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Re: ipvs_syncmaster brings cpu to 100%

To: liuk001@xxxxxxxxx, <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: ipvs_syncmaster brings cpu to 100%
From: Horms <horms@xxxxxxxxxxxx>
Date: Thu, 15 Sep 2005 20:35:00 +0900
On Thu, Sep 15, 2005 at 01:09:00PM +0200, Luca Maranzano wrote:
> Just another curiosity:
> 
> debld1:~# ps aux|grep ipvs
> root      3748  0.0  0.0      0     0 ?        D    12:09   0:00
> [ipvs_syncmaster]
> root      3757  0.0  0.0      0     0 ?        D    12:09   0:00
> [ipvs_syncbackup]
> 
> Note the D status, i.e. Uninterruptible sleep (usually IO).
> However I'm able to stop both the processes without any problem.

The problem is almost certainly in the way that the
daemons are sleeping, as you mentioned very early on in this thread.
The curious thing is, why I can't reproduce this on a similar
CPU (though non-Xeon, perhaps it is completely different) with 
the same kernel.

Could you hunt around on netdev and lkml to see if there
is any mention of problems like this in other code?

-- 
Horms

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