linux-kernel - Re: Nasty regression from .27.7 to .27.8: idle samba goes crazy

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Message-ID: <49419A14.50402@wizards.de>
Date:	Thu, 11 Dec 2008 23:54:12 +0100
From:	Holger Hoffstätte <holger@...ards.de>
To:	Manfred Spraul <manfred@...orfullife.com>
CC:	Stefan Richter <stefanr@...6.in-berlin.de>,
	linux-kernel@...r.kernel.org, stable@...nel.org
Subject: Re: Nasty regression from .27.7 to .27.8: idle samba goes crazy


Dear all -

Thanks for your efforts.

Manfred Spraul wrote:
> Chuck Ebbert wrote:
>> On Mon, 8 Dec 2008 23:22:46 +0100
>> Jan Rekorajski <baggins@...h.mimuw.edu.pl> wrote:
>>
>>  
>>> On Mon, 08 Dec 2008, Stefan Richter wrote:
>>>
>>>    
>>>>>>> On Monday, 8 of December 2008, Holger Hoffstaette wrote:
>>>>>>>            
>>>>>>>> The system is a generic old single-core P4 box with a single
>>>>>>>> SATA drive,
>>>>>>>> Gentoo userland and Samba is 3.0.33 (in async mode). The kernel
>>>>>>>> has no
>>>>>>>> patches or binary drivers.
>>>>>>>>               
>>>> Holger, it may be unrelated to the issue, but to be sure:  Which
>>>> network
>>>> card driver do you use?
>>>>       
>>> I think you can safely rule out NIC, I'm also seeing this behaviour on a
>>> brand new server with imap hanging in some busy-loop.
>>> Network card in my case:
>>> Broadcom Corporation NetXtreme II BCM5708 Gigabit Ethernet (rev 12)
>>>
>>> What I observer was one CPU doing 100% system work, and the number of
>>> timer interrupts went from 1k per second to 4k (for the whole system).
>>>
> Could you try the attached patch?
> It should fix the bug.

I just built 2.6.27.9-rc1 and disconnected the Windowz box several times.
For now smbd does not seem to go into a death spin any more, even though
as far as I can tell .9-rc1 does not contain Manfred'd latest patch. Not
sure what that means, if anything.

I'll keep running stable.9-rc1 and see what happens..

thanks all
Holger

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