From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 07C02C433FE for ; Mon, 1 Nov 2021 17:54:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E1C19610E5 for ; Mon, 1 Nov 2021 17:54:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230451AbhKAR4p (ORCPT ); Mon, 1 Nov 2021 13:56:45 -0400 Received: from mail.kernel.org ([198.145.29.99]:37650 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229802AbhKAR4p (ORCPT ); Mon, 1 Nov 2021 13:56:45 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 00C82610D2; Mon, 1 Nov 2021 17:54:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1635789251; bh=lYi2aGJ1ooV9VTgAd9ni2Aq8I8gmC2AMQ2WBvVmGyXo=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=USAxOoUpoPthTp0gPLaP0Dmz+IrOklnbz3hxfaINU34HdN1KKLosqti5cOqQYAaqx vAzwAmlRKJCS4A+x3oMJQC9AcOKtiJT2KoUaJ4cme5I1NotGS1dDN/bvui3u93bbcE B3Rn9jI2etOBKHaGzpWpNSKH8+DKvAoPRJRFBtf6N1zm28ciWQseguItfGTE8S5SGE gJyHvhjcrWhkpnG1mmJggGByc6GpS8LMJMtHSKeqjbFpDR5Mxh0w5yTRZEV8GrOCxe BxgY+sBpcZee82y2ujQ1VYBu2NSTbwyTRob4gcnvVGQ+X4+T1CrWDHjF0DwblF8aJB gzM9v7RS/EqpQ== Date: Mon, 1 Nov 2021 10:54:09 -0700 From: Keith Busch To: Bart Van Assche Cc: Hannes Reinecke , "linux-block@vger.kernel.org" , "linux-scsi@vger.kernel.org" , "linux-nvme@lists.infradead.org" , "dm-devel@redhat.com" , "lsf-pc@lists.linux-foundation.org" Subject: Re: [LSF/MM/BFP ATTEND] [LSF/MM/BFP TOPIC] Storage: Copy Offload Message-ID: <20211101175409.GA2651512@dhcp-10-100-145-180.wdc.com> References: <20210928191340.dcoj7qrclpudtjbo@mpHalley.domain_not_set.invalid> <20211006100523.7xrr3qpwtby3bw3a@mpHalley.domain_not_set.invalid> <20211008064925.oyjxbmngghr2yovr@mpHalley.local> <2a65e231-11dd-d5cc-c330-90314f6a8eae@nvidia.com> <5edcab45-afc6-3766-cede-f859da2934d1@acm.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5edcab45-afc6-3766-cede-f859da2934d1@acm.org> Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On Fri, Oct 29, 2021 at 09:15:43AM -0700, Bart Van Assche wrote: > On 10/28/21 10:51 PM, Hannes Reinecke wrote: > > Also Keith presented his work on a simple zone-based remapping block device, which included an in-kernel copy offload facility. > > Idea is to lift that as a standalone patch such that we can use it a fallback (ie software) implementation if no other copy offload mechanism is available. > > Is a link to the presentation available? Thanks for the interest. I didn't post them online as the conference didn't provide it, and I don't think the slides would be particularly interesting without the prepared speech anyway. The presentation described a simple prototype implementing a redirection table on zone block devices. There was one bullet point explaining how a generic kernel implementation would be an improvement. For zoned block devices, an "append" like copy offload would be an even better option. From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E00A9C433F5 for ; Wed, 3 Nov 2021 06:51:04 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 72383610E5 for ; Wed, 3 Nov 2021 06:51:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 72383610E5 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=tempfail smtp.mailfrom=redhat.com Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-504-lr3ADM2mNRyTJCl0BpPxPw-1; 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Mon, 1 Nov 2021 17:54:14 +0000 (UTC) Received: from mimecast-mx02.redhat.com (mimecast04.extmail.prod.ext.rdu2.redhat.com [10.11.55.20]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 5C43340CFD01 for ; Mon, 1 Nov 2021 17:54:14 +0000 (UTC) Received: from us-smtp-1.mimecast.com (us-smtp-2.mimecast.com [205.139.110.61]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 449391064FB3 for ; Mon, 1 Nov 2021 17:54:14 +0000 (UTC) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-56-vLlvqVcYO0qgXY7sOhkhsA-1; Mon, 01 Nov 2021 13:54:12 -0400 X-MC-Unique: vLlvqVcYO0qgXY7sOhkhsA-1 Received: by mail.kernel.org (Postfix) with ESMTPSA id 00C82610D2; Mon, 1 Nov 2021 17:54:10 +0000 (UTC) Date: Mon, 1 Nov 2021 10:54:09 -0700 From: Keith Busch To: Bart Van Assche Message-ID: <20211101175409.GA2651512@dhcp-10-100-145-180.wdc.com> References: <20210928191340.dcoj7qrclpudtjbo@mpHalley.domain_not_set.invalid> <20211006100523.7xrr3qpwtby3bw3a@mpHalley.domain_not_set.invalid> <20211008064925.oyjxbmngghr2yovr@mpHalley.local> <2a65e231-11dd-d5cc-c330-90314f6a8eae@nvidia.com> <5edcab45-afc6-3766-cede-f859da2934d1@acm.org> MIME-Version: 1.0 In-Reply-To: <5edcab45-afc6-3766-cede-f859da2934d1@acm.org> X-Mimecast-Impersonation-Protect: Policy=CLT - Impersonation Protection Definition; Similar Internal Domain=false; Similar Monitored External Domain=false; Custom External Domain=false; Mimecast External Domain=false; Newly Observed Domain=false; Internal User Name=false; Custom Display Name List=false; Reply-to Address Mismatch=false; Targeted Threat Dictionary=false; Mimecast Threat Dictionary=false; Custom Threat Dictionary=false X-Scanned-By: MIMEDefang 2.84 on 10.11.54.1 X-loop: dm-devel@redhat.com X-Mailman-Approved-At: Wed, 03 Nov 2021 02:50:50 -0400 Cc: "linux-scsi@vger.kernel.org" , "linux-nvme@lists.infradead.org" , "linux-block@vger.kernel.org" , "dm-devel@redhat.com" , "lsf-pc@lists.linux-foundation.org" Subject: Re: [dm-devel] [LSF/MM/BFP ATTEND] [LSF/MM/BFP TOPIC] Storage: Copy Offload X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dm-devel-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Disposition: inline Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit On Fri, Oct 29, 2021 at 09:15:43AM -0700, Bart Van Assche wrote: > On 10/28/21 10:51 PM, Hannes Reinecke wrote: > > Also Keith presented his work on a simple zone-based remapping block device, which included an in-kernel copy offload facility. > > Idea is to lift that as a standalone patch such that we can use it a fallback (ie software) implementation if no other copy offload mechanism is available. > > Is a link to the presentation available? Thanks for the interest. I didn't post them online as the conference didn't provide it, and I don't think the slides would be particularly interesting without the prepared speech anyway. The presentation described a simple prototype implementing a redirection table on zone block devices. There was one bullet point explaining how a generic kernel implementation would be an improvement. For zoned block devices, an "append" like copy offload would be an even better option. -- dm-devel mailing list dm-devel@redhat.com https://listman.redhat.com/mailman/listinfo/dm-devel