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Mon, 31 May 2021 04:26:14 -0400 Received: from imap.suse.de (imap-alt.suse-dmz.suse.de [192.168.254.47]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id E44AE2191F; Mon, 31 May 2021 08:24:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1622449473; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=K7IUpnFl8MiyaREqhYO3UJlM9LtjduOHzIC1QfHta58=; b=IG4LEwJvHGirCDc1Lh1d0DONz8EoqPOwZeJUbUm//hC4iTNL8Bka4Rb1mVu2mNANEWQl6y 5IDeRYa92bH4wMaPMKfF7/xSzOctVb9m8jwOZA20rpQcfTFZTyX1VzLbv6ve4XuDnGeOsY DLm9Ut0npH0djdtovyYmNbtFeJQu8bQ= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1622449473; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=K7IUpnFl8MiyaREqhYO3UJlM9LtjduOHzIC1QfHta58=; b=BD4cQyVGaw8EUOCwylWkJc7diFOa+7+h8voTDO5Zyb4GirSqtAn0echvCDcCNU6kjVJaPI wl64J5i4XKYfAcCg== Received: from imap3-int (imap-alt.suse-dmz.suse.de [192.168.254.47]) by imap.suse.de (Postfix) with ESMTP id 86671118DD; Mon, 31 May 2021 08:24:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1622449473; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=K7IUpnFl8MiyaREqhYO3UJlM9LtjduOHzIC1QfHta58=; b=IG4LEwJvHGirCDc1Lh1d0DONz8EoqPOwZeJUbUm//hC4iTNL8Bka4Rb1mVu2mNANEWQl6y 5IDeRYa92bH4wMaPMKfF7/xSzOctVb9m8jwOZA20rpQcfTFZTyX1VzLbv6ve4XuDnGeOsY DLm9Ut0npH0djdtovyYmNbtFeJQu8bQ= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1622449473; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=K7IUpnFl8MiyaREqhYO3UJlM9LtjduOHzIC1QfHta58=; b=BD4cQyVGaw8EUOCwylWkJc7diFOa+7+h8voTDO5Zyb4GirSqtAn0echvCDcCNU6kjVJaPI wl64J5i4XKYfAcCg== Received: from director2.suse.de ([192.168.254.72]) by imap3-int with ESMTPSA id t880IEGdtGAFNAAALh3uQQ (envelope-from ); Mon, 31 May 2021 08:24:33 +0000 Subject: Re: [PATCH] remove the raw driver To: Arnd Bergmann , Greg KH Cc: Christoph Hellwig , Jens Axboe , linux-block References: <20210531072526.97052-1-hch@lst.de> From: Hannes Reinecke Message-ID: <3665636f-6a74-e24f-e4b7-ff7790ebb3e4@suse.de> Date: Mon, 31 May 2021 10:24:33 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Authentication-Results: imap.suse.de; none X-Spamd-Result: default: False [0.00 / 100.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; RCPT_COUNT_FIVE(0.00)[5]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; TO_DN_ALL(0.00)[]; RCVD_NO_TLS_LAST(0.10)[]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_COUNT_TWO(0.00)[2]; MID_RHS_MATCH_FROM(0.00)[] Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On 5/31/21 10:21 AM, Arnd Bergmann wrote: > On Mon, May 31, 2021 at 9:38 AM Greg KH wrote: >> >> On Mon, May 31, 2021 at 10:25:26AM +0300, Christoph Hellwig wrote: >>> The raw driver used to provide direct unbuffered access to block devices >>> before O_DIRECT was invented. It has been obsolete for more than a >>> decade. >> >> What? Really? We can finally do this? Yes! >> >> For some reason, I thought there was some IBM userspace tools that >> relied on this device, if not, then great! >> >>> Signed-off-by: Christoph Hellwig >> >> Acked-by: Greg Kroah-Hartman > > Acked-by: Arnd Bergmann > Link: https://lore.kernel.org/lkml/Pine.LNX.4.64.0703180754060.6605@CPE00045a9c397f-CM001225dbafb6/ > > The discussion from 2007 is the last one I could find on lore that has > useful information on when and why this was not removed in the past. > The driver was scheduled from a 2005 removal in 2004, but not removed > because both Red Hat and SuSE relied on the feature in their distros. > > From what I could find out, this continued to be the case in Red Hat > Enterprise Linux 6 and SUSE Linux Enterprise server 11 that were > supported between 2009 and 2020, but the following versions dropped > the support. > Which I can confirm for SUSE. Cheers, Hannes -- Dr. Hannes Reinecke Kernel Storage Architect hare@suse.de +49 911 74053 688 SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg HRB 36809 (AG Nürnberg), Geschäftsführer: Felix Imendörffer