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 X-Spam-Level: X-Spam-Status: No, score=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B241CC433DF for ; Thu, 2 Jul 2020 21:16:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 900CE2070C for ; Thu, 2 Jul 2020 21:16:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726081AbgGBVQd (ORCPT ); Thu, 2 Jul 2020 17:16:33 -0400 Received: from jabberwock.ucw.cz ([46.255.230.98]:41800 "EHLO jabberwock.ucw.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725937AbgGBVQc (ORCPT ); Thu, 2 Jul 2020 17:16:32 -0400 Received: by jabberwock.ucw.cz (Postfix, from userid 1017) id 5D47B1C0C0C; Thu, 2 Jul 2020 23:16:31 +0200 (CEST) Date: Thu, 2 Jul 2020 23:16:29 +0200 From: Pavel Machek To: Sebastian Hyrwall Cc: linux-kernel@vger.kernel.org Subject: Re: BTRFS/EXT4 Data Corruption Message-ID: <20200702211629.GA5787@amd> References: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="3V7upXqbjpZ4EhLz" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --3V7upXqbjpZ4EhLz Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi! > After alot of fiddling around it turned out that the problem goes away if > doing "cp --sparse=3Dnever" > when copying the files. This would to me exclude any hardware errors and > feels more like something > deeper inside the kernel. If files contain random data, they are never sparse. It is strange that sparse=3Dnever would make any difference. > The box runs Kernel 3.10.105. Version >4 seems unaffected (not 100% > confirmed, too few testboxes). I'm afraid relevant developers will not be willing to debug 3.10 kernel. Best regards, Pavel --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --3V7upXqbjpZ4EhLz Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAl7+Tq0ACgkQMOfwapXb+vLpNACgvsXmGNyYMHqZkrRJDMMhU7ze fVcAniCnwvMcrwbFEaMTyHplPoi7X5JO =PKPz -----END PGP SIGNATURE----- --3V7upXqbjpZ4EhLz--