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Old 05-24-2011, 10:23 PM
"zongo saiba"
 
Default Kernel Panics Ubuntu Server 11.04 and Samba

Hi* Guys,
*
I have been running Ubuntu Server 11.04 for a couple of weeks with a Samba server and it is running great. The other day a client win7 tried to do a backup to the allocated Samba share and the server kernel-panicked on me.
Since then, every single time win7 clients are trying to do backups on allocated shares through Samba protocol, the server kernel-panicked and I have to reboot it.
The only reason I found in the logs for the KP :” kernel panic - not syncing: fatal exception in interrupt”.
I immediately tested my ram with memtest-86 and all is ok
I mounted two external usb drives on the shares and tried to run the backups on the usb drives and the issue is identical. The server KP every single time.
I then run HDD test on both external USB drives and internal drive of the server and all is ok.
I have searched google for an answer but to* no avail. All the posts referred back to a potential hardware issue on the server. Hardware wise, my server has no issues.

Any help is much appreciated on sorting the issue as I have no idea on where to look for a solution.
*
Kind Regards,

Zongo
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Old 05-25-2011, 07:38 AM
Alvin
 
Default Kernel Panics Ubuntu Server 11.04 and Samba

On Wednesday 25 May 2011 00:23:22 zongo saiba wrote:
> Hi Guys,
>
> I have been running Ubuntu Server 11.04 for a couple of weeks with a Samba
> server and it is running great. The other day a client win7 tried to do a
> backup to the allocated Samba share and the server kernel-panicked on me.
>
> Since then, every single time win7 clients are trying to do backups on
> allocated shares through Samba protocol, the server kernel-panicked and I
> have to reboot it.
>
> The only reason I found in the logs for the KP :" kernel panic - not
> syncing: fatal exception in interrupt".
>
> I immediately tested my ram with memtest-86 and all is ok
>
> I mounted two external usb drives on the shares and tried to run the
> backups on the usb drives and the issue is identical. The server KP every
> single time.
>
> I then run HDD test on both external USB drives and internal drive of the
> server and all is ok.
>
> I have searched google for an answer but to no avail. All the posts
> referred back to a potential hardware issue on the server. Hardware wise,
> my server has no issues.
>
> Any help is much appreciated on sorting the issue as I have no idea on
> where to look for a solution.

I've given up on using Ubuntu as a file server solution. It can't handle high
disk I/O. I'd still like to know where the problem lies though.

Have you only been testing with samba? You could try installing rsync[1].
(deltacopy) on Windows and copy a large amount of data over to the Ubuntu
server. Make sure you can copy at high speed.

Do you have more information about your system?
- What's the memory usage during a copy?
- Do you use LVM? Do you have snapshots. (snapshots would explain the issue)
- Are there any more messages in /var/log/kern.log?

[1] https://bugs.launchpad.net/bugs/750359
Kernel panics under load

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Old 05-25-2011, 02:19 PM
Serge Hallyn
 
Default Kernel Panics Ubuntu Server 11.04 and Samba

Quoting zongo saiba (zongosaiba@gmail.com):
> Any help is much appreciated on sorting the issue as I have no idea on where
> to look for a solution.

Hi Zongo,

would you mind opening a bug for this on launchpad? Ideally you would do
'ubuntu-bug samba', but if you create a bug by hand by going to
https://launchpad.net/ubuntu/+source/samba and clicking 'report a bug', we'll
just ask you for relevant info manually.

thanks,
-serge

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Old 05-26-2011, 11:06 PM
"zongo saiba"
 
Default Kernel Panics Ubuntu Server 11.04 and Samba

Looks like the bug is not with samba but more with my NIC r8169
Won't be filing a bug with samba

https://bugzilla.kernel.org/show_bug.cgi?id=32962


-----Original Message-----
From: Serge Hallyn [mailto:serge.hallyn@canonical.com]
Sent: 25 May 2011 15:19
To: zongo saiba
Cc: ubuntu-server@lists.ubuntu.com
Subject: Re: Kernel Panics Ubuntu Server 11.04 and Samba

Quoting zongo saiba (zongosaiba@gmail.com):
> Any help is much appreciated on sorting the issue as I have no idea on
> where to look for a solution.

Hi Zongo,

would you mind opening a bug for this on launchpad? Ideally you would do
'ubuntu-bug samba', but if you create a bug by hand by going to
https://launchpad.net/ubuntu/+source/samba and clicking 'report a bug',
we'll just ask you for relevant info manually.

thanks,
-serge


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