On Fri, Nov 30, 2018 at 07:14:00PM +0800, John Garry wrote: > From: Ganapatrao Kulkarni <ganapatrao.kulka...@cavium.com> > > Change function __iommu_dma_alloc_pages() to allocate pages for DMA from > respective device NUMA node. The ternary operator which would be for > alloc_pages_node() is tidied along with this. > > The motivation for this change is to have a policy for page allocation > consistent with direct DMA mapping, which attempts to allocate pages local > to the device, as mentioned in [1]. > > In addition, for certain workloads it has been observed a marginal > performance improvement. The patch caused an observation of 0.9% average > throughput improvement for running tcrypt with HiSilicon crypto engine. > > We also include a modification to use kvzalloc() for kzalloc()/vzalloc() > combination. > > [1] https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1692998.html > > Signed-off-by: Ganapatrao Kulkarni <ganapatrao.kulka...@cavium.com> > [JPG: Added kvzalloc(), drop pages ** being device local, remove ternary > operator, update message] > Signed-off-by: John Garry <john.ga...@huawei.com>
Applied, thanks.
