz.saleem@xxxxxxxxx>
> > 
> > This patch set serves as precursor series to updating ib_umem_get
> > to combine contiguous PAGE_SIZE pages in umem SGEs.
> > 
> > Drivers are updated to unfold larger SGEs into PAGE_SIZE elements
> > when walking the umem DMA-mapped SGL. The for_each_sg_dma_page
> > variant is used where applicable to iterate the pages of the
> > SGL and get the page DMA address.
> > 
> > Additionally, umem->page_shift usage is purged in drivers
> > as its only relevant for ODP MRs. Use system page size and
> > shift instead.
> > 
> > This series is dependent on the new scatterlist API
> > for_each_sg_dma_page which is pending acceptance.
> > 
> > https://patchwork.kernel.org/patch/10748901/
> 
> I think we are good to go on this now.
> 
> Is there any reason this is a RFC at this point?
> 
No. I ll resend removing the rfc tag. Thanks for taking care of
instrumenting the new scatterlist API.

Shiraz



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