On Fri, Jun 25, 2021 at 12:16:52PM +0200, Peter Zijlstra wrote:
> You mean: CONFIG_PREEMPTION=n, what about CONFIG_PREEMPT_COUNT?
>
> Because if both are =n, then I don't see how that warning could trigger.
> in_atomic_preempt_off() would then result in prempt_count() == 0, and
> per the print
On Fri, Jun 25, 2021 at 02:23:16PM +0530, Bharata B Rao wrote:
> On Fri, Jun 25, 2021 at 09:28:09AM +0200, Peter Zijlstra wrote:
> > On Fri, Jun 25, 2021 at 11:16:08AM +0530, Srikar Dronamraju wrote:
> > > * Bharata B Rao [2021-06-24 21:25:09]:
> > >
> > > > A PowerPC KVM guest gets the
On 25/06/21 09:28, Peter Zijlstra wrote:
> On Fri, Jun 25, 2021 at 11:16:08AM +0530, Srikar Dronamraju wrote:
>> Bharata,
>>
>> I think the regression is due to Commit f1a0a376ca0c ("sched/core:
>> Initialize the idle task with preemption disabled")
>
> So that extra preempt_disable() that got
On Fri, Jun 25, 2021 at 09:28:09AM +0200, Peter Zijlstra wrote:
> On Fri, Jun 25, 2021 at 11:16:08AM +0530, Srikar Dronamraju wrote:
> > * Bharata B Rao [2021-06-24 21:25:09]:
> >
> > > A PowerPC KVM guest gets the following BUG message when booting
> > > linux-next-20210623:
> > >
> > > smp:
On Fri, Jun 25, 2021 at 11:16:08AM +0530, Srikar Dronamraju wrote:
> * Bharata B Rao [2021-06-24 21:25:09]:
>
> > A PowerPC KVM guest gets the following BUG message when booting
> > linux-next-20210623:
> >
> > smp: Bringing up secondary CPUs ...
> > BUG: scheduling while atomic:
On Fri, Jun 25, 2021 at 11:16:08AM +0530, Srikar Dronamraju wrote:
> * Bharata B Rao [2021-06-24 21:25:09]:
>
> > A PowerPC KVM guest gets the following BUG message when booting
> > linux-next-20210623:
> >
> > smp: Bringing up secondary CPUs ...
> > BUG: scheduling while atomic:
* Bharata B Rao [2021-06-24 21:25:09]:
> A PowerPC KVM guest gets the following BUG message when booting
> linux-next-20210623:
>
> smp: Bringing up secondary CPUs ...
> BUG: scheduling while atomic: swapper/1/0/0x
> no locks held by swapper/1/0.
> Modules linked in:
> CPU: 1 PID: 0
Hi,
A PowerPC KVM guest gets the following BUG message when booting
linux-next-20210623:
smp: Bringing up secondary CPUs ...
BUG: scheduling while atomic: swapper/1/0/0x
no locks held by swapper/1/0.
Modules linked in:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.13.0-rc7-next-20210623
