Alexandre Chartre writes:
> On 5/5/20 3:53 PM, Thomas Gleixner wrote:
>> The pagefault handler cannot use the regular idtentry_enter() because on
>> that invokes rcu_irq_enter() the pagefault was caused in the kernel.
>
> I am struggling to understand this part of the sentence: "because on
> that
On Mon, May 11, 2020 at 03:53:17PM +0200, Alexandre Chartre wrote:
>
> On 5/5/20 3:53 PM, Thomas Gleixner wrote:
> > The pagefault handler cannot use the regular idtentry_enter() because on
> > that invokes rcu_irq_enter() the pagefault was caused in the kernel.
>
> I am struggling to understand
On 5/5/20 3:53 PM, Thomas Gleixner wrote:
The pagefault handler cannot use the regular idtentry_enter() because on
that invokes rcu_irq_enter() the pagefault was caused in the kernel.
I am struggling to understand this part of the sentence: "because on
that invokes rcu_irq_enter() the
The pagefault handler cannot use the regular idtentry_enter() because on
that invokes rcu_irq_enter() the pagefault was caused in the kernel. Not a
problem per se, but kernel side page faults can schedule which is not
possible without invoking rcu_irq_exit().
Adding rcu_irq_exit() and a matching
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