From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by finch.gentoo.org (Postfix) with ESMTPS id 67CC81396D0 for ; Mon, 21 Aug 2017 10:36:02 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 2083B1FC090; Mon, 21 Aug 2017 10:35:55 +0000 (UTC) Received: from ra.horus-it.com (ra.horus-it.com [IPv6:2a01:4f8:10b:202e::2]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by pigeon.gentoo.org (Postfix) with ESMTPS id B692E1FC049 for ; Mon, 21 Aug 2017 10:35:52 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by ra.horus-it.com (Postfix) with ESMTP id 4CA6C48C1777 for ; Mon, 21 Aug 2017 12:35:52 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=monksofcool.net; h=content-transfer-encoding:content-language:content-type :content-type:in-reply-to:mime-version:user-agent:date:date :message-id:from:from:references:subject:subject; s=alpha; t= 1503311748; x=1505903749; bh=BcrW1WzPY0SXJgUEmiDVizn9Ye6/kQZvlzV Mx5nJRj4=; b=VonNx3MS1c+MTO5WZ4ZhZJtTfs3MT6qOkJkLAV8zOdbYQUjlS1p KwcMo9BnoaCFfEU56IsX2InpTyq5lFV4c8eN1ZzqSm/Bc1N2p7QlG+tOwkN4YW+V 06SVZtDGMB650p3zrIIK+6XXK38ZlQoPD9t2/MmKSWu5wGhkrQV3hdPuVTBpj3xi DteBmIhlSJMYzaCm5EMnZwF/3xr3dps9DMRGfOGxDfLgkduGM0fMzA97/hssJZhs nRmtt8U7Qbymjl7kBl5/Wpap6VraxGh0nrfCaKXApf1BBSZMG2+8TGoVwGOnrl7n SJZPgprkMYz+UUk225BjNqtjBLVLedl9++A== X-Virus-Scanned: at horus-it.com Subject: Re: [gentoo-user] Nameserver lookups fail on virtual server after Kernel upgrade from version 4.9 to 4.12 To: gentoo-user@lists.gentoo.org References: <36647422-6e40-b12f-fa32-a5bef8d68f32@monksofcool.net> <3B2D3BB9-2EBD-4C29-9168-18903E5176DF@stfw.net> From: Ralph Seichter Message-ID: <65c008e3-169d-2d9a-787a-a91878f9e7f0@monksofcool.net> Date: Mon, 21 Aug 2017 12:35:44 +0200 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 In-Reply-To: <3B2D3BB9-2EBD-4C29-9168-18903E5176DF@stfw.net> Content-Type: text/plain; charset=utf-8 Content-Language: en-GB Content-Transfer-Encoding: 7bit X-Archives-Salt: 406a1564-8af9-4a19-a0f5-b1251419d901 X-Archives-Hash: 5f4f832a2742c9067f418b512cc48238 On 21.08.2017 08:08, Neil Bothwick wrote: > Ah, so silentoldconfig is effectively the same as old config. Silentoldconfig is quite a useful make target, since it only asks about newly introduced kernel options. > Does your old kernel still work ad before? Just wondering if another > update could have caused this. Both affected virtual servers run fine when I boot kernel 4.9.34 while leaving everything else unchanged. I'm currently comparing .config files for kernel versions 4.9.34 and 4.12.5 again, but nothing catches my eye. As for the symptoms, I wonder: Outbound nameserver access is seizing up completely, while I can still access the servers via SSH at the same time. Could it be something that kills UDP after the servers are active for a while, but leaves TCP alive? -Ralph