From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 322581EB36; Wed, 25 Sep 2024 10:00:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727258428; cv=none; b=eUrTnaszHXtZVk+iwxe6k9x/1CGS5GlOEa+4LFRgxNdwGRAyXmbLGY3Hk40YhqS9PoG/+sv7rWyyfbVOsKIuyrf/RdkKSQhSwE45v+EWfO7XUmPGN2QDhuSGZkHoHqxipPW5MYdOfMwFyAEaKQlA43nKsyMzW5CoAzq9r7o640k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727258428; c=relaxed/simple; bh=5asKXx8rvc/j8RHJ0ZLPPfaRDR6OCWKdjW8K3o628iw=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=nT2D6E5eEbcGQNq7nP/WSHVI94Gu7KHOAo+m9ppN9Lv3sbfeVISguy6q59UCmr9++jck+ahbkiqgViO58tgz92wW8VRy01iNGpEJI0EdP8smhrgyvgGxGXGG2AxQTpXz3QVx21eiGYL1giqZrmO7rOIa3iQn/wiHiLUg1ji7w+o= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=VgB0ykHw; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="VgB0ykHw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 93E46C4CEC3; Wed, 25 Sep 2024 10:00:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1727258427; bh=5asKXx8rvc/j8RHJ0ZLPPfaRDR6OCWKdjW8K3o628iw=; h=Subject:From:Date:References:In-Reply-To:To:Cc:From; b=VgB0ykHwDGc9YIKdIlQb305W/sNlM3q3qYn1spD78g/VDpGprqo3afz5Ut8jX+IjQ 8+/SnyBatpsh9ptlwQ1h1x/p0qlbFQyG8rskGh9uAxUN6ObvzgikHx5LEfdUBuR0rq ObUl/4nejbq3gvkiR3Nn+75IJsq5a84YMGgevVp84BbwdHLV5UmrPeWwo5U3QcJyU1 dNpPF4mRf7kurvYClbEQl/bes/QF3KCXb0uSapYBktVa3qovHgbmLwKFqYJbsc1Nnn p5DWc7x2VUhchRt6oWnFVlSzbKg/hvpDpWLOBYcZOcbGoLgxB6x7fVsUkq8wClceFw ai15PvIZkxvlg== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id 3414A3809A8F; Wed, 25 Sep 2024 10:00:31 +0000 (UTC) Content-Type: text/plain; charset="utf-8" Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH] bpf: use raw_spinlock_t in ringbuf From: patchwork-bot+netdevbpf@kernel.org Message-Id: <172725843003.522662.2025610414872346543.git-patchwork-notify@kernel.org> Date: Wed, 25 Sep 2024 10:00:30 +0000 References: <20240920190700.617253-1-wander@redhat.com> In-Reply-To: <20240920190700.617253-1-wander@redhat.com> To: Wander Lairson Costa Cc: andrii@kernel.org, ast@kernel.org, daniel@iogearbox.net, martin.lau@linux.dev, eddyz87@gmail.com, song@kernel.org, yonghong.song@linux.dev, john.fastabend@gmail.com, kpsingh@kernel.org, sdf@fomichev.me, haoluo@google.com, jolsa@kernel.org, bpf@vger.kernel.org, linux-kernel@vger.kernel.org, wander.lairson@gmail.com, bgrech@redhat.com Hello: This patch was applied to bpf/bpf.git (master) by Daniel Borkmann : On Fri, 20 Sep 2024 16:06:59 -0300 you wrote: > From: Wander Lairson Costa > > 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! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html