On 22/08/2018 15:56, Robin Murphy wrote:

Hi John,

On 22/08/18 14:44, John Garry wrote:

quoted

On 21/09/2017 09:59, Ganapatrao Kulkarni wrote:

quoted

Adding numa aware memory allocations used for iommu dma allocation and
memory allocated for SMMU stream tables, page walk tables and command
queues.

With this patch, iperf testing on ThunderX2, with 40G NIC card on
NODE 1 PCI shown same performance(around 30% improvement) as NODE 0.

Ganapatrao Kulkarni (4):
  mm: move function alloc_pages_exact_nid out of __meminit
  numa, iommu/io-pgtable-arm: Use NUMA aware memory allocation for smmu
    translation tables
  iommu/arm-smmu-v3: Use NUMA memory allocations for stream tables and
    comamnd queues
  iommu/dma, numa: Use NUMA aware memory allocations in
    __iommu_dma_alloc_pages

 drivers/iommu/arm-smmu-v3.c    | 57
+++++++++++++++++++++++++++++++++++++-----
 drivers/iommu/dma-iommu.c      | 17 +++++++------
 drivers/iommu/io-pgtable-arm.c |  4 ++-
 include/linux/gfp.h            |  2 +-
 mm/page_alloc.c                |  3 ++-
 5 files changed, 67 insertions(+), 16 deletions(-)

Hi Ganapatrao,

Have you any plans for further work on this patchset? I have not seen
anything since this v1 was posted+discussed.

Hi Robin,

Thanks for the info. I thought I remembered 4b12 but couldn't put my 
finger on it.

Looks like I ended up doing the version of the io-pgtable change that I
suggested here, which was merged recently (4b123757eeaa). Patch #3
should also be effectively obsolete now since the SWIOTLB/dma-direct
rework (21f237e4d085). Apparently I also started reworking patch #4 in
my tree at some point but sidelined it - I think that was at least
partly due to another thread[1] which made it seem less clear-cut
whether this is always the right thing to do.

Right, so #4 seems less straightforward and not directly related to 
IOMMU driver anyway.

Cheers,
John

Robin.

[1]
https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1693026.html

.