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Re: [PATCH RFC v1 2/6] swiotlb: convert variables to arrays
- To: Dongli Zhang <dongli.zhang@xxxxxxxxxx>
- From: Christoph Hellwig <hch@xxxxxx>
- Date: Thu, 4 Feb 2021 08:29:47 +0100
- Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx, intel-gfx@xxxxxxxxxxxxxxxxxxxxx, iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx, linux-mips@xxxxxxxxxxxxxxx, linux-mmc@xxxxxxxxxxxxxxx, linux-pci@xxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, nouveau@xxxxxxxxxxxxxxxxxxxxx, x86@xxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, adrian.hunter@xxxxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, benh@xxxxxxxxxxxxxxxxxxx, bskeggs@xxxxxxxxxx, bhelgaas@xxxxxxxxxx, bp@xxxxxxxxx, boris.ostrovsky@xxxxxxxxxx, hch@xxxxxx, chris@xxxxxxxxxxxxxxxxxx, daniel@xxxxxxxx, airlied@xxxxxxxx, hpa@xxxxxxxxx, mingo@xxxxxxxxxx, mingo@xxxxxxxxxx, jani.nikula@xxxxxxxxxxxxxxx, joonas.lahtinen@xxxxxxxxxxxxxxx, jgross@xxxxxxxx, konrad.wilk@xxxxxxxxxx, m.szyprowski@xxxxxxxxxxx, matthew.auld@xxxxxxxxx, mpe@xxxxxxxxxxxxxx, rppt@xxxxxxxxxx, paulus@xxxxxxxxx, peterz@xxxxxxxxxxxxx, robin.murphy@xxxxxxx, rodrigo.vivi@xxxxxxxxx, sstabellini@xxxxxxxxxx, bauerman@xxxxxxxxxxxxx, tsbogend@xxxxxxxxxxxxxxxx, tglx@xxxxxxxxxxxxx, ulf.hansson@xxxxxxxxxx, joe.jin@xxxxxxxxxx, thomas.lendacky@xxxxxxx, Claire Chang <tientzu@xxxxxxxxxxxx>
- Delivery-date: Thu, 04 Feb 2021 07:30:04 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Wed, Feb 03, 2021 at 03:37:05PM -0800, Dongli Zhang wrote:
> This patch converts several swiotlb related variables to arrays, in
> order to maintain stat/status for different swiotlb buffers. Here are
> variables involved:
>
> - io_tlb_start and io_tlb_end
> - io_tlb_nslabs and io_tlb_used
> - io_tlb_list
> - io_tlb_index
> - max_segment
> - io_tlb_orig_addr
> - no_iotlb_memory
>
> There is no functional change and this is to prepare to enable 64-bit
> swiotlb.
Claire Chang (on Cc) already posted a patch like this a month ago,
which looks much better because it actually uses a struct instead
of all the random variables.
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