From owner-freebsd-stable@freebsd.org Fri Sep 16 20:31:01 2016 Return-Path: Delivered-To: freebsd-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id C4542BDD1B4 for ; Fri, 16 Sep 2016 20:31:01 +0000 (UTC) (envelope-from slw@zxy.spb.ru) Received: from zxy.spb.ru (zxy.spb.ru [195.70.199.98]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 7F6A6319; Fri, 16 Sep 2016 20:31:01 +0000 (UTC) (envelope-from slw@zxy.spb.ru) Received: from slw by zxy.spb.ru with local (Exim 4.86 (FreeBSD)) (envelope-from ) id 1bkzmj-0003U4-7l; Fri, 16 Sep 2016 23:30:57 +0300 Date: Fri, 16 Sep 2016 23:30:57 +0300 From: Slawa Olhovchenkov To: hiren panchasara Cc: jch@FreeBSD.org, Konstantin Belousov , freebsd-stable@FreeBSD.org Subject: Re: 11.0 stuck on high network load Message-ID: <20160916203057.GH2840@zxy.spb.ru> References: <20160904215739.GC22212@zxy.spb.ru> <20160905014612.GA42393@strugglingcoder.info> <20160914213503.GJ2840@zxy.spb.ru> <20160915085938.GN38409@kib.kiev.ua> <20160915090633.GS2840@zxy.spb.ru> <20160916181839.GC2960@zxy.spb.ru> <20160916183053.GL9397@strugglingcoder.info> <20160916190330.GG2840@zxy.spb.ru> <20160916191155.GM9397@strugglingcoder.info> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160916191155.GM9397@strugglingcoder.info> User-Agent: Mutt/1.5.24 (2015-08-30) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: slw@zxy.spb.ru X-SA-Exim-Scanned: No (on zxy.spb.ru); SAEximRunCond expanded to false X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 16 Sep 2016 20:31:01 -0000 On Fri, Sep 16, 2016 at 12:11:55PM -0700, hiren panchasara wrote: > > As I suspected, this looks like a hang trying to lock V_tcbinfo. > > I'm ccing Julien here who worked on WLOCK -> RLOCK transition to improve > performance for short-lived connections. I am not too sure if thats the > problem but looks in similar area so he may be able to provide some > insights. No, this is other case. In may case at this time no network traffic more then hour. This is some sore of deadlock or like.