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 7FFB3192B75; Tue, 31 Mar 2026 02:00:22 +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=1774922422; cv=none; b=E5Tlt7Xz/OH7swtg3Ew/pu7cc6eoKpiI9eRIrc/t5+7T2KFl5gKjqi/tWO6dVFLVDQJouE6rfA4Z+K5iwerH3pSNibM5ec7MpIaXT2FxbDf3w6qfAo50toMMrvYRwpwpaRUTXUbPiO4fmt77nJtdRhaSFZPOw7LUl6C8se2oL5A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774922422; c=relaxed/simple; bh=+5jjSJHEn37i/yEgwa3lh3t5HW15dgu7YIUh1RVLGyY=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=E+bqi2R4+4mEZIzBvKfmcofDu308P+BD7eiGEML1aDycMcuK6xKn21sl6YGmx8wZ7Itb5ReBu5asOWip9Wa1l9Rm7kN+qgKlhxE8CLmVTNoQH0nmVGpYthtE34yXOBVx6TBLbRgzbexGVs+F5xqSH7PBsb1dBDihBUxmqmAMZZw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=rJ21FhyG; 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="rJ21FhyG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 23E1AC4CEF7; Tue, 31 Mar 2026 02:00:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1774922422; bh=+5jjSJHEn37i/yEgwa3lh3t5HW15dgu7YIUh1RVLGyY=; h=Subject:From:Date:References:In-Reply-To:To:Cc:From; b=rJ21FhyGxiP1RQpwME28EVmDAvHYdGE1pX9VrEOSCNj/qUPZFH1yC8snI6l2Nr/gw hULQa+t1BOWucMC8rB951YMW4dHkyLmAOaIiju+c9nlEdkV7X2ttu8FZu+iMxHsj0e gLEDKJyuBvsEU2jdBvzUknjaAIB2T9dEP+yIIQpzDcT+o7E+ItlXwCwpmeCpVzfv0w ognmq4Xet0GWpMu/Xsxb14IjcUZ7ZThLotwqF6WAxymUCjImvPpjRnyTGwocC84Ip7 kieJeAiTPt+V3H8vG9CReG5cHAdfHrN8MJUc8jdpkXnL63veNls08lLZtQQh/3PgKU cqJ9G5MEK0zZQ== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id 3FF39392FF99; Tue, 31 Mar 2026 02:00:07 +0000 (UTC) Content-Type: text/plain; charset="utf-8" Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH net-next] FDDI: defxx: Rate-limit memory allocation errors From: patchwork-bot+netdevbpf@kernel.org Message-Id: <177492240604.2055536.1918723401028996049.git-patchwork-notify@kernel.org> Date: Tue, 31 Mar 2026 02:00:06 +0000 References: In-Reply-To: To: Maciej W. Rozycki Cc: andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Hello: This patch was applied to netdev/net-next.git (main) by Jakub Kicinski : On Sun, 29 Mar 2026 13:32:25 +0100 (BST) you wrote: > Prevent the system from becoming unstable or unusable due to a flood of > memory allocation error messages under memory pressure, e.g.: > > [...] > fddi0: Could not allocate receive buffer. Dropping packet. > fddi0: Could not allocate receive buffer. Dropping packet. > fddi0: Could not allocate receive buffer. Dropping packet. > fddi0: Could not allocate receive buffer. Dropping packet. > rcu: INFO: rcu_sched self-detected stall on CPU > rcu: 0-...!: (332 ticks this GP) idle=255c/1/0x40000000 softirq=16420123/16420123 fqs=0 > rcu: (t=2103 jiffies g=35680089 q=4 ncpus=1) > rcu: rcu_sched kthread timer wakeup didn't happen for 2102 jiffies! g35680089 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 > rcu: Possible timer handling issue on cpu=0 timer-softirq=12779658 > rcu: rcu_sched kthread starved for 2103 jiffies! g35680089 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 > rcu: Unless rcu_sched kthread gets sufficient CPU time, OOM is now expected behavior. > rcu: RCU grace-period kthread stack dump: > task:rcu_sched state:I stack:0 pid:14 tgid:14 ppid:2 flags:0x00004000 > Call Trace: > __schedule+0x258/0x580 > schedule+0x19/0xa0 > schedule_timeout+0x4a/0xb0 > ? hrtimers_cpu_dying+0x1b0/0x1b0 > rcu_gp_fqs_loop+0xb1/0x450 > rcu_gp_kthread+0x9d/0x130 > kthread+0xb2/0xe0 > ? rcu_gp_init+0x4a0/0x4a0 > ? kthread_park+0x90/0x90 > ret_from_fork+0x2d/0x50 > ? kthread_park+0x90/0x90 > ret_from_fork_asm+0x12/0x20 > entry_INT80_32+0x10d/0x10d > CPU: 0 UID: 500 PID: 21895 Comm: 31370.exe Not tainted 6.13.0-dirty #2 > > [...] Here is the summary with links: - [net-next] FDDI: defxx: Rate-limit memory allocation errors https://git.kernel.org/netdev/net-next/c/7fae6616704a You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html