netdev - Re: [PATCH bpf] bpf: Fix release of page_pool in BPF_PROG

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Date:   Mon, 11 Apr 2022 15:40:11 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Toke Høiland-Jørgensen <toke@...hat.com>@ci.codeaurora.org
Cc:     ast@...nel.org, daniel@...earbox.net, andrii@...nel.org,
        kafai@...com, songliubraving@...com, yhs@...com,
        john.fastabend@...il.com, kpsingh@...nel.org, davem@...emloft.net,
        kuba@...nel.org, hawk@...nel.org, freysteinn.alfredsson@....se,
        pabeni@...hat.com, netdev@...r.kernel.org, bpf@...r.kernel.org
Subject: Re: [PATCH bpf] bpf: Fix release of page_pool in BPF_PROG_RUN

Hello:

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

On Sat,  9 Apr 2022 23:30:53 +0200 you wrote:
> The live packet mode in BPF_PROG_RUN allocates a page_pool instance for
> each test run instance and uses it for the packet data. On setup it creates
> the page_pool, and calls xdp_reg_mem_model() to allow pages to be returned
> properly from the XDP data path. However, xdp_reg_mem_model() also raises
> the reference count of the page_pool itself, so the single
> page_pool_destroy() count on teardown was not enough to actually release
> the pool. To fix this, add an additional xdp_unreg_mem_model() call on
> teardown.
> 
> [...]

Here is the summary with links:
  - [bpf] bpf: Fix release of page_pool in BPF_PROG_RUN
    https://git.kernel.org/bpf/bpf/c/425d239379db

You are awesome, thank you!
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