From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel Machek Subject: Re: [RFC][PATCH -mm][Experimental] swsusp: freeze userspace processes first Date: Wed, 1 Feb 2006 11:55:05 +0100 Message-ID: <20060201105505.GB2879@elf.ucw.cz> References: <200602010141.53974.rjw@sisk.pl> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============21914194991421843==" Return-path: In-Reply-To: <200602010141.53974.rjw@sisk.pl> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-pm-bounces@lists.osdl.org Errors-To: linux-pm-bounces@lists.osdl.org To: "Rafael J. Wysocki" Cc: Nigel Cunningham , Linux PM List-Id: linux-pm@vger.kernel.org --===============21914194991421843== Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Hi! > This is an experimantal patch aimed at the "unable to freeze processes under > load" problem. > > On my box the 2.6.16-rc1-mm4 kernel with this patch applied survives the > "dd if=/dev/hda of=/dev/null" test. What filesystem? ext2 vs. ext3 is very different. I can fix ext2 by just upping the timeout. ext3 is harder, because of the journalling thread. Maybe I'll take the sledgehammer approach and just freeze all the user tasks first... I tried to do the "small" approach and just fix the journalling code... I'm not sure what problem the usermodehelper code is trying to solve... why are usermodehelpers special? Pavel -- Thanks, Sharp! --===============21914194991421843== Content-Type: text/plain; charset="iso-8859-1" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline --===============21914194991421843==--