Hi Julien,
On 2019/4/2 22:00, Julien Thierry wrote:
I meet this issue by coincidence before too.
> I finally found out what happens.
>
> When using interrupt priority masking, at the begining of
> gic_handle_irq(), we are in this awkward state where we still have the I
> bit set and PMR unmasked
Hi,
On 29/03/2019 15:02, Zenghui Yu wrote:
> Hi Marc,
>
> On 2019/3/29 21:58, Marc Zyngier wrote:
>> Hi Zenghui,
>>
>> On 29/03/2019 13:23, Zenghui Yu wrote:
>>> Enable pseudo NMI together with function_graph tracer, will lead
>>> the system to a hang. This is easy to reproduce,
>>>
>>> 1) Set
On Fri, Mar 29, 2019 at 11:46 PM Steven Rostedt wrote:
>
> On Fri, 29 Mar 2019 23:35:59 +0800
> Zenghui Yu wrote:
>
> > Hi Steven,
> >
> > On 2019/3/29 22:53, Steven Rostedt wrote:
> > > On Fri, 29 Mar 2019 13:58:40 +
> > > Marc Zyngier wrote:
> > >
> > >> On the other hand, if you can gener
On Fri, 29 Mar 2019 23:35:59 +0800
Zenghui Yu wrote:
> Hi Steven,
>
> On 2019/3/29 22:53, Steven Rostedt wrote:
> > On Fri, 29 Mar 2019 13:58:40 +
> > Marc Zyngier wrote:
> >
> >> On the other hand, if you can generate pseudo-NMIs, you could end-up
> >> tracing gic_handle_irq whilst bein
Hi Steven,
On 2019/3/29 22:53, Steven Rostedt wrote:
On Fri, 29 Mar 2019 13:58:40 +
Marc Zyngier wrote:
On the other hand, if you can generate pseudo-NMIs, you could end-up
tracing gic_handle_irq whilst being inside the tracing code with
interrupts being notionally disabled (and that coul
Hi Marc,
On 2019/3/29 21:58, Marc Zyngier wrote:
Hi Zenghui,
On 29/03/2019 13:23, Zenghui Yu wrote:
Enable pseudo NMI together with function_graph tracer, will lead
the system to a hang. This is easy to reproduce,
1) Set "irqchip.gicv3_pseudo_nmi=1" on the kernel command line
2) echo fu
On Fri, 29 Mar 2019 13:58:40 +
Marc Zyngier wrote:
> On the other hand, if you can generate pseudo-NMIs, you could end-up
> tracing gic_handle_irq whilst being inside the tracing code with
> interrupts being notionally disabled (and that could be pretty bad).
Actually, that should still be s
Hi Zenghui,
On 29/03/2019 13:23, Zenghui Yu wrote:
> Enable pseudo NMI together with function_graph tracer, will lead
> the system to a hang. This is easy to reproduce,
>
> 1) Set "irqchip.gicv3_pseudo_nmi=1" on the kernel command line
> 2) echo function_graph > /sys/kernel/debug/tracing/curr
Enable pseudo NMI together with function_graph tracer, will lead
the system to a hang. This is easy to reproduce,
1) Set "irqchip.gicv3_pseudo_nmi=1" on the kernel command line
2) echo function_graph > /sys/kernel/debug/tracing/current_tracer
This patch (RFC) set gic_handle_irq() as notrace a
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