linux-kernel - Re: [PATCH net] net: fec: Use page_pool_put_full

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Message-Id: <167447101529.31244.5946300408564570569.git-patchwork-notify@kernel.org>
Date:   Mon, 23 Jan 2023 10:50:15 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Wei Fang <wei.fang@....com>
Cc:     shenwei.wang@....com, xiaoning.wang@....com, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        netdev@...r.kernel.org, linux-imx@....com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net] net: fec: Use page_pool_put_full_page when freeing rx
 buffers

Hello:

This patch was applied to netdev/net.git (master)
by David S. Miller <davem@...emloft.net>:

On Thu, 19 Jan 2023 12:37:47 +0800 you wrote:
> From: Wei Fang <wei.fang@....com>
> 
> The page_pool_release_page was used when freeing rx buffers, and this
> function just unmaps the page (if mapped) and does not recycle the page.
> So after hundreds of down/up the eth0, the system will out of memory.
> For more details, please refer to the following reproduce steps and
> bug logs. To solve this issue and refer to the doc of page pool, the
> page_pool_put_full_page should be used to replace page_pool_release_page.
> Because this API will try to recycle the page if the page refcnt equal to
> 1. After testing 20000 times, the issue can not be reproduced anymore
> (about testing 391 times the issue will occur on i.MX8MN-EVK before).
> 
> [...]

Here is the summary with links:
  - [net] net: fec: Use page_pool_put_full_page when freeing rx buffers
    https://git.kernel.org/netdev/net/c/e38553bdc377

You are awesome, thank you!
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