From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp2 ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by ms11 with LMTPS id QHmJOoBZQWDwMAAA0tVLHw (envelope-from ) for ; Thu, 04 Mar 2021 22:04:48 +0000 Received: from aspmx1.migadu.com ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp2 with LMTPS id 6HlJNoBZQWDfMAAAB5/wlQ (envelope-from ) for ; Thu, 04 Mar 2021 22:04:48 +0000 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by aspmx1.migadu.com (Postfix) with ESMTPS id 56DC324BBD for ; Thu, 4 Mar 2021 23:04:48 +0100 (CET) Received: from localhost ([::1]:41712 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lHw5O-0007ob-Vy for larch@yhetil.org; Thu, 04 Mar 2021 17:04:47 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:51412) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lHw2k-0004aW-Tq for bug-guix@gnu.org; Thu, 04 Mar 2021 17:02:04 -0500 Received: from debbugs.gnu.org ([209.51.188.43]:48990) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lHw2k-0001Jn-LU for bug-guix@gnu.org; Thu, 04 Mar 2021 17:02:02 -0500 Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1lHw2k-0000wG-IW for bug-guix@gnu.org; Thu, 04 Mar 2021 17:02:02 -0500 X-Loop: help-debbugs@gnu.org Subject: bug#46905: Add a note about ext4's dir_index to the manual Resent-From: Ludovic =?UTF-8?Q?Court=C3=A8s?= Original-Sender: "Debbugs-submit" Resent-CC: bug-guix@gnu.org Resent-Date: Thu, 04 Mar 2021 22:02:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 46905 X-GNU-PR-Package: guix X-GNU-PR-Keywords: To: Tobias Geerinckx-Rice Received: via spool by 46905-submit@debbugs.gnu.org id=B46905.16148952993574 (code B ref 46905); Thu, 04 Mar 2021 22:02:02 +0000 Received: (at 46905) by debbugs.gnu.org; 4 Mar 2021 22:01:39 +0000 Received: from localhost ([127.0.0.1]:60536 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1lHw2N-0000vZ-1t for submit@debbugs.gnu.org; Thu, 04 Mar 2021 17:01:39 -0500 Received: from eggs.gnu.org ([209.51.188.92]:33476) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1lHw2J-0000vF-F3 for 46905@debbugs.gnu.org; Thu, 04 Mar 2021 17:01:37 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]:43525) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lHw2D-00018P-D9; Thu, 04 Mar 2021 17:01:29 -0500 Received: from [2a01:e0a:1d:7270:af76:b9b:ca24:c465] (port=36468 helo=ribbon) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1lHw2C-0002Lf-EZ; Thu, 04 Mar 2021 17:01:29 -0500 From: Ludovic =?UTF-8?Q?Court=C3=A8s?= References: <87v9a89c8v.fsf@nckx> Date: Thu, 04 Mar 2021 23:01:26 +0100 In-Reply-To: <87v9a89c8v.fsf@nckx> (Tobias Geerinckx-Rice's message of "Wed, 03 Mar 2021 22:08:16 +0100") Message-ID: <87blbymvd5.fsf@gnu.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-guix@gnu.org List-Id: Bug reports for GNU Guix List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: 46905@debbugs.gnu.org Errors-To: bug-guix-bounces+larch=yhetil.org@gnu.org Sender: "bug-Guix" X-Migadu-Flow: FLOW_IN ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=yhetil.org; s=key1; t=1614895488; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding:resent-cc: resent-from:resent-sender:resent-message-id:in-reply-to:in-reply-to: references:references:list-id:list-help:list-unsubscribe: list-subscribe:list-post; bh=RuA48EpmdtKQ6SDHlmGPPCO94fCf78xUlzE5kJvH55Q=; b=mltKwbKpGIR7eiCYzJDgo6/g6MH1TzM1TFPZf9YO9Fd9B7/6lsU4Wse6p/fRNzEjxki+rv RUxWNWILfTfmoT04qxL1SWus/1eMEOMxQrZviC5uHdt14khBnqVAsbzzzyqDsbNeqcaqLm f016Ft3g+FR5Km7eV58/2lpck7S14J7AoJHTnfkJupuZvbizdNesiZxGVfuN+nDUgHjO/2 U4HdkduQ4siQxTYaboaNtu214OPtObbgqZLjy8mjje98kF4MMz7RZHEcT2Y4buoIj4Mcen M1GaUok8GslggEdeC57xNjQiKXS87yoE/YEYYK7/aLnP4Bb+CghcAq87Xxh3nA== ARC-Seal: i=1; s=key1; d=yhetil.org; t=1614895488; a=rsa-sha256; cv=none; b=rEeM96/M7lw+oq4i0UH7t65p9g6Ax3cz7IIPHXH2yTzAm5rveqoROsXpJkATUZvtmmBRlH yzzxmAFWZFOd/TID55/vZP35oUxefGD2JcnlgT9VRlR5uWojT/TRsym/7PtMtatbOsj8S4 tfrcVhmblcmIYbQpCcqjZlh2EpRn97Ka/HumY+H19LK3oC4d2EOxR40u7eu4kQMLWID8qN Hmcd64OmYf8zcybnD9EDnvvm5eps6zEI0pKI+9LEQSxx/nFktwVasUlw1UypgSB/rBZQFH 888xnxDL0p5jTLHKsSZ/l2pxNPmzXaiH+fPVOMvIAmdInx/1YJwt2zZB3K7KkA== ARC-Authentication-Results: i=1; aspmx1.migadu.com; dkim=none; spf=pass (aspmx1.migadu.com: domain of bug-guix-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=bug-guix-bounces@gnu.org X-Migadu-Spam-Score: -2.86 Authentication-Results: aspmx1.migadu.com; dkim=none; dmarc=pass (policy=none) header.from=gnu.org; spf=pass (aspmx1.migadu.com: domain of bug-guix-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=bug-guix-bounces@gnu.org X-Migadu-Queue-Id: 56DC324BBD X-Spam-Score: -2.86 X-Migadu-Scanner: scn0.migadu.com X-TUID: 1M8AtVOT4YMH Hi! Tobias Geerinckx-Rice skribis: > Mainly a reminder to myself to do so. > > Guix can break ext4, and more than once has, with a inscrutable error > message. We should document it explicitly. > > See . You wrote: --8<---------------cut here---------------start------------->8--- OK, that's the culprit (it's common: ext4 has a design flaw in that i= t hashes directory entries and... just dies when the hash table gets =E2=80=98full=E2=80=99). Try =E2=80=98tune2fs= -E "hash_alg=3Dtea" /dev/foo=E2=80=99 to select a different hash algo, or =E2=80=98tune2fs -O "^dir_index" /dev/foo=E2=80=99 to disable it completely= if that doesn't help. --8<---------------cut here---------------end--------------->8--- Really? I=E2=80=99ve almost always used =E2=80=98dir_index=E2=80=99 in my = Guix + NixOS days, and IIRC store accesses were much slower before that was a thing. On berlin, /gnu is a 37=C2=A0TiB file system with =E2=80=98dir_index=E2=80= =99 turned on and it works well. I don=E2=80=99t think we can claim there=E2=80=99s a design flaw. WDYT? Ludo=E2=80=99.