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([240b:10:2720:5510:a182:288:3ffa:432a]) by smtp.gmail.com with ESMTPSA id x66sm13800214pgb.9.2020.03.23.16.09.21 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 23 Mar 2020 16:09:22 -0700 (PDT) Subject: Re: [PATCH] block, nvme: Increase max segments parameter setting value To: Chaitanya Kulkarni , "linux-block@vger.kernel.org" References: <20200323182324.3243-1-ikegami.t@gmail.com> From: Tokunori Ikegami Message-ID: Date: Tue, 24 Mar 2020 08:09:19 +0900 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.6.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200323_160924_125447_E4F25357 X-CRM114-Status: UNSURE ( 9.99 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "linux-nvme@lists.infradead.org" Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org Hi, > The change looks okay, but why do we need such a large data length ? > > Do you have a use-case or performance numbers ? We use the large data length to get log page by the NVMe admin command. In the past it was able to get with the same length but failed currently with it. So it seems that depended on the kernel version as caused by the version up. Also I have confirmed that currently failed with the length 0x10000000 256MB. Regards, Ikegami _______________________________________________ linux-nvme mailing list linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme