From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1SIUcw-0003xJ-Ia for garchives@archives.gentoo.org; Fri, 13 Apr 2012 00:44:38 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 1004BE0952; Fri, 13 Apr 2012 00:44:17 +0000 (UTC) Received: from smtp.gentoo.org (smtp.gentoo.org [140.211.166.183]) by pigeon.gentoo.org (Postfix) with ESMTP id 44F37E08EB for ; Fri, 13 Apr 2012 00:43:39 +0000 (UTC) Received: from vapier.localnet (localhost [127.0.0.1]) by smtp.gentoo.org (Postfix) with ESMTP id B9AAD1B401C; Fri, 13 Apr 2012 00:43:38 +0000 (UTC) From: Mike Frysinger Organization: wh0rd.org To: gentoo-dev@lists.gentoo.org Subject: Re: [gentoo-dev] Debugging a Linux kernel deadlock when doing swap on ZFS Date: Thu, 12 Apr 2012 20:44:27 -0400 User-Agent: KMail/1.13.7 (Linux/3.4.0-rc1; KDE/4.6.5; x86_64; ; ) Cc: Richard Yao References: <4F876580.3030607@cs.stonybrook.edu> In-Reply-To: <4F876580.3030607@cs.stonybrook.edu> Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-dev@lists.gentoo.org Reply-to: gentoo-dev@lists.gentoo.org MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart2505982.2IVhQUpqig"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <201204122044.28680.vapier@gentoo.org> X-Archives-Salt: 8a99f6d8-aa8e-452e-87e7-470cd7674399 X-Archives-Hash: 63c1df6871d864c6cfa14765bc8f0e66 --nextPart2505982.2IVhQUpqig Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable On Thursday 12 April 2012 19:30:08 Richard Yao wrote: > I am running Gentoo on ZFS using the kernel modules from sys-kernel/spl > and sys-fs/zfs. If I put swap on ZFS, the kernel appears to deadlock > when it tries to use it. I am having trouble getting a backtrace. >=20 > Does anyone have any suggestions on how I could debug this? networked swap has always been hairy. your best bet would be to ask the zf= s=20 guys first. otherwise, g'luck -- the mm in the kernel is bad enough withou= t=20 adding in the network and filesystem stacks. otherwise, there's quick options like enabling lockdep checking in the kern= el. =20 or the NMI watchdog. =2Dmike --nextPart2505982.2IVhQUpqig Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (GNU/Linux) iQIcBAABAgAGBQJPh3bsAAoJEEFjO5/oN/WB7BYP/jvg89qSZEMEBzi2s3F/ZS3R bJgK3+iE9bu+AuVRCRz5dZw6tTqhe65wPtiXQVZQsXa2dZSr9pVpKY6DUlTKsEDY 7qGXkR77SGibkeySdUO6YHCMdE4+lxIw/qRa9GYtHLOnNbVriRY3oUDzsYJeZ/9S LcIG3yfmo5NwNAPEsd3U48hUeESEhq9aNZ6CJYGAFXoG0wy06PzFEraHvQXIZHXs 260MSNyY5eu5sJxY+DQlnffOjmgeodyTg/b7kUFkqahPwx2TP4Da0rDvVZroM3iM ehTtHqa1+2S541QbnyG6HssiROi8YxvKMXuvhwXNbS0RXCRNI3Julfg6gis9y7WA 3fQvyNL5yChsE4qymDHgkY6S76fqDncRhk/m94VcwFG2LXIRj7f56we2sUFcknYS u9zkoHXdy/5G2uJ+l22jewp1Ezpp7vnt+f0xDrVsm9bhcGYpW/QFHFCnlYLnmX1E Ftz5mz0/ycxYX28huLSA51qd2RVyXFga97b3rBJ3UP5doQm5NGr1kQ62Xaxpk0cU cZDBylTmNRiHy56+Fryxrc/gVsk4+ymEVYmdMpm9mwqKF1NXev4pGEAQuo2zpbOD FlFisfOmXzz2v+0AtKmr+MWiak4hdIX0fQ6tNwFZYJSorgwHoDcV/vI41ySSqrmx AZl9tkaAbtx238DX+Eip =PG5w -----END PGP SIGNATURE----- --nextPart2505982.2IVhQUpqig--