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([2620:15c:211:201:efb8:1cdc:a06f:1b53]) by smtp.gmail.com with ESMTPSA id kd5-20020a17090313c500b00198f256a192sm518141plb.171.2023.03.03.15.51.29 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 03 Mar 2023 15:51:29 -0800 (PST) Message-ID: <88c2c5c6-972f-d089-b1bd-03e0c083c886@acm.org> Date: Fri, 3 Mar 2023 15:51:28 -0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.7.1 Subject: Re: [LSF/MM/BPF TOPIC] Cloud storage optimizations Content-Language: en-US To: Luis Chamberlain , Matthew Wilcox Cc: Keith Busch , Theodore Ts'o , Pankaj Raghav , Daniel Gomez , =?UTF-8?Q?Javier_Gonz=c3=a1lez?= , lsf-pc@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-block@vger.kernel.org References: From: Bart Van Assche In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: AE5E31C000F X-Stat-Signature: 74whbkyoy7wr6kp7k1n7sy4oxngngqdk X-HE-Tag: 1677887492-127466 X-HE-Meta: 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 l1YRPcxI 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000168, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 3/3/23 13:45, Luis Chamberlain wrote: > I'm gathering there is generic interest in this topic though. Some Android storage vendors are interested in larger block sizes, e.g. 16 KiB. Android currently uses UFS storage and may switch to NVMe in the future. > This also got me thinking about ways to try to replicate > larger IO virtual devices a bit better too. Is null_blk good enough to test large block size support in filesystems and the block layer? Thanks, Bart.