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b=CBJTmn70bf0S5kQZRZoIURJqd5rotcvDLBeunUS5A4o8J700UhdWQZ515Kc7wvcNiq2ohJ iPw3uDtCquvmI1Dg== Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id 2B4E713A1E; Tue, 21 May 2024 06:57:30 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id ZimnBdpFTGbsOAAAD6G6ig (envelope-from ); Tue, 21 May 2024 06:57:30 +0000 Message-ID: Date: Tue, 21 May 2024 08:57:29 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v20 01/12] block: Introduce queue limits and sysfs for copy-offload support Content-Language: en-US To: Nitesh Shetty , Jens Axboe , Jonathan Corbet , Alasdair Kergon , Mike Snitzer , Mikulas Patocka , Keith Busch , Christoph Hellwig , Sagi Grimberg , Chaitanya Kulkarni , Alexander Viro , Christian Brauner , Jan Kara Cc: martin.petersen@oracle.com, bvanassche@acm.org, david@fromorbit.com, damien.lemoal@opensource.wdc.com, anuj20.g@samsung.com, joshi.k@samsung.com, nitheshshetty@gmail.com, gost.dev@samsung.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, dm-devel@lists.linux.dev, linux-nvme@lists.infradead.org, linux-fsdevel@vger.kernel.org References: <20240520102033.9361-1-nj.shetty@samsung.com> <20240520102033.9361-2-nj.shetty@samsung.com> From: Hannes Reinecke In-Reply-To: <20240520102033.9361-2-nj.shetty@samsung.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Flag: NO X-Spam-Score: -4.50 X-Rspamd-Action: no action X-Rspamd-Queue-Id: 3B5BF5BF04 X-Spam-Level: X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Spamd-Result: default: False [-4.50 / 50.00]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; XM_UA_NO_VERSION(0.01)[]; MX_GOOD(-0.01)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FUZZY_BLOCKED(0.00)[rspamd.com]; ARC_NA(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCPT_COUNT_TWELVE(0.00)[27]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; RCVD_TLS_ALL(0.00)[]; TO_DN_SOME(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; FREEMAIL_CC(0.00)[oracle.com,acm.org,fromorbit.com,opensource.wdc.com,samsung.com,gmail.com,vger.kernel.org,lists.linux.dev,lists.infradead.org]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; DWL_DNSWL_BLOCKED(0.00)[suse.de:dkim]; DKIM_TRACE(0.00)[suse.de:+]; R_RATELIMIT(0.00)[to_ip_from(RLghztw5pzjjmtx4kirkcu9cad)]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:dkim,suse.de:email] On 5/20/24 12:20, Nitesh Shetty wrote: > Add device limits as sysfs entries, > - copy_max_bytes (RW) > - copy_max_hw_bytes (RO) > > Above limits help to split the copy payload in block layer. > copy_max_bytes: maximum total length of copy in single payload. > copy_max_hw_bytes: Reflects the device supported maximum limit. > > Signed-off-by: Nitesh Shetty > Signed-off-by: Kanchan Joshi > Signed-off-by: Anuj Gupta > --- > Documentation/ABI/stable/sysfs-block | 23 +++++++++++++++ > block/blk-settings.c | 34 ++++++++++++++++++++-- > block/blk-sysfs.c | 43 ++++++++++++++++++++++++++++ > include/linux/blkdev.h | 14 +++++++++ > 4 files changed, 112 insertions(+), 2 deletions(-) > Reviewed-by: Hannes Reinecke Cheers, Hannes -- Dr. Hannes Reinecke Kernel Storage Architect hare@suse.de +49 911 74053 688 SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg HRB 36809 (AG Nürnberg), GF: I. Totev, A. McDonald, W. Knoblich