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=-2.7 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 82B6CC43331 for ; Mon, 30 Mar 2020 13:53:36 +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 53D77206CC for ; Mon, 30 Mar 2020 13:53:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="d7h62+Jp"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="vUJuqJD9" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 53D77206CC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org 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-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=5aYHC0ULKZknnFxfrY7DR1RZBwHrprnxQDSaseoEuZk=; b=d7h62+Jp6NgmlO E6akuSRiZIz9vcqLbnclQW9CXaUHkdv8+s+UfY3NBIsMmLIbOf3oneiU83cvrWI76LOVe5Yt2xzPW ZAWf2rcGBZBoWOdzmu/SGCFE57Rf4/jBk0H2yLymY5EomHjU5/WdNSLdR77FryDqgiLr55aXD299C PP2CFoOgQ3xwRORuMfsjl1p866fplOi5/pp4lKrbUY/6jksHE3U6YwvD4OmpoEZMuF8b0cNIL2SZW STFSTiR9DhIvawgoG5Ai+VdR42KjrTQ2B+tAEVj4CEzOhz3WcNpkCwOeo7iekUk1CLFUVEbN4rzKG JAxIxO4OBfreLp520ERg==; 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 1jIur4-0004qJ-Eu; Mon, 30 Mar 2020 13:53:30 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jIur0-0004ll-AF for linux-nvme@lists.infradead.org; Mon, 30 Mar 2020 13:53:27 +0000 Received: from C02WT3WMHTD6 (unknown [8.36.226.102]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 53AFA206CC; Mon, 30 Mar 2020 13:53:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585576405; bh=9fj94aO+4iZ5CJVZaUxcTEXkFO9lNUuFcHzpzx0huIg=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=vUJuqJD9rP+HVMcF2vqQ/l2b7bWGsDibN/cJ6LOXo70nGdl2Sv2L3HajIyzdCENtf UBeBcJxxwtOxqAmQFfarvAsuPG6VLuLcMaNZRSZjOrU0BffsCnKwbsfYUWxGcgK4Ld poJII5poqzXZhxe3nQoK0eTu9BIUcPCC0yvN0cyc= Date: Mon, 30 Mar 2020 07:53:23 -0600 From: Keith Busch To: Tokunori Ikegami Subject: Re: [PATCH] block, nvme: Increase max segments parameter setting value Message-ID: <20200330135323.GA32604@C02WT3WMHTD6> References: <20200324000237.GB15091@redsun51.ssa.fujisawa.hgst.com> <6b73db44-ca3f-4285-0c91-dc1b1a5ca9f1@gmail.com> <20200327181825.GA8356@redsun51.ssa.fujisawa.hgst.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.12.1 (2019-06-15) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200330_065326_417967_77AC54F9 X-CRM114-Status: UNSURE ( 7.82 ) 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-block@vger.kernel.org" , Ming Lei , Chaitanya Kulkarni , "linux-nvme@lists.infradead.org" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On Mon, Mar 30, 2020 at 06:15:41PM +0900, Tokunori Ikegami wrote: > But there is a case that the command data length is limited by 512KB. > I am not sure about this condition so needed more investigation. Your memory is too fragmented. You need more physically contiguous memory or you'll hit the segment limit before you hit the length limit. Try allocating huge pages. _______________________________________________ linux-nvme mailing list linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme