From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752586Ab1GUJTh (ORCPT ); Thu, 21 Jul 2011 05:19:37 -0400 Received: from acheron.ifi.lmu.de ([129.187.214.135]:60119 "EHLO acheron.ifi.lmu.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752378Ab1GUJTe (ORCPT ); Thu, 21 Jul 2011 05:19:34 -0400 From: Michael Brade To: linux-kernel@vger.kernel.org Subject: 2.6.39, 3.0.0-rc7+: complete system freeze with rsync on big directory Date: Thu, 21 Jul 2011 11:19:15 +0200 User-Agent: KMail/1.9.10 (enterprise35 0.20100827.1168748) Organization: =?iso-8859-1?q?Ludwig-Maximilians-Universit=E4t?= =?iso-8859-1?q?_M=FCnchen?= MIME-Version: 1.0 Content-Type: Text/Plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <201107211119.15496.brade@informatik.uni-muenchen.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, this is perfectly reproducible: with vanilla 2.6.39.x and 3.0.0 from yesterday's git my system completely freezes after a minute or so when I do rsync -cavSH -n /source/ /dest/ Watching htop, it freezes only after the caches are full but not immediately when the caches are full. No Alt-SysRq-magic is working anymore, nothing responds at all after the freeze. This is on tty1, no X server running. Note the -n which means dry run. I also mounted both directories read-only, so it's not the write commands. I am using XFS on both directories, one is mounted with iscsi, the other is local and encrypted with loop-aes. The directory size is >20 GB, 4000-6000 files. I first noticed it when a cp -a /source /dest froze the system. When I go back to 2.6.37.6 it works fine. I didn't try 2.6.38 yet. I am running this on a Dell Vostro, amd64, 6 GB RAM, 8x Intel Core i7 CPU Q 740 @ 1.73GHz. Any ideas how to debug this despite the freeze? Do you need my kernel config? Do you need any other info? Please CC me. thanks, Michael