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Mon, 09 Sep 2024 12:48:25 -0700 (PDT) Received: from [192.168.1.150] ([198.8.77.157]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-7d823736c8esm3709751a12.8.2024.09.09.12.48.24 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 09 Sep 2024 12:48:24 -0700 (PDT) Message-ID: <8e15be46-75af-4d3e-ac75-8c38ec179b0c@kernel.dk> Date: Mon, 9 Sep 2024 13:48:23 -0600 Precedence: bulk X-Mailing-List: fio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 0/7] fio: atomic write support To: John Garry , Luis Chamberlain , Vincent Fu Cc: fio@vger.kernel.org, martin.petersen@oracle.com, djwong@kernel.org, Pankaj Raghav , Daniel Gomez , Dan Helmick References: <20240829123107.520005-1-john.g.garry@oracle.com> <316ec2a1-52f8-49e5-9645-f93f3e7c5383@oracle.com> <76e0cf08-e0ac-4443-b107-86e7d2e4c23d@oracle.com> Content-Language: en-US From: Jens Axboe In-Reply-To: <76e0cf08-e0ac-4443-b107-86e7d2e4c23d@oracle.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 9/9/24 2:12 AM, John Garry wrote: > On 07/09/2024 00:29, Luis Chamberlain wrote: >> On Fri, Sep 06, 2024 at 04:22:24PM +0100, John Garry wrote: >>> However, if we have multiple jobs, they may overwrite blocks from other jobs >>> - fio warns us about that. As such, in verify mode, the read sequence number >>> may not match was we were expecting with multiple jobs running. >> Is that a generic bug in fio? > > I wouldn't say so. That is just how the verify mode works. It is, and it's quite possible to craft a job that won't verify (even though fio warns you about it, as you said). If you have separate IO threads stomping on each others writes, it won't verify. That's mostly a "doctor it hurts when I..." situation. FWIW, Luis, your email gets marked as spam. I think you need to check settings. I only see John's replies. -- Jens Axboe