[Samba] Samba freezes server when writing 50MB MS Word document (sometimes)

Volker Lendecke Volker.Lendecke at SerNet.DE
Sat Jul 11 01:51:20 MDT 2009

On Sat, Jul 11, 2009 at 09:14:21AM +0200, Sebastian Scholz wrote:
> Hi list
> for a couple of days we have the problem that our samba pdc server (ubuntu
> 8.04
> LTS [kernel 2.6.24-24] with 3.0.28a samba package) freezes sometimes when
> someone saves a specific word document (about 50MB) from MS Word. It's not
> always the same person. Saving the document - as nearly any huge MS Office
> document - takes some time, about one minute (guessed).
> First the server gets really slow. Some user programs on clients fail to
> write.
> The CPU usage of the smb process of the user writing the document goes up to
> nearly 100%. After a while it's not possible to log on to the server - even
> locally. It asks for a password but there won't be a prompt. Sometimes there
> is
> nothing on the console/screen. Hitting a button does not change a thing.
> It's
> not possible to kill the process. Another thing is that there are a couple
> of
> smbd processes for one user (see attached user smbd log).

If it's not possible to kill smbd, even with -9, this really
sounds like a kernel problem.

Look for example at https://bugs.launchpad.net/linux/+bug/254326

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