Re: [RFC PATCH 14/16] irq: Add support for core-wide protection of IRQ and softirq

[Aubrey Li]

On Fri, Jul 10, 2020 at 9:36 PM Vineeth Remanan Pillai
<vpillai@xxxxxxxxxxxxxxxx> wrote:
>
> Hi Aubrey,
>
> On Fri, Jul 10, 2020 at 8:19 AM Li, Aubrey <aubrey.li@xxxxxxxxxxxxxxx> wrote:
> >
> > Hi Joel/Vineeth,
> > [...]
> > The problem is gone when we reverted this patch. We are running multiple
> > uperf threads(equal to cpu number) in a cgroup with coresched enabled.
> > This is 100% reproducible on our side.
> >
> > Just wonder if anything already known before we dig into it.
> >
> Thanks for reporting this. We haven't seen any lockups like this
> in our testing yet.

This is replicable on a bare metal machine. We tried to reproduce
on a 8-cpus KVM vm but failed.

> Could you please add more information on how to reproduce this?
> Was it a simple uperf run without any options or was it running any
> specific kind of network test?

I put our scripts at here:
https://github.com/aubreyli/uperf

>
> We shall also try to reproduce this and investigate.

I'll try to see if I can narrow down the test case and grab some logs
next week.

Thanks,
-Aubrey