linux-kernel - Re: [PATCH kernel] x86/swiotlb/amd: Half the size if allocation failed

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Date:   Sun, 30 Oct 2022 09:05:40 +0100
From:   Christoph Hellwig <hch@....de>
To:     Alexey Kardashevskiy <aik@....com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        iommu@...ts.linux.dev, Ashish Kalra <ashish.kalra@....com>,
        Pankaj Gupta <pankaj.gupta@....com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Robin Murphy <robin.murphy@....com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Christoph Hellwig <hch@....de>
Subject: Re: [PATCH kernel] x86/swiotlb/amd: Half the size if allocation
 failed

The subject looks wrong - this just touches the swiotlb code, and
nothing x86 or AMD specific.

The code flow now looks a little confusing.  Can yu just add a little
swiotlb_memblock_alloc helper that does the two variants of memblock
allocation and remap, so that we can keep a simply
loop around them in the caller?