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

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Message-ID: <493FFE5E.2000404@colorfullife.com>
Date:	Wed, 10 Dec 2008 18:37:34 +0100
From:	Manfred Spraul <manfred@...orfullife.com>
To:	Holger Hoffstaette <holger@...ards.de>,
	Stefan Richter <stefanr@...6.in-berlin.de>
CC:	linux-kernel@...r.kernel.org, stable@...nel.org
Subject: Re: Nasty regression from .27.7 to .27.8: idle samba goes crazy

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.


--
    Manfred

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