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Re: [lvs-users] Kernel 2.6.35 and 100% S.I. CPU Time

To: "LinuxVirtualServer.org users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: [lvs-users] Kernel 2.6.35 and 100% S.I. CPU Time
From: JL <lvs@xxxxxxxx>
Date: Tue, 14 Sep 2010 10:00:06 +0100
On 13 September 2010 22:17, Graeme Fowler <graeme@xxxxxxxxxxx> wrote:
> On Mon, 2010-09-13 at 22:13 +0100, JL wrote:
>> ...I am familiar with the scenario you are describing - where each
>> machine decides the other should handle the connection - but it is not
>> the situation that is occurring at the moment. This problem didn't
>> happen with the exact same setup under 2.6.27.45, and...
>
> Hrm.
>
> Then might I recommend an Occam's Roazor approach to this? Compile a
> number of kernels from the one which worked up to the one which doesn't.
> Reboot the backup; test; if it doesn't happen then you know the change
> cam later than the kernel you're running.
I intend to do that.

>> Thanks, but I don't think we have cracked it yet. (However, for
>> thoroughness, I will remove the fwmark rules on the backup, as you
>> suggested, and report back.)
>
> Not the fwmarks! For completeness I meant "clear out the IPVS rules on
> the backup but leave the modules loaded".

OK, tried that:
    IP Virtual Server version 1.2.1 (size=4096)
    Prot LocalAddress:Port Scheduler Flags
      -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
... And I can still trigger the problem.

If I remove the fwmark rules instead, I still get the problem.

>
> Graeme
>
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-- 
Jarrod Lowe

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