linux-kernel - Re: [PATCH] bpf: use raw_spinlock

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Message-Id: 
 <172725843003.522662.2025610414872346543.git-patchwork-notify@kernel.org>
Date: Wed, 25 Sep 2024 10:00:30 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Wander Lairson Costa <wander@...hat.com>
Cc: andrii@...nel.org, ast@...nel.org, daniel@...earbox.net,
 martin.lau@...ux.dev, eddyz87@...il.com, song@...nel.org,
 yonghong.song@...ux.dev, john.fastabend@...il.com, kpsingh@...nel.org,
 sdf@...ichev.me, haoluo@...gle.com, jolsa@...nel.org, bpf@...r.kernel.org,
 linux-kernel@...r.kernel.org, wander.lairson@...il.com, bgrech@...hat.com
Subject: Re: [PATCH] bpf: use raw_spinlock_t in ringbuf

Hello:

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

On Fri, 20 Sep 2024 16:06:59 -0300 you wrote:
> From: Wander Lairson Costa <wander.lairson@...il.com>
> 
> The function __bpf_ringbuf_reserve is invoked from a tracepoint, which
> disables preemption. Using spinlock_t in this context can lead to a
> "sleep in atomic" warning in the RT variant. This issue is illustrated
> in the example below:
> 
> [...]

Here is the summary with links:
  - bpf: use raw_spinlock_t in ringbuf
    https://git.kernel.org/bpf/bpf/c/8b62645b09f8

You are awesome, thank you!
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