From owner-freebsd-stable@FreeBSD.ORG Thu Mar 29 07:55:57 2012 Return-Path: Delivered-To: stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 503581065674; Thu, 29 Mar 2012 07:55:57 +0000 (UTC) (envelope-from c.kworr@gmail.com) Received: from mail-ey0-f182.google.com (mail-ey0-f182.google.com [209.85.215.182]) by mx1.freebsd.org (Postfix) with ESMTP id A80418FC1A; Thu, 29 Mar 2012 07:55:56 +0000 (UTC) Received: by eaaf13 with SMTP id f13so909255eaa.13 for ; Thu, 29 Mar 2012 00:55:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; bh=fzvAGkzypgfbWHCR1/AxaSxH2xsQPjbNcqr/YtFZHH0=; b=OqSU3H27BaJ35K3pPAOEz+5B75IdFXlmynPAiXJm6scmCX4fNaaL1Hmvj4KtNydLH9 Q1xNXfO6fuzqTIP2N/nlr96bkP5kBp8dHqjuAfIkgrAfahgKedMK4xXKdW2CG1WQfhzi QxqY+bLVFkKkUuHpQeKEyFrgFUTKo/xBt6EggBQJQdSZ9X7LomKssuggVrTbEFVSif8J OYaZLC37Tz8WBh+hIJVXN1FqJuvPHqyKuoffzmGnFqAvmew1stGZPk0Z6JQpPXL0nOYK PkygQHEPNjlXyiorIj1TEZySpP1nl4rEyz9DQlPH7XYqdLHg8YFR+jHmaQI8a9VtO8Ws NIeQ== Received: by 10.180.102.100 with SMTP id fn4mr3149719wib.1.1333007755493; Thu, 29 Mar 2012 00:55:55 -0700 (PDT) Received: from green.tandem.local (39-112-132-95.pool.ukrtel.net. [95.132.112.39]) by mx.google.com with ESMTPS id ff9sm64828212wib.2.2012.03.29.00.55.53 (version=SSLv3 cipher=OTHER); Thu, 29 Mar 2012 00:55:54 -0700 (PDT) Message-ID: <4F741588.9000202@gmail.com> Date: Thu, 29 Mar 2012 10:55:52 +0300 From: Volodymyr Kostyrko User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:11.0) Gecko/20120315 Firefox/11.0 SeaMonkey/2.8 MIME-Version: 1.0 To: Andriy Gapon References: <4F71E14A.8010605@gmail.com> <4F71E482.7060509@FreeBSD.org> In-Reply-To: <4F71E482.7060509@FreeBSD.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: stable@FreeBSD.org Subject: Re: trap 12 on 9.0 when memcache gets some load [resolved] ZERO_COPY trap X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 29 Mar 2012 07:55:57 -0000 Andriy Gapon wrote: > on 27/03/2012 18:48 Volodymyr Kostyrko said the following: >> Hi all. >> >> I'm just puzzled with this. At first I though this happens because of some memory >> problems. But now project was moved to another server with some other brands for >> motherboard/memory and different cpu's. And still once in an hour this happens again: >> >> == screenshot >> current_process = 1935 (memcached) >> trap number = 12 >> panic: page fault >> cpuid = 2 >> KDB: stack backtrace: >> #0 0xffffffff8038ab38 at kdb_backtrace+0x58 >> #1 0xffffffff80358f80 at panic+0x190 >> #2 0xffffffff80567b15 at trap_fatal+0x395 >> #3 0xffffffff80567ce9 at trap_pfault+0x1c9 >> #4 0xffffffff80567536 at trap+0x3a6 >> #5 0xffffffff80552603 at calltrap+0x8 >> #6 0xffffffff803b2c90 at socow_setup+0xd0 > > I think that zero-copy sockets are not regarded as a reliable feature. > Not an expert, just my two cents. Disabling zero_zopy seems to work as server still runs after 12 hours. Before that one hour was enough to trigger error. kern.ipc.zero_copy.receive: 0 kern.ipc.zero_copy.send: 0 -- Sphinx of black quartz judge my vow.