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SubjectRe: [PATCH 0/4] numa, iommu/smmu: IOMMU/SMMU driver optimization for NUMA systems
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On 22/08/2018 15:56, Robin Murphy wrote:
> Hi John,
>
> On 22/08/18 14:44, John Garry wrote:
>> On 21/09/2017 09:59, Ganapatrao Kulkarni wrote:
>>> 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
>
> .
>


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