linux-kernel - Re: [PATCH net v3 1/1] xsk: clear page contiguity bit when unmapping pool

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Message-Id: <165645001434.24528.16734258366303906334.git-patchwork-notify@kernel.org>
Date:   Tue, 28 Jun 2022 21:00:14 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Ivan Malov <ivan.malov@...etlabs.ru>
Cc:     magnus.karlsson@...el.com, bjorn.topel@...el.com,
        netdev@...r.kernel.org, andrew.rybchenko@...etlabs.ru,
        bpf@...r.kernel.org, linux-kernel@...r.kernel.org,
        bjorn@...nel.org, maciej.fijalkowski@...el.com,
        jonathan.lemon@...il.com, davem@...emloft.net, edumazet@...gle.com,
        kuba@...nel.org, pabeni@...hat.com, ast@...nel.org,
        daniel@...earbox.net, hawk@...nel.org, john.fastabend@...il.com,
        maximmi@...lanox.com
Subject: Re: [PATCH net v3 1/1] xsk: clear page contiguity bit when unmapping pool

Hello:

This patch was applied to bpf/bpf.git (master)
by Daniel Borkmann <daniel@...earbox.net>:

On Tue, 28 Jun 2022 12:18:48 +0300 you wrote:
> When a XSK pool gets mapped, xp_check_dma_contiguity() adds bit 0x1
> to pages' DMA addresses that go in ascending order and at 4K stride.
> The problem is that the bit does not get cleared before doing unmap.
> As a result, a lot of warnings from iommu_dma_unmap_page() are seen
> in dmesg, which indicates that lookups by iommu_iova_to_phys() fail.
> 
> Fixes: 2b43470add8c ("xsk: Introduce AF_XDP buffer allocation API")
> Signed-off-by: Ivan Malov <ivan.malov@...etlabs.ru>
> 
> [...]

Here is the summary with links:
  - [net,v3,1/1] xsk: clear page contiguity bit when unmapping pool
    https://git.kernel.org/bpf/bpf/c/512d1999b8e9

You are awesome, thank you!
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