Re: 2.6.23-rc9-git1 hang with XFS

[Alessandro Bono <alessandro.bono@xxxxxxxxx>]

On Thursday 04 October 2007, David Chinner wrote:
> 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?

it's really difficult, my internet line is a normal adsl2 and this machine is 
really rock solid with ubuntu dapper kernel (uptime of several months and 
mldonkey, mlnet process, is always on)
also after reboot raid5 start resyncronizing disk and after 2 hours system 
ends this operation without any problem (mldonkey on)

>
> If you pull the network cable, does the system start to respond
> properly again?

I'll try this evening

Thanks 

>
> Cheers,
>
> Dave.



-- 
Cordiali saluti

Alessandro Bono