w...@kernel.org;
>> ganapatrao.kulka...@cavium.com; catalin.mari...@arm.com;
>> a...@linux-foundation.org
>> Cc: iommu@lists.linux-foundation.org; linux-arm-ker...@lists.infradead.org;
>> linux-ker...@vger.kernel.org; Zengtao (B) ;
>> huangdaode ; Linuxarm
>> Subject:
@linux-foundation.org
> Cc: iommu@lists.linux-foundation.org; linux-arm-ker...@lists.infradead.org;
> linux-ker...@vger.kernel.org; Zengtao (B) ;
> huangdaode ; Linuxarm
> Subject: RE: [PATCH v7 0/3] make dma_alloc_coherent NUMA-aware by
> per-NUMA CMA
>
>
>
> >
.com; catalin.mari...@arm.com;
> a...@linux-foundation.org
> Cc: iommu@lists.linux-foundation.org; linux-arm-ker...@lists.infradead.org;
> linux-ker...@vger.kernel.org; Zengtao (B) ;
> huangdaode ; Linuxarm
> Subject: Re: [PATCH v7 0/3] make dma_alloc_coherent NUMA-aware by
> per-NUMA CM
Hi Barry,
Sorry for jumping in so late.
On 8/21/20 4:33 AM, Barry Song wrote:
>
> with per-numa CMA, smmu will get memory from local numa node to save command
> queues and page tables. that means dma_unmap latency will be shrunk much.
Since per-node CMA areas for hugetlb was introduced, I have
Ganapatrao Kulkarni has put some effort on making arm-smmu-v3 use local
memory to save command queues[1]. I also did similar job in patch
"iommu/arm-smmu-v3: allocate the memory of queues in local numa node"
[2] while not realizing Ganapatrao has done that before.
But it seems it is much better
