netdev - Re: [PATCH net-next v4] net: ip: avoid OOM kills with large UDP sends over loopback

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Date:   Thu, 24 Jun 2021 18:20:03 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     davem@...emloft.net, netdev@...r.kernel.org, willemb@...gle.com,
        eric.dumazet@...il.com, dsahern@...il.com, yoshfuji@...ux-ipv6.org,
        brouer@...hat.com, dsj@...com
Subject: Re: [PATCH net-next v4] net: ip: avoid OOM kills with large UDP sends
 over loopback

Hello:

This patch was applied to netdev/net-next.git (refs/heads/master):

On Wed, 23 Jun 2021 14:44:38 -0700 you wrote:
> Dave observed number of machines hitting OOM on the UDP send
> path. The workload seems to be sending large UDP packets over
> loopback. Since loopback has MTU of 64k kernel will try to
> allocate an skb with up to 64k of head space. This has a good
> chance of failing under memory pressure. What's worse if
> the message length is <32k the allocation may trigger an
> OOM killer.
> 
> [...]

Here is the summary with links:
  - [net-next,v4] net: ip: avoid OOM kills with large UDP sends over loopback
    https://git.kernel.org/netdev/net-next/c/6d123b81ac61

You are awesome, thank you!
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