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 DBAFBC4332F for ; Fri, 29 Oct 2021 05:51:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B81E061157 for ; Fri, 29 Oct 2021 05:51:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231844AbhJ2Fxe (ORCPT ); Fri, 29 Oct 2021 01:53:34 -0400 Received: from smtp-out1.suse.de ([195.135.220.28]:37766 "EHLO smtp-out1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231774AbhJ2Fxe (ORCPT ); Fri, 29 Oct 2021 01:53:34 -0400 Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id DAEDD218E0; Fri, 29 Oct 2021 05:51:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1635486664; 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=ZkHtVMt92gUgbsYTtS4S1lP2SDGldWukUMlY/TrnM0E=; b=E1iGctEvkOk8C1MZU+wzQNeMxIna9MZ50SbzoCyuQXXja+p1KvdqzzB/po54k0GnY0qfy2 Yy9q1uXRrOWK68qh0/Rg60z4DVDWRMmTSnYjxMSdsx/TYbRGMTByrxIiLGAnOsZEkiH3gf NiyWzDnswqu/MbihUotjCokAleF92fc= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1635486664; 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=ZkHtVMt92gUgbsYTtS4S1lP2SDGldWukUMlY/TrnM0E=; b=K8drR/+tVTdMf9IuYydU4OQxbBlXc+WpgVdm6e41TjOCS4FgIAT3Om/h6mDVY9xwoLziWH KxhhiWo4soKjIEDA== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 19BF713AF5; Fri, 29 Oct 2021 05:51:04 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id JCVQA8iLe2GSVAAAMHmgww (envelope-from ); Fri, 29 Oct 2021 05:51:04 +0000 Subject: Re: [LSF/MM/BFP ATTEND] [LSF/MM/BFP TOPIC] Storage: Copy Offload To: Chaitanya Kulkarni , =?UTF-8?Q?Javier_Gonz=c3=a1lez?= Cc: Johannes Thumshirn , Chaitanya Kulkarni , "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" , "axboe@kernel.dk" , "msnitzer@redhat.com" , "martin.petersen@oracle.com" , "roland@purestorage.com" , "mpatocka@redhat.com" , "kbusch@kernel.org" , "rwheeler@redhat.com" , "hch@lst.de" , "Frederick.Knight@netapp.com" , "zach.brown@ni.com" , "osandov@fb.com" , Adam Manzanares , SelvaKumar S , Nitesh Shetty , Kanchan Joshi , Vincent Fu , Bart Van Assche 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> From: Hannes Reinecke Message-ID: Date: Fri, 29 Oct 2021 07:51:03 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.12.0 MIME-Version: 1.0 In-Reply-To: <2a65e231-11dd-d5cc-c330-90314f6a8eae@nvidia.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On 10/29/21 2:21 AM, Chaitanya Kulkarni wrote: > On 10/7/21 11:49 PM, Javier González wrote: >> External email: Use caution opening links or attachments >> >> >> On 06.10.2021 10:33, Bart Van Assche wrote: >>> On 10/6/21 3:05 AM, Javier González wrote: >>>> I agree that the topic is complex. However, we have not been able to >>>> find a clear path forward in the mailing list. >>> >>> Hmm ... really? At least Martin Petersen and I consider device mapper >>> support essential. How about starting from Mikulas' patch series that >>> supports the device mapper? See also >>> https://lore.kernel.org/all/alpine.LRH.2.02.2108171630120.30363@file01.intranet.prod.int.rdu2.redhat.com/ >>> > > When we add a new REQ_OP_XXX we need to make sure it will work with > device mapper, so I agree with Bart and Martin. > > Starting with Mikulas patches is a right direction as of now.. > >> >> Thanks for the pointers. We are looking into Mikulas' patch - I agree >> that it is a good start. >> >>>> What do you think about joining the call to talk very specific next >>>> steps to get a patchset that we can start reviewing in detail. >>> >>> I can do that. >> >> Thanks. I will wait until Chaitanya's reply on his questions. We will >> start suggesting some dates then. >> > > I think at this point we need to at least decide on having a first call > focused on how to proceed forward with Mikulas approach ... > > Javier, can you please organize a call with people you listed in this > thread earlier ? > 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. 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 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 298C3C433F5 for ; Fri, 29 Oct 2021 05:51:28 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 8D5B86108F for ; Fri, 29 Oct 2021 05:51:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 8D5B86108F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; 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Fri, 29 Oct 2021 01:51:09 -0400 Received: by smtp.corp.redhat.com (Postfix) id 947D04010FEC; Fri, 29 Oct 2021 05:51:09 +0000 (UTC) Received: from mimecast-mx02.redhat.com (mimecast01.extmail.prod.ext.rdu2.redhat.com [10.11.55.17]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 8F8D840CFD0B for ; Fri, 29 Oct 2021 05:51:09 +0000 (UTC) Received: from us-smtp-1.mimecast.com (us-smtp-delivery-1.mimecast.com [207.211.31.120]) (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 750BF866DF1 for ; Fri, 29 Oct 2021 05:51:09 +0000 (UTC) Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-125-1HzmXEbZO8m_OvIVhn3zwA-1; Fri, 29 Oct 2021 01:51:06 -0400 X-MC-Unique: 1HzmXEbZO8m_OvIVhn3zwA-1 Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id DAEDD218E0; Fri, 29 Oct 2021 05:51:04 +0000 (UTC) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 19BF713AF5; Fri, 29 Oct 2021 05:51:04 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id JCVQA8iLe2GSVAAAMHmgww (envelope-from ); Fri, 29 Oct 2021 05:51:04 +0000 To: Chaitanya Kulkarni , =?UTF-8?Q?Javier_Gonz=c3=a1lez?= 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> From: Hannes Reinecke Message-ID: Date: Fri, 29 Oct 2021 07:51:03 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.12.0 MIME-Version: 1.0 In-Reply-To: <2a65e231-11dd-d5cc-c330-90314f6a8eae@nvidia.com> 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-MIME-Autoconverted: from quoted-printable to 8bit by lists01.pubmisc.prod.ext.phx2.redhat.com id 19T5p97S001687 X-loop: dm-devel@redhat.com Cc: Vincent Fu , "linux-nvme@lists.infradead.org" , "dm-devel@redhat.com" , Adam Manzanares , "osandov@fb.com" , "msnitzer@redhat.com" , Bart Van Assche , "linux-scsi@vger.kernel.org" , "hch@lst.de" , "roland@purestorage.com" , Nitesh Shetty , "zach.brown@ni.com" , SelvaKumar S , Chaitanya Kulkarni , "linux-block@vger.kernel.org" , "mpatocka@redhat.com" , "kbusch@kernel.org" , "Frederick.Knight@netapp.com" , "axboe@kernel.dk" , "martin.petersen@oracle.com" , Kanchan Joshi , Johannes Thumshirn , "lsf-pc@lists.linux-foundation.org" , "rwheeler@redhat.com" 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 10.5.11.16 Authentication-Results: relay.mimecast.com; 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