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 07A69824B7; Mon, 15 Apr 2024 18:07:53 +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=1713204474; cv=none; b=R7mMqbrqy6zS6zebTehbcqulv9HJ0AFm/2SKxrpJXdLlZYa+mjxGykQiBpdpWvZ4pGhweJj+5b1q1+Ni6of8H6cwpy8oAXmAqrjSg1mqk6XYAdMDuo/HlzwqUlfYkuDpXIHj8Vqg5EjsKlQnYh0rUfO6AAIzL8TWiwexytTyeGA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713204474; c=relaxed/simple; bh=g9JAiRPeZH9fD6H2JsrciNypysCBGBFSrE+abKZyCfE=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=dnhkLD22DW17YagNSPNDrIMfXJXHDmDjiN0AP4QGOPGGkVXSvxFSN4OPLcA9fC19cVrTs/UQKOQIImRhk3WhK31WnRDhn6XmU/lrHteAWuHzeUhxRqM26cOTqv2fVYQlHKr580z0imuuxd+4m075uMEFIa6r4WHBfH/XMw2chIA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=KipisuSt; 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="KipisuSt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 56414C113CC; Mon, 15 Apr 2024 18:07:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1713204473; bh=g9JAiRPeZH9fD6H2JsrciNypysCBGBFSrE+abKZyCfE=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=KipisuSti1Ah5JA0E6G4t16RayldXKA/tIPhvE936LFJgM54SFDlWzorRdoqNPoP0 anzlGrRUnsQ1ykCW4+DmQFnlNeAcqxb0VYs6SLibXGrPiYZc4ZkNqGvnYGPojuHvxX ZhYNV6+qY4+c/v+2OC5oeM7oRJx3cBW9xGar3eGE5/fd32Y0CVz5Eh6qyOTUCtfSsr +7pOKYKv8WQPB/+mRcMH+GxOSe/0//MQYjaZihsC6i/O36S4cqbG/lqqUr4QvOdZ2w 3mBXRZF0xfkRjexMBibLgfpyEWXpB7FsNDyuNKoZvo7W+Hbjv5i8Yv97Iy/geJaj0H xf0sCKKxtY6VA== Date: Mon, 15 Apr 2024 11:07:52 -0700 From: Jakub Kicinski To: Zheng Li Cc: netdev@vger.kernel.org, bpf@vger.kernel.org, davem@davemloft.net, jmorris@namei.org, James.Z.Li@Dell.com Subject: Re: [PATCH] neighbour: guarantee the localhost connections be established successfully even the ARP table is full Message-ID: <20240415110752.30f6733b@kernel.org> In-Reply-To: <20240412122538.51-1-lizheng043@gmail.com> References: <20240412122538.51-1-lizheng043@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Fri, 12 Apr 2024 20:25:38 +0800 Zheng Li wrote: > Inter-process communication on localhost should be established successfully even the ARP table is full, > many processes on server machine use the localhost to communicate such as command-line interface (CLI), > servers hope all CLI commands can be executed successfully even the arp table is full. > Right now CLI commands got timeout when the arp table is full. > Set the parameter of exempt_from_gc to be true for LOOPBACK net device to > keep localhost neigh in arp table, not removed by gc. > > the steps of reproduced: > server with "gc_thresh3 = 1024" setting, ping server from more than 1024 IPv4 addresses, > run "ssh localhost" on console interface, then the command will get timeout. Please repost this and CC appropriate maintainers. scripts/get_maintainer doesn't bite. -- pw-bot: cr