From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764097AbYCGANd (ORCPT ); Thu, 6 Mar 2008 19:13:33 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752724AbYCGANV (ORCPT ); Thu, 6 Mar 2008 19:13:21 -0500 Received: from rn-out-0910.google.com ([64.233.170.188]:2075 "EHLO rn-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752641AbYCGANV (ORCPT ); Thu, 6 Mar 2008 19:13:21 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:user-agent:mime-version:to:cc:subject:references:in-reply-to:x-enigmail-version:content-type:content-transfer-encoding; b=iADGttA2hN7hstNIPfS7PPkFvA4pCxzqT+D8xminnXNlYHaUCWaSZlmCxCQgotSfYBOaReIV85UJu2DkfNA/GtUwFWBTr/yCUtEQvqRnEwJdquZf3UkntIuwOIry1x/QPSeqR5xOGKALiXLWKVjt16cu9Xrxu0+x1ra5ClZWj7g= Message-ID: <47D08892.3080209@gmail.com> Date: Fri, 07 Mar 2008 09:13:06 +0900 From: Tejun Heo User-Agent: Thunderbird 2.0.0.9 (X11/20070801) MIME-Version: 1.0 To: James Bottomley CC: Mark Lord , Matthew Wilcox , linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org, Jeff Garzik Subject: Re: ata_ram driver References: <20080222200951.GI16995@parisc-linux.org> <47BF3E54.9050609@rtr.ca> <47CFA9A6.2040506@gmail.com> <1204817301.3062.3.camel@localhost.localdomain> <47D08478.8010700@gmail.com> <1204848119.3062.94.camel@localhost.localdomain> In-Reply-To: <1204848119.3062.94.camel@localhost.localdomain> X-Enigmail-Version: 0.95.5 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org James Bottomley wrote: >> * Driver unload: Dealt the same way as hot unplugging. > > This is the problem case: driver unloading should have a > scsi_remove_host() in its path. This is the trigger that sends out the > flushes/stops and calls slave_destroy. scsi_remove_host() doesn't > actually return until all the destroys are completed, so it makes module > unloading wait until everything is properly shut down. > >> Making driver unload like explicit unplug request is possible but it >> will mean that drives will be spun down on driver unload, which can be >> annoying to developers. > > You have a sysfs flag to prevent that, don't you? Yeap, sure. It's the combination of things that always made me put this off. Is there a function I can call to just shutdown the host instead of destroying it? Thanks. -- tejun