From owner-freebsd-hackers@freebsd.org Tue Nov 29 12:33:46 2016 Return-Path: Delivered-To: freebsd-hackers@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 3E7F6C59BDA for ; Tue, 29 Nov 2016 12:33:46 +0000 (UTC) (envelope-from freebsd-listen@fabiankeil.de) Received: from smtprelay01.ispgateway.de (smtprelay01.ispgateway.de [80.67.31.28]) (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 0312D1F91 for ; Tue, 29 Nov 2016 12:33:45 +0000 (UTC) (envelope-from freebsd-listen@fabiankeil.de) Received: from [78.35.129.216] (helo=fabiankeil.de) by smtprelay01.ispgateway.de with esmtpsa (TLSv1.2:AES256-GCM-SHA384:256) (Exim 4.84) (envelope-from ) id 1cBhLw-0002pc-Mu; Tue, 29 Nov 2016 13:17:40 +0100 Date: Tue, 29 Nov 2016 13:17:38 +0100 From: Fabian Keil To: David Cross Cc: freebsd-hackers@freebsd.org Subject: Re: FreeBSD 11 i386 disk deadlock (I think) (now with reproduction steps!) Message-ID: <20161129131738.792efbd1@fabiankeil.de> In-Reply-To: References: <20161128041847.GA65249@charmander> <20161128120046.GP54029@kib.kiev.ua> <20161128144135.10f93205@fabiankeil.de> <20161128160311.GQ54029@kib.kiev.ua> <20161128162240.GM99742@zxy.spb.ru> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; boundary="Sig_/ybg1f4osQaFWxurSirOYGci"; protocol="application/pgp-signature" X-Df-Sender: Nzc1MDY3 X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 29 Nov 2016 12:33:46 -0000 --Sig_/ybg1f4osQaFWxurSirOYGci Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable David Cross wrote: > I wouldn't call this a 'workaround', but the right answer. Something in > the disk io path shouldn't be allocating memory out of the pool that can > cause paging (since any of that could be IN the path for paging). It was > what I assumed Fabian's proposed patch was. That's indeed what the patch does (for geli). Fabian --Sig_/ybg1f4osQaFWxurSirOYGci Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEARECAAYFAlg9ceMACgkQBYqIVf93VJ1m+gCeJBc5TxgeujQCVeP9446GMwmJ XN8AoMD2Bv6VL/mhIPTETKcYz/iFtUCi =r5ed -----END PGP SIGNATURE----- --Sig_/ybg1f4osQaFWxurSirOYGci--