Re: [Xen-users] Xen 4.12 DomU hang / freeze / stall under high network/disk load

[Tomas Mozes <hydrapolic@xxxxxxxxx>]

On Monday, February 17, 2020, Glen <glenbarney@xxxxxxxxx> wrote:
> Hi Sarah!
>
> On Mon, Feb 17, 2020 at 9:58 AM Sarah Newman <srn@xxxxxxxxx> wrote:
>> On 2/17/20 9:37 AM, Glen wrote:
>> > Under 4.12, my guests would crumple after 24-36 hours of this type of loading.
>> > Under 4.10, my guest has been up now for 68 hours and - after about 64
>> > hours, the above transfers *completed*.  This has never happened.  No
>> > guest under 4.12 has ever survived 4+ simultaneous transfers of 2.5TB
>> > of data since I encountered this problem.  They would all stall well
>> > before the transfers could complete.  In contrast, under 4.10, my same
>> > guest ran at (subjectively) about half the load average, and the
>> > transfers all completed, in their entirely, without any stalls.
>
>> 4.10 + which kernel version, just to confirm?
>
> Host:
> OpenSuse 15.0
> Linux 4.12.14-lp150.12.82-default x86_64
> Xen version 4.10.4_06-lp150.2.25
>
> Guest: (unchanged)
> OpenSuse 15.1
> Linux 4.12.14-lp151.28.36-default x86_64
>
> :-)
>
> Glen
>
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Just a quick note - no stall after switching to credit scheduler on xen 4.12 after 3 days. 

Tomas
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