From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751050AbWAYGic (ORCPT ); Wed, 25 Jan 2006 01:38:32 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751051AbWAYGic (ORCPT ); Wed, 25 Jan 2006 01:38:32 -0500 Received: from pentafluge.infradead.org ([213.146.154.40]:65195 "EHLO pentafluge.infradead.org") by vger.kernel.org with ESMTP id S1751043AbWAYGic (ORCPT ); Wed, 25 Jan 2006 01:38:32 -0500 Subject: Re: My Linux doesn't honor "kill -9"...Is it a bug or a feature? From: Arjan van de Ven To: Arijit Das Cc: linux-kernel@vger.kernel.org In-Reply-To: <7EC22963812B4F40AE780CF2F140AFE944119C@IN01WEMBX1.internal.synopsys.com> References: <7EC22963812B4F40AE780CF2F140AFE944119C@IN01WEMBX1.internal.synopsys.com> Content-Type: text/plain Date: Wed, 25 Jan 2006 07:38:28 +0100 Message-Id: <1138171108.3001.14.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 (2.2.3-2.fc4) Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2006-01-25 at 11:59 +0530, Arijit Das wrote: > My GNU/Linux system sometimes doesn't seem to honor the 'KILL' signal > which is supposed to be a sure-shot killer. -9 doesn't kill processes in "D" state. "D" state is a state where they are in the kernel, usually waiting for IO of some kind of for a semaphore. The fact that they're stuck is a kernel bug somewhere; to diagnose we (or probably your OS vendor given you're running a highly antique kernel) the output of "echo t > /proc/sysrq-trigger", and especially the part of the dump that shows the process in "D" state.