From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.0 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED,DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2DAABC43331 for ; Tue, 31 Mar 2020 15:37:39 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id F3C09208E0 for ; Tue, 31 Mar 2020 15:37:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="ahr+2VHc"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="fqwdL2HD" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org F3C09208E0 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender:Content-Type: Content-Transfer-Encoding:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date:Message-ID:From: References:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=2hv7JF6cQX4m8k/34/0Bt7QmHUEUpz+vKPYYz/lUWiU=; b=ahr+2VHcO8qAVE6sj8PJybjbr XJ9APKTTsiPn4htTraYJDAjAgwos3onkYf3FdpKYxhQMmea5WkS5aB7l70MznjmiGhH9aRM5VbAVh QuTKrKYG9EZKtOU4OiwISimPK7CAjb7NB2BZfkI1dlOxmKWarmR1tgnMoRcoSJtOjm3ekpVDRVXFe XoRaMElgZap8rFyfFazjPwHoD4tc2wNEkiLkgXd1MK+I7f/PQn3pr1DmDmWPOO5BMLWmH9gIk7bFO p9YVh1W1LJughmYWZU4QBlDET330A4NpzOF2sjIMdqnGZY9qmNxFdICpXnEUypxk5DKLoQJXbC/fJ RqVqchHBg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jJIxM-0003Fq-Vu; Tue, 31 Mar 2020 15:37:36 +0000 Received: from mail-pl1-x644.google.com ([2607:f8b0:4864:20::644]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jJIxJ-0003EE-P3 for linux-nvme@lists.infradead.org; Tue, 31 Mar 2020 15:37:35 +0000 Received: by mail-pl1-x644.google.com with SMTP id a23so8261433plm.1 for ; Tue, 31 Mar 2020 08:37:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-transfer-encoding:content-language; bh=AIJaewX8GfCCNVseZs66fzOQB91yKeoYu4/Ep9E7PaI=; b=fqwdL2HD2ynty7HmKt6Q3mkGsMmztvgSpfY+9rj4EbEx5K0xOstNlgD4sRPPsBmYMI jQKKxax+vROKD5bu9sAeDbd9SnI7PNjoRkgpU/kSRQuKYZd8CQBxMtAaiZNtx7e/g7sO iHIIBtHxmfl30ClUbVBx1Y11p+y3Z/x4wE8aieLplXMtvHRD9c20+cjdpKQCWiWRi31Q KTeLk20vCrEMcjKJDzFmHUdJ+R6nAIX7QapbnZBjHaJKOR046qwZhnawaCHRCOdZ1cqU 97oNBCqUPnWr/nEaSvkYVfZJNoQPAJZj+eZtxhSqHnOTQO2xa+1prgPegntk7xFihScP VC5Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding :content-language; bh=AIJaewX8GfCCNVseZs66fzOQB91yKeoYu4/Ep9E7PaI=; b=FxWAYUY8Dzzu8ZUbTU7ETY2u1L+M+DYFcPjsCVKD23RgIy3Iz8px08kXvQOtcU5VTA ZRLV6PF+ilNIcS+xYtTV4HM7YpyWCWN1/cbA6n2zr7cvWgqlFjqWdN5eZOco70p6dAGV C6sB5LKDmcXw5UeYg/fo5EK4yrckgL3Eb2jUvHwJVxU/jVP0LoqPEfpYHew4A14PiByQ Sl8/sXwvz3TU+hdk9aZRsfcy89lwr9tFbsUQxsS4nCapiFmiO++/VTDaoUuQY0UpYeN3 HQZV4dVFD2ZDyQLgQy8rqFwF6AA7WMKcgcxvuyGHJa969butIs/u9nX5yMz+NJoJSYm2 0WFQ== X-Gm-Message-State: AGi0PubV9m9DzUMSUGiUDuuL+Ev6FA+GMV71Nbjza3DojYlf4KlfGWWp WJVjQdarviYRAjXlURAj0rU= X-Google-Smtp-Source: APiQypKjy8p0X5p701s5Kmd7nfiCE0gP6442ZhQ46+pvCrU9CIXn/YOOhpfWscoL/0CTifCg23RbAQ== X-Received: by 2002:a17:90a:218e:: with SMTP id q14mr4578731pjc.37.1585669052603; Tue, 31 Mar 2020 08:37:32 -0700 (PDT) Received: from ?IPv6:240b:10:2720:5510:a182:288:3ffa:432a? ([240b:10:2720:5510:a182:288:3ffa:432a]) by smtp.gmail.com with ESMTPSA id x4sm12683810pfi.202.2020.03.31.08.37.30 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 31 Mar 2020 08:37:32 -0700 (PDT) Subject: Re: [PATCH] block, nvme: Increase max segments parameter setting value To: Joshi References: <20200323182324.3243-1-ikegami.t@gmail.com> <20200324000237.GB15091@redsun51.ssa.fujisawa.hgst.com> <6b73db44-ca3f-4285-0c91-dc1b1a5ca9f1@gmail.com> <20200327181825.GA8356@redsun51.ssa.fujisawa.hgst.com> From: Tokunori Ikegami Message-ID: Date: Wed, 1 Apr 2020 00:37:28 +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-20200331_083733_824239_2A7F6596 X-CRM114-Status: GOOD ( 10.81 ) 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: Keith Busch , Ming Lei , "linux-block@vger.kernel.org" , Chaitanya Kulkarni , "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, On 2020/03/31 23:13, Joshi wrote: > Hi Ikegami, > > Are you actually able to bump up the max segments with the original patch? No as you mentioned currently it is limited by NVME_MAX_SEGS. On the older kernel version it was not limited by the value but limited by USHRT_MAX. So it was able to change the limit by the patch. As Keith-san also mentioned currently it is limited by the 4MB and 127 segments as you mentioned by the NVMe PCIe driver. So I will do abandon the patch to increase max segments. Regards, Ikegami _______________________________________________ linux-nvme mailing list linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme