From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: with ECARTIS (v1.0.0; list xfs); Wed, 03 Oct 2007 17:39:52 -0700 (PDT) Received: from larry.melbourne.sgi.com (larry.melbourne.sgi.com [134.14.52.130]) by oss.sgi.com (8.12.11.20060308/8.12.10/SuSE Linux 0.7) with SMTP id l940diOS014885 for ; Wed, 3 Oct 2007 17:39:46 -0700 Date: Thu, 4 Oct 2007 10:39:35 +1000 From: David Chinner Subject: Re: 2.6.23-rc9-git1 hang with XFS Message-ID: <20071004003935.GC23367404@sgi.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: xfs-bounce@oss.sgi.com Errors-to: xfs-bounce@oss.sgi.com List-Id: xfs To: Alessandro Bono Cc: linux-xfs@oss.sgi.com On Wed, Oct 03, 2007 at 11:03:29PM +0200, Alessandro Bono wrote: > Hi all > > I'm testing 2.6.23-rc9-git1 on my old home server > Trying to reorganizer my xfs filesystem with xfs_fsr cause a sort of system > hang xfs_fsr is waiting for a direct I/O to complete. Other processes are waiting for the superblock I/O to compete (which is why writes are hanging), an dothers are waiting for iclog space to be freed up. I think something is holding off I/O completion, and this: > possible SYN flooding on port 4664. Sending cookies. > possible SYN flooding on port 4664. Sending cookies. > possible SYN flooding on port 4664. Sending cookies. > possible SYN flooding on port 4664. Sending cookies. > possible SYN flooding on port 4664. Sending cookies. indicates someone trying a DOS on your box. Perhaps it's succeeding by denying interrupt service to you disks? If you pull the network cable, does the system start to respond properly again? Cheers, Dave. -- Dave Chinner Principal Engineer SGI Australian Software Group