From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=MAILING_LIST_MULTI, RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 14666 invoked from network); 13 Dec 2020 03:07:36 -0000 Received: from minnie.tuhs.org (45.79.103.53) by inbox.vuxu.org with ESMTPUTF8; 13 Dec 2020 03:07:36 -0000 Received: by minnie.tuhs.org (Postfix, from userid 112) id 85D4C9B954; Sun, 13 Dec 2020 13:07:30 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 5CD1593D38; Sun, 13 Dec 2020 13:07:19 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id A4BE293D38; Sun, 13 Dec 2020 13:07:17 +1000 (AEST) Received: from fourwinds.com (fourwinds.com [63.64.179.162]) by minnie.tuhs.org (Postfix) with ESMTPS id 48C8493D29 for ; Sun, 13 Dec 2020 13:07:16 +1000 (AEST) Received: from darkstar.fourwinds.com (localhost [127.0.0.1]) by fourwinds.com (8.15.2/8.15.2) with ESMTPS id 0BD37F0R2780526 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT) for ; Sat, 12 Dec 2020 19:07:15 -0800 Received: from darkstar.fourwinds.com (jon@localhost) by darkstar.fourwinds.com (8.15.2/8.15.2/Submit) with ESMTP id 0BD37F0U2780521 for ; Sat, 12 Dec 2020 19:07:15 -0800 Message-Id: <202012130307.0BD37F0U2780521@darkstar.fourwinds.com> From: Jon Steinhart To: The Eunuchs Hysterical Society In-reply-to: <20201213025831.GF575698@mit.edu> References: <20201209165854.GK52960@mit.edu> <20201213010743.GE575698@mit.edu> <202012130156.0BD1ufbY2698480@darkstar.fourwinds.com> <20201213025831.GF575698@mit.edu> Comments: In-reply-to "Theodore Y. Ts'o" message dated "Sat, 12 Dec 2020 21:58:31 -0500." MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <2780519.1607828834.1@darkstar.fourwinds.com> Date: Sat, 12 Dec 2020 19:07:15 -0800 X-JON-SPAM: local delivery Subject: Re: [TUHS] Were cron and at done at the same time? Or one before the other? X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" Theodore Y. Ts'o writes: > > And, if you can actually make a better file system, please go for it, you're > > a better person than me. I've looked that that code, and it's huge, has no > > clearly defined entry and exit points, and is undocumented. While I've been > > too busy to deal with stuff, I found some minor bugs and a possible big > > performance improvement just from trying to read the code. > > Did you report those bugs and potential performance improements? > Feedback is always gratefully accepted. > > As far as documentation is concerned, it's not perfect, but it's > certainly not completely undocumented: > > https://www.kernel.org/doc/html/latest/filesystems/index.html > https://www.kernel.org/doc/html/latest/filesystems/ext4/index.html > > Again, I suspect that you're remember the past with rose-colored > classes. BSD FFS's fsck (or for that matter, fsck's from any of the > commercial Unix systems that I was able to see soures for) didn't have > regression test suites. Ext2/3/4 was one of the first file system > fsck's that I'm aware with that was created with a regression test > suite from the very beginning. And all of the major file systems in > Linux are developed using a very large library of functional and > stress tests: No, not yet, because I haven't had the time to test. And sorry, I wasn't clear. I wasn't talking about the code for a particular filesystem, I was talking about the generic filesystem code. Jon