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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id EB3D8C6FA82 for ; Thu, 22 Sep 2022 05:52:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=NgdmLNRvrO9MsNRfGWQf+ICWwA3A5ez7cVnaWEc3V70=; b=3Olb8elVt2t1D1kxAZhB6jeZjN pby7CgxOGx8qYbnDZ+iIJ1PQWvnekb2sYn1sUMrYVsMg2e1lQzioja91AjcwQtEH55B0DEiDwwACs gv/bsTbXQ4DoRiIAJylZupVqRXvcXGV9GcxOEv7f0F895U2bKdKOHmiXW5J9/kW8amXJcNxeh4D4N gaRRfRfyuRHp4y76SejiuISb8I5rb2bFn4clEzgR27uDnF5vvazhgvgpgjrFfNdEoq9U1kQl2JRsN GJcnEa5rIMmVKw4vQ1ha1rOtc3zh1+vpiUYRfRLQYT4BZ5ncn/G7U0jh8cG7GDpnHPWEiHNDp0mz5 HqErBzsA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1obF8X-00DTBR-Ke; Thu, 22 Sep 2022 05:52:37 +0000 Received: from verein.lst.de ([213.95.11.211]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1obF8V-00DTAF-9X for linux-nvme@lists.infradead.org; Thu, 22 Sep 2022 05:52:36 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id 7A4D268AFE; Thu, 22 Sep 2022 07:52:31 +0200 (CEST) Date: Thu, 22 Sep 2022 07:52:31 +0200 From: Christoph Hellwig To: Rita Lin Cc: Christoph Hellwig , Keith Busch , Jens Axboe , Sagi Grimberg , "linux-nvme@lists.infradead.org" , "linux-kernel@vger.kernel.org" , =?utf-8?B?77+9U+aZn++/vXw=?= , Tina Hsu , Vita Hsueh =?utf-8?B?KOiWm+S8iuWAqSk=?= , "Wang, Audrey" Subject: Re: nvme-pci: disable write zeros support on SSDs Message-ID: <20220922055231.GA27560@lst.de> References: <36fd82e8780742c2881f078f98110e5e@ExMBX2.phison.com> <20220922053137.GA27191@lst.de> <53e4a6192bf746af839d8da90917a248@ExMBX2.phison.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <53e4a6192bf746af839d8da90917a248@ExMBX2.phison.com> User-Agent: Mutt/1.5.17 (2007-11-01) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220921_225235_490240_DBE83C83 X-CRM114-Status: GOOD ( 15.67 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On Thu, Sep 22, 2022 at 05:50:52AM +0000, Rita Lin wrote: > Dear Christoph, > > Thank you for your reply. > These SSDs do support write 0 command and the function was tested without issue. > But since these SSDs are DRAMless products, the write 0 command will take a lot longer to complete which had impacted the product performance. > Due to the FW had been frozen, we would like to check if we could apply CL for these 2 products. please add a comment explaining this to the IDs entry.