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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 923D7CA0ECE for ; Mon, 11 Sep 2023 21:03:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240862AbjIKU4m (ORCPT ); Mon, 11 Sep 2023 16:56:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35036 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243799AbjIKRpl (ORCPT ); Mon, 11 Sep 2023 13:45:41 -0400 Received: from mail-pl1-f169.google.com (mail-pl1-f169.google.com [209.85.214.169]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BE948CC for ; Mon, 11 Sep 2023 10:45:34 -0700 (PDT) Received: by mail-pl1-f169.google.com with SMTP id d9443c01a7336-1c06f6f98c0so39518185ad.3 for ; Mon, 11 Sep 2023 10:45:34 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1694454334; x=1695059134; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=OmhLML4KpR4efDlZrStXoV2DBR7UACdYfD3+iLTBzB0=; b=E9i89Sul7NmLBJtYU3SqetRKpsbTuoP6KlI1V3Kj5ZdqiXetiXF9LDZaAIY7xlsDaV zTQjkOggt9d5CkR6hnnef3J6LYPgbXg8c78Q97qW+8Kgb7WVwLpYXVUyXs6T1wJtiyc/ aM1dYKGVIzgjbTqlgP+lA/0sPTWGF/3nEvFIjGvFjpEwBMlCO46wWdgfFdBf2yDqrgkz k7rRSbgYQvn1P0Kzwi5igvEOVhhkJ0jzT/fZQKgY3NLCiMGoROWkCf+6jj4rAZ8qVRiB G35oQ5ilN3KC+URCwX2mLC//746eKqpkNKgjXQZVQ+39Z0YiVNAuUbiXt8pewQmK1u4B H8+g== X-Gm-Message-State: AOJu0YxMpR0K6nuiuN3NczkzKkW+nQYqq22XKZ+zMI09+s2I3LvYVXqJ xopSWp+gUhhAYgivKcJEEso= X-Google-Smtp-Source: AGHT+IGAK1vwR2Dtvo6dIMcAFPA8RxqV5y2QVj7GHOxfrQJ5uzFSxcAdrqQPGc2hdLaQLMx2eo6DMw== X-Received: by 2002:a17:902:9046:b0:1c3:c5b5:8a83 with SMTP id w6-20020a170902904600b001c3c5b58a83mr1333592plz.4.1694454333824; Mon, 11 Sep 2023 10:45:33 -0700 (PDT) Received: from ?IPV6:2601:647:5f00:5f5:4a46:e57b:bee0:6bc6? ([2601:647:5f00:5f5:4a46:e57b:bee0:6bc6]) by smtp.gmail.com with ESMTPSA id k4-20020a170902694400b001b531e8a000sm6712119plt.157.2023.09.11.10.45.32 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 11 Sep 2023 10:45:33 -0700 (PDT) Message-ID: <3c66d844-67e5-82d2-6d14-9f6c6b6fcc36@acm.org> Date: Mon, 11 Sep 2023 10:45:31 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.14.0 Subject: Re: [MAINTAINERS/KERNEL SUMMIT] Trust and maintenance of file systems To: David Disseldorp , Dave Chinner Cc: Kent Overstreet , James Bottomley , Matthew Wilcox , Christoph Hellwig , ksummit@lists.linux.dev, linux-fsdevel@vger.kernel.org, Hajime Tazaki , Octavian Purdila References: <8dd2f626f16b0fc863d6a71561196950da7e893f.camel@HansenPartnership.com> <20230909224230.3hm4rqln33qspmma@moria.home.lan> <20230911012914.xoeowcbruxxonw7u@moria.home.lan> <20230911153515.2a256856@echidna.fritz.box> Content-Language: en-US From: Bart Van Assche In-Reply-To: <20230911153515.2a256856@echidna.fritz.box> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On 9/11/23 06:35, David Disseldorp wrote: > The LKL block layer may also become useful for legacy storage support in > future, e.g. SCSI protocol obsolescence. There are probably more Linux devices using SCSI than NVMe. There are several billion Android phones in use. Modern Android phones use UFS storage. UFS is based on SCSI. There are already UFS devices available that support more than 300K IOPS and there are plans for improving performance further. Moving the SCSI stack to user space would have a very significant negative performance impact on Android devices. Bart.