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([2620:15c:211:201:c1f1:7d21:6172:cbd2]) by smtp.gmail.com with ESMTPSA id l6-20020a656806000000b005579c73d209sm15456631pgt.1.2023.07.05.08.19.17 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 05 Jul 2023 08:19:23 -0700 (PDT) Message-ID: <1ea08f84-f900-92f2-e32b-2db242a74559@acm.org> Date: Wed, 5 Jul 2023 08:19:16 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.11.0 Subject: Re: [PATCH 01/32] block: Provide blkdev_get_handle_* functions Content-Language: en-US To: Matthew Wilcox Cc: Jan Kara , linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, Jens Axboe , Christoph Hellwig , Alasdair Kergon , Andrew Morton , Anna Schumaker , Chao Yu , Christian Borntraeger , "Darrick J. Wong" , Dave Kleikamp , David Sterba , dm-devel@redhat.com, drbd-dev@lists.linbit.com, Gao Xiang , Jack Wang , Jaegeuk Kim , jfs-discussion@lists.sourceforge.net, Joern Engel , Joseph Qi , Kent Overstreet , linux-bcache@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-mm@kvack.org, linux-mtd@lists.infradead.org, linux-nfs@vger.kernel.org, linux-nilfs@vger.kernel.org, linux-nvme@lists.infradead.org, linux-pm@vger.kernel.org, linux-raid@vger.kernel.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, linux-xfs@vger.kernel.org, "Md. Haris Iqbal" , Mike Snitzer , Minchan Kim , ocfs2-devel@oss.oracle.com, reiserfs-devel@vger.kernel.org, Sergey Senozhatsky , Song Liu , Sven Schnelle , target-devel@vger.kernel.org, Ted Tso , Trond Myklebust , xen-devel@lists.xenproject.org References: <20230629165206.383-1-jack@suse.cz> <20230704122224.16257-1-jack@suse.cz> From: Bart Van Assche In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-1.5 required=5.0 tests=BAYES_00, FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS, NICE_REPLY_A,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_NONE, SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org On 7/4/23 09:14, Matthew Wilcox wrote: > On Tue, Jul 04, 2023 at 07:06:26AM -0700, Bart Van Assche wrote: >> On 7/4/23 05:21, Jan Kara wrote: >>> +struct bdev_handle { >>> + struct block_device *bdev; >>> + void *holder; >>> +}; >> >> Please explain in the patch description why a holder pointer is introduced >> in struct bdev_handle and how it relates to the bd_holder pointer in struct >> block_device. Is one of the purposes of this patch series perhaps to add >> support for multiple holders per block device? > > That is all in patch 0/32. Why repeat it? This cover letter: https://lore.kernel.org/linux-block/20230629165206.383-1-jack@suse.cz/T/#t? The word "holder" doesn't even occur in that cover letter so how could the answer to my question be present in the cover letter? Bart.