From owner-freebsd-stable@freebsd.org Fri Sep 16 21:48:50 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 1319EBDD30B for ; Fri, 16 Sep 2016 21:48:50 +0000 (UTC) (envelope-from hiren@strugglingcoder.info) Received: from mail.strugglingcoder.info (strugglingcoder.info [104.236.146.68]) by mx1.freebsd.org (Postfix) with ESMTP id 02B3CF06; Fri, 16 Sep 2016 21:48:49 +0000 (UTC) (envelope-from hiren@strugglingcoder.info) Received: from localhost (unknown [10.1.1.3]) (Authenticated sender: hiren@strugglingcoder.info) by mail.strugglingcoder.info (Postfix) with ESMTPA id 2129B17F6E; Fri, 16 Sep 2016 14:48:49 -0700 (PDT) Date: Fri, 16 Sep 2016 14:48:49 -0700 From: hiren panchasara To: Slawa Olhovchenkov Cc: Konstantin Belousov , jch@FreeBSD.org, freebsd-stable@FreeBSD.org Subject: Re: 11.0 stuck on high network load Message-ID: <20160916214849.GS9397@strugglingcoder.info> References: <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> <20160916203057.GH2840@zxy.spb.ru> <20160916214646.GR9397@strugglingcoder.info> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="uWKIjLx9zRJNHvcs" Content-Disposition: inline In-Reply-To: <20160916214646.GR9397@strugglingcoder.info> User-Agent: Mutt/1.5.23 (2014-03-12) 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 21:48:50 -0000 --uWKIjLx9zRJNHvcs Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 09/16/16 at 02:46P, hiren panchasara wrote: > On 09/16/16 at 11:30P, Slawa Olhovchenkov wrote: > > On Fri, Sep 16, 2016 at 12:11:55PM -0700, hiren panchasara wrote: > >=20 > > >=20 > > > As I suspected, this looks like a hang trying to lock V_tcbinfo. > > >=20 > > > I'm ccing Julien here who worked on WLOCK -> RLOCK transition to impr= ove > > > performance for short-lived connections. I am not too sure if thats t= he > > > problem but looks in similar area so he may be able to provide some > > > insights. > >=20 > > 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. >=20 > In my limited understanding, such deadlock like situation can occur > without traffic too. Err, I meant to say light traffic. Cheers, Hiren --uWKIjLx9zRJNHvcs Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQF8BAABCgBmBQJX3GjBXxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXRBNEUyMEZBMUQ4Nzg4RjNGMTdFNjZGMDI4 QjkyNTBFMTU2M0VERkU1AAoJEIuSUOFWPt/lp6EH/0n++W/+uIF17UNuzUwgKZ6E z6WnGI61fXbA7sEhIGcUt7O7atyrd6XDSsr/Tdh1VIdDEHIVD35q5ko3KvxP/RNW hAskDn/pBTBmhHS04WJYp9ThOz9kwnYBSbFti3Gsq9iI0qwVK6Jj79KhYChoAQbR GjRfmWna/2xwIJkILtO8+pDEJkgVZQF4xq+Tuj8MLGL4tG+MfBx5cuTe4S1etBTU yRaIRmkJW6sWRPvnlkgEJybZTzdW2jlVt9EqpGVGq6odT7Zh82vgLaXLbtLko4HH 6n6M38Tve45tYWe1a2ZY+uDlQUhPEunMKB6lColNstkBBBc0p5e6BO8uBjDF/5A= =IL0t -----END PGP SIGNATURE----- --uWKIjLx9zRJNHvcs--