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From:   Will Deacon <will@kernel.org>
To:     Dawei Li <set_pte_at@outlook.com>, joro@8bytes.org,
        robin.murphy@arm.com
Cc:     catalin.marinas@arm.com, kernel-team@android.com,
        Will Deacon <will@kernel.org>,
        linux-arm-kernel@lists.infradead.org, iommu@lists.linux.dev,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH] iommu/arm-smmu-v3: Change vmid alloc strategy from bitmap to ida
Date:   Tue,  1 Aug 2023 21:41:47 +0100
Message-Id: <169087904450.1290857.11726985177314533259.b4-ty@kernel.org>
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On Sun, 16 Jul 2023 00:16:21 +0800, Dawei Li wrote:
> For current implementation of vmid allocation of arm smmu-v3, a per-smmu
> devide bitmap of 64K bits(8K bytes) is allocated on behalf of possible VMID
> range, which is two pages for some architectures. Besides that, its memory
> consumption is 'static', despite of how many VMIDs are allocated actually.
> 
> That's memory inefficient and lack of scalability.
> 
> [...]

Applied to will (for-joerg/arm-smmu/updates), thanks!

[1/1] iommu/arm-smmu-v3: Change vmid alloc strategy from bitmap to ida
      https://git.kernel.org/will/c/1672730cffaf

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev