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=-1.1 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,MAILING_LIST_MULTI autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 15209 invoked from network); 9 Mar 2023 17:01:58 -0000 Received: from minnie.tuhs.org (2600:3c01:e000:146::1) by inbox.vuxu.org with ESMTPUTF8; 9 Mar 2023 17:01:58 -0000 Received: from minnie.tuhs.org (localhost [IPv6:::1]) by minnie.tuhs.org (Postfix) with ESMTP id 01697412C6; Fri, 10 Mar 2023 03:01:50 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tuhs.org; s=dkim; t=1678381310; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:mime-version:mime-version: content-type:content-type:in-reply-to:in-reply-to: references:references:list-id:list-help:list-owner:list-unsubscribe: list-subscribe:list-post; bh=l/ggTgatBgEdYvVk1tOwE5tT7uk0atuUnVlHNpYjbBI=; b=vhpkyYfvVPnwAc4Y8/5kvLjXUo7gJDR2GS+qqyqg+kPo3srhearyqrc/zcoxR7z3cw9QRc WPsXFJCsUmEnwzmk9wskK1PYa36TOuRDlTBKvyR7KHKuLJ2SOXI/yimIS1dgii85YK4+U7 hgnzotDphjejzxs042s8JSEQ3NJclY8= Received: from barsoom.hamartun.priv.no (barsoom.hamartun.priv.no [193.71.27.8]) by minnie.tuhs.org (Postfix) with ESMTPS id 3FFDC412A2 for ; Fri, 10 Mar 2023 03:01:43 +1000 (AEST) Received: from thuvia.hamartun.priv.no (thuvia.hamartun.priv.no [IPv6:2001:8c0:c904:10::7]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by barsoom.hamartun.priv.no (Postfix) with ESMTPS id 4PXb7R126jzG2YP for ; Thu, 9 Mar 2023 18:01:39 +0100 (CET) Authentication-Results: barsoom.hamartun.priv.no; arc=none smtp.remote-ip=2001:8c0:c904:10::7 ARC-Seal: i=1; a=rsa-sha256; d=hamartun.priv.no; s=barsoom; t=1678381299; cv=none; b=fMtaPrkoF23dV/y9niVeGbNAHkR3YXwDjQBdVwodHcV+NiOM9iA4SSK6hu3TEy7HLv+mwsMVjUVNgc8xqj3uQtR4LjggQaguXTvuKXKr4wKWS6uyA66M0yg/x62wHIh9kdo/0GgHaiSUTxMDOLQOou4kNyulqvo9HCvbB/pnPcM= ARC-Message-Signature: i=1; a=rsa-sha256; d=hamartun.priv.no; s=barsoom; t=1678381299; c=relaxed/simple; bh=B+deOGsolkOLqq4cdfkAAx1fkZPMGyjeDZdmbfkly6A=; h=DKIM-Signature:Received:From:To:Subject:References:Date: In-Reply-To:Message-ID:User-Agent:MIME-Version:Content-Type; b=owDuljvUmG/epXMpZ4hMGyXbny22wQ4dzrLo58D3AIRK954+ib6fMtLQgSwLuMAALM7/KFVc9tUTnueseutERYT0maIemT1hXcZx3Eg/lC+v2Py1u1FPvex+V8ZdkhDlJEruZ9R1o/2fPLD+xano4LzfAFISP94nfQ3u0o0MTFA= ARC-Authentication-Results: i=1; barsoom.hamartun.priv.no DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=hamartun.priv.no; s=20200727; t=1678381299; bh=l/ggTgatBgEdYvVk1tOwE5tT7uk0atuUnVlHNpYjbBI=; h=From:To:Subject:References:Date:In-Reply-To:From:To:Cc:Subject: Date; b=EdpWlRbaENFE4WEyOD0resdQ4lF6YaRJIH/nL2L2TxwjXq77xfZM1VizpGzc7krZa dPhxF3EQYsuLOl22Lo6Xzm+uBUmrEW89SltIzKDsfLgDIoxWImHxjdWMkTtZTqHNnC 2A0uLZYtuy/Vi9x+IgDVldeJAWe3GFIPM3hVsTcWCyLwfElnuaonIJkCkBjFlAvRZQ +wDhYN0omelRvV7jJEqp9JYGJpNa9GI9M4O1MszM0z5WkqVhqiJ+o6sIVcRVITfmmD LD06bPPEVxGpimsGBVnErXc5kMjeGobj7zieIYCebhD+6jeghaVNbf4je7Cdj648Xx UwqddYMYoUglQ== Received: by thuvia.hamartun.priv.no (Postfix, from userid 501) id 4137F4DF37; Thu, 9 Mar 2023 18:01:38 +0100 (CET) To: TUHS@tuhs.org References: <20230308131008.0C2D018C07B@mercury.lcs.mit.edu> Date: Thu, 09 Mar 2023 18:01:38 +0100 In-Reply-To: <20230308131008.0C2D018C07B@mercury.lcs.mit.edu> (Noel Chiappa's message of "Wed, 8 Mar 2023 08:10:08 -0500 (EST)") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.3 (berkeley-unix) MIME-Version: 1.0 Content-Type: text/plain Message-ID-Hash: ILFZVBAGM3ITAJ3EJDZPOF62LI6XS65C X-Message-ID-Hash: ILFZVBAGM3ITAJ3EJDZPOF62LI6XS65C X-MailFrom: tih@hamartun.priv.no X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.6b1 Precedence: list Subject: [TUHS] Re: 'Huge' file support removed from PWB1 List-Id: The Unix Heritage Society mailing list Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: Tom Ivar Helbekkmo via TUHS Reply-To: Tom Ivar Helbekkmo Noel Chiappa writes: > In PWB1, support for 'huge' files appears to have been removed. They did make various changes to the system to protect against resource exhaustion in what was a genuine production multi-user facility, and might possibly have made such a change to ensure that a runaway process couldn't write a file more than a megabyte in size. It's not mentioned in the PWB article in the special UNIX issue of the Bell System Technical Journal, though, and that article does describe various changes they'd made, explaining how and why. However: PWB grew out of Research, side by side with it, evaluating and adopting changes along the way. They aimed to stay mostly in synch, but chose to keep and maintain a number of differences. Maybe they started their work before the "huge" file support was introduced, and then simply did not include that change? It's a backward incompatible change (at least if you have at least one file that already uses the last indirect block of its inode), and they might have decided to cross that bridge if and when they ever got to it. -tih -- Most people who graduate with CS degrees don't understand the significance of Lisp. Lisp is the most important idea in computer science. --Alan Kay