From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794544806; b=x9MUgtoOqtRFbg3EulerH6NyJ6MQL+Mib9tRlro7DaF9S2vAkbW3q8KeEJAy1Jk01OKY j433iVndiGNLk92UCGvADrNsuITxcHnxwtL/mEJSPDiLhZJlrJ+kA1GnBei8jbPUy5E5q lkyRojoALtfHKgP2+kaZtsQRBgbszl69qufcdftr/IrhZ8aekG6rhxqVrzTieoKQsG+FN x7l5MA5pyZc85v4c3bcRSSIbwOoTnBTCMPwbNxKJ3tmbd3iTUNrbdXdVEK020aaRMgFnO XBkCbbMkbq4iCFjDNj2uGE6XL3obbkPGLA3WoVNf0AfKGiaU5rjP6SMUcV3uV1OoMCQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794544806; h=Received:DKIM-Signature:Received:Content-Type:MIME-Version: Content-Transfer-Encoding:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; bh=qV1kmvem6IC73sZN0FEl20QggbxcQVRAZqpQxZm5/u8=; b=M5sEonL1MCc+8ZZ2XGejBNmhwInysRS0ZTRfk8gmmsfJML+Cj8/nCLvlm3pAdp1m5tFk Du3vS+ZY6Nq1TlRI+Pki2ubLxqFUzg9cr6+RO/GKmkdHHQXJHbw/r0IuD7F3uRScrmjos 9/JpfwiLT9CshUT4edMS4OHodYyZkGCQVinU4IPecvS2KN/ZtCxC+a4JN6XMbVeXy8mA1 3OZRvtV9IC8JtmMduagJLM70d3NAaVsshiiqVQwBoyo+g3T/jjLkyHeLHde2c68GKF39F VpSM9aNEa62d7iuFkwG0ylq4P53n9MVQDPxWI5GtHRNrkW5YFgkkPv31r8RWcbT4SzQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=SkUtjPaC; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 79E6E606A31C; Fri, 13 Nov 2026 04:40:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=SkUtjPaC Received: by smtp.kernel.org (Postfix) with ESMTPSA id 079811F000C4; Fri, 13 Nov 2026 04:40:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794544806; bh=qV1kmvem6IC73sZN0FEl20QggbxcQVRAZqpQxZm5/u8=; h=Subject:From:Date:References:In-Reply-To:To:Cc; b=SkUtjPaCxEZW4evb7KGVPjaPmMyB6TP34/VHjoi4JeC+86xb5gFB1ZNA4SUZ2RMQi Y1uZPHpZBkETz31zJ9fZVaIJSnAqJAIFCwh41zwdUS2ptwthjfh5BTedioPmntDnqM ZCUdWcjBqcPgIqqIcTMgRYpTKdYQMxmAJPE0Ypfw3+cTwDFovDvaaqflFxTwXJX1Js aAlNBrEgFEDNnnazdHYHiYscW3/w9ckp9Ixeb2piXA26spfHyGI+NdsswvWgynBPeM vn+pYJefDnli/gRuuTgdfhLJWRURZm24yuJkkT6epXWbuOhy9VwVnX43B8LHBApX+c 2UBM19aXD/Gtw== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id F14E139263A1; Fri, 13 Nov 2026 04:40:05 +0000 (UTC) Content-Type: text/plain; charset="utf-8" X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH bpf] bpf: Report RCU-tasks quiescent states in do_check() From: patchwork-bot+netdevbpf@kernel.org Message-Id: <179454480468.802512.11142215912522075935.git-patchwork-notify@kernel.org> Date: Fri, 13 Nov 2026 04:40:04 +0000 References: <20261110-bpf-verifier-rcu-tasks-qs-v1-1-99e8f798a6dc@debian.org> In-Reply-To: <20261110-bpf-verifier-rcu-tasks-qs-v1-1-99e8f798a6dc@debian.org> To: Breno Leitao Cc: ast@kernel.org, daniel@iogearbox.net, john.fastabend@gmail.com, andrii@kernel.org, eddyz87@gmail.com, memxor@gmail.com, martin.lau@linux.dev, song@kernel.org, yonghong.song@linux.dev, jolsa@kernel.org, emil@etsalapatis.com, ihor.solodrai@linux.dev, davem@davemloft.net, bpf@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@meta.com, paulmck@kernel.org Hello: This patch was applied to bpf/bpf.git (master) by Alexei Starovoitov : On Tue, 10 Nov 2026 04:18:32 -0800 you wrote: > I am seeing rcu_tasks stalls in the Meta fleet on debug kernels (KASAN, > kmemleak, lockdep), where a task loading a BPF program stays in the > verifier for over 20 minutes: > > INFO: rcu_tasks detected stalls on tasks: > 000000000cc1a43d: .. nvcsw: 4/4 holdout: 1 idle_cpu: -1/91 task:GlobalCPUThread state:R running task pid:175256 tgid:169948 ppid:1 > Call Trace: > __create_object > __kmalloc_node_track_caller_noprof > krealloc_node_align_noprof > copy_array > bpf_copy_verifier_state > bpf_split_cur_state > do_check_common > do_check_main > bpf_check > bpf_prog_load > __sys_bpf > > [...] Here is the summary with links: - [bpf] bpf: Report RCU-tasks quiescent states in do_check() https://git.kernel.org/bpf/bpf/c/7f1e33230b7c You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html