From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262083AbVBUTqh (ORCPT ); Mon, 21 Feb 2005 14:46:37 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262082AbVBUTqh (ORCPT ); Mon, 21 Feb 2005 14:46:37 -0500 Received: from turing-police.cc.vt.edu ([128.173.14.107]:47111 "EHLO turing-police.cc.vt.edu") by vger.kernel.org with ESMTP id S262085AbVBUTpu (ORCPT ); Mon, 21 Feb 2005 14:45:50 -0500 Message-Id: <200502211945.j1LJjgbZ029643@turing-police.cc.vt.edu> X-Mailer: exmh version 2.7.2 01/07/2005 with nmh-1.1-RC3 To: Anthony DiSante Cc: linux-kernel Subject: Re: uninterruptible sleep lockups In-Reply-To: Your message of "Mon, 21 Feb 2005 14:18:44 EST." <421A3414.2020508@nodivisions.com> From: Valdis.Kletnieks@vt.edu References: <421A3414.2020508@nodivisions.com> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1109015141_9072P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Date: Mon, 21 Feb 2005 14:45:42 -0500 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --==_Exmh_1109015141_9072P Content-Type: text/plain; charset=us-ascii On Mon, 21 Feb 2005 14:18:44 EST, Anthony DiSante said: > It seems like this problem is always going to exist, because some hardware > and some drivers will always be buggy. So shouldn't we have some sort of > watchdog higher up in the kernel, that watches for hung processes like this > and kills them? And said watchdog would clean up the mess, how, exactly? There's lots of sticky issues having to do with breaking locks and possibly still-pending I/O (I once had a tape drive complete an I/O 3 *days* after the request was sent - good thing no watchdog killed the process and deallocated the memory that I/O landed in ;) It's been covered before, look in the lkml archives for details. --==_Exmh_1109015141_9072P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (GNU/Linux) Comment: Exmh version 2.5 07/13/2001 iD8DBQFCGjplcC3lWbTT17ARAuI0AKC6A/ZxTvdUtjHy9LMniix2NiLjtACgjSIp roswn0PTkPJd01fSru5puno= =HbrY -----END PGP SIGNATURE----- --==_Exmh_1109015141_9072P--