From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752925Ab2GNKRw (ORCPT ); Sat, 14 Jul 2012 06:17:52 -0400 Received: from truschnigg.info ([84.200.12.177]:34012 "EHLO truschnigg.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751931Ab2GNKRu (ORCPT ); Sat, 14 Jul 2012 06:17:50 -0400 Date: Sat, 14 Jul 2012 12:13:21 +0200 From: Johannes Truschnigg To: Willy Tarreau Cc: Eric Dumazet , Hillf Danton , linux-kernel@vger.kernel.org, Linux-Netdev Subject: Re: PROBLEM: Silent data corruption when using sendfile() Message-ID: <20120714101321.GA26329@vault.local> References: <20120713171835.GA26052@vault.local> <1342254042.3265.9017.camel@edumazet-glaptop> <20120714083136.GO16256@1wt.eu> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="G4iJoqBmSsgzjUCe" Content-Disposition: inline In-Reply-To: <20120714083136.GO16256@1wt.eu> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --G4iJoqBmSsgzjUCe Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, Jul 14, 2012 at 10:31:36AM +0200, Willy Tarreau wrote: > > Please Johannes could you try latest kernel tree ? >=20 > It would be useful, especially given the amount of changes you performed > in this area in latest version, it could be very possible that this new > bug got fixed as a side effect ! I upgraded to 3.4.4 (identical config as the 3.4.0 build I've been running) and what can I say - the problem really seems to have disappeared. I perfor= med about 3700 iterations of my previos tests over the night, and the data alwa= ys turned out to be OK, not a single byte turned out kaput! I wish I would have tested that earlier, and spared you the noise... well, maybe someone who runs into a similar problem in the future will have this discovery save her/him some time and headaches and make her/him just upgrade kernels :) Thanks a lot for your polite and quick responses! --=20 with best regards: - Johannes Truschnigg ( johannes@truschnigg.info ) www: http://johannes.truschnigg.info/ phone: +43 650 2 133337 xmpp: johannes@truschnigg.info Please do not bother me with HTML-email or attachments. Thank you. --G4iJoqBmSsgzjUCe Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iEYEARECAAYFAlABRkEACgkQnnUApj8OcoLtmQCfcdn0Om7SnCUO6R2WhXV/E0EC Z+EAoJe3gQApITV72Md9SBrvQgghjHQ+ =IaNX -----END PGP SIGNATURE----- --G4iJoqBmSsgzjUCe--