From patchwork Wed Nov 11 11:50:31 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Dasgupta, Romit" X-Patchwork-Id: 59318 Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id nABBpGqk012139 for ; Wed, 11 Nov 2009 11:51:17 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756986AbZKKLvK (ORCPT ); Wed, 11 Nov 2009 06:51:10 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753377AbZKKLvK (ORCPT ); Wed, 11 Nov 2009 06:51:10 -0500 Received: from bear.ext.ti.com ([192.94.94.41]:56714 "EHLO bear.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753097AbZKKLvJ (ORCPT ); Wed, 11 Nov 2009 06:51:09 -0500 Received: from dbdp31.itg.ti.com ([172.24.170.98]) by bear.ext.ti.com (8.13.7/8.13.7) with ESMTP id nABBocsW004789 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 11 Nov 2009 05:50:43 -0600 Received: from [172.24.190.181] (localhost [127.0.0.1]) by dbdp31.itg.ti.com (8.13.8/8.13.8) with ESMTP id nABBoXlr003787; Wed, 11 Nov 2009 17:20:34 +0530 (IST) Subject: Re: [PATCH 1/1]: Thaws refrigerated bdi flusher threads before invoking kthread_stop on them From: Romit Dasgupta Reply-To: romit@ti.com To: "Rafael J. Wysocki" Cc: Pavel Machek , "jens.axboe@oracle.com" , "linux-kernel@vger.kernel.org" , "linux-omap@vger.kernel.org" , "linux-pm@lists.linux-foundation.org" In-Reply-To: <200911111230.58479.rjw@sisk.pl> References: <1257928216.15415.57.camel@boson> <20091111103444.GD26423@elf.ucw.cz> <200911111230.58479.rjw@sisk.pl> Organization: Texas Instruments Date: Wed, 11 Nov 2009 17:20:31 +0530 Message-ID: <1257940231.28810.2.camel@boson> Mime-Version: 1.0 X-Mailer: Evolution 2.28.1 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org diff --git a/mm/backing-dev.c b/mm/backing-dev.c index 5a37e20..c757b05 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -606,8 +606,11 @@ static void bdi_wb_shutdown(struct backing_dev_info *bdi) * Finally, kill the kernel threads. We don't need to be RCU * safe anymore, since the bdi is gone from visibility. */ - list_for_each_entry(wb, &bdi->wb_list, list) + list_for_each_entry(wb, &bdi->wb_list, list) { + if (unlikely(frozen(wb->task))) + wb->task->flags &= ~PF_FROZEN; kthread_stop(wb->task); + } } void bdi_unregister(struct backing_dev_info *bdi)