Re: XP machine freeze

[Brad Campbell <lists2009@fnarfbargle.com>]

On 31/03/15 14:29, Saso Slavicic wrote:
>> From: Brad Campbell
>> Sent: Tuesday, March 31, 2015 2:28 AM
>>
>>
>> If someone could give me some hard tests to do along the lines of what
>> Saso is up to I could probably get that done faster. With the right
>> bad kernel I can reproduce this lockup in a matter of hours.
> Hi,
>
> My machine usually (but not always) locks during backup. At around 3AM, a
> samba machine (a kvm machine on the same server actually) cifs mounts C$ and
> starts copying files off of it. The last stacktrace also shows network code.
> Is your machine actively working over network (sharing files)?
>
Better than that, it's recording h264 rtsp streams from 3 CCTV cameras, 
so there is a constant network load of about 1.5-2MB/s (bytes not bits).
Come to think of it, out of the 3 XP VM's I have that are an identical 
config and actually come from the same qcow2 base image this is the one 
that hits the network hard. The other 2 hardly touch the network.

virtio network interface. I can get it to lock up in hours with the 
right kernel, and repeat lockups after unlocking it with virt-viewer are 
usually less than an hour at most.

My issue is my first bisect proved to be inconclusive, and the second 
one is about 3 steps from done, but there are no kvm commits in the 
current set under investigation.

I *know* that 3.15.6 was good as I ran that kernel for months, it all 
started when I upgraded to a 3.18 and I think I've narrowed it down, but 
like I said the bisects are just not falling out as plausible, and at 5 
days for a good and up to 24 hours for a bad it's slow going.

I'll finish this bisect and then have a crack at the good/bad range 
suggested by Paolo. The issue is being a production box I have to 
schedule the re-boots.

I'm just not sure bisection is the right answer to tracking this down. I 
just don't have the background to know what to poke to try and debug 
this any other way.

Regards,
Brad

-- 
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