Excerpts from Michael Ellerman's message of January 21, 2021 10:50 pm:
> Nicholas Piggin writes:
>> Running softirqs enables interrupts, which can then end up recursing
>> into the irq soft-mask code we're adjusting, including replaying
>> interrupts itself, which might be theoretically
Nicholas Piggin writes:
> Running softirqs enables interrupts, which can then end up recursing
> into the irq soft-mask code we're adjusting, including replaying
> interrupts itself, which might be theoretically unbounded.
>
> This abridged trace shows how this can occur:
>
> ! NIP
On 20-Jan-2021, at 1:20 PM, Nicholas Piggin wrote:Running softirqs enables interrupts, which can then end up recursinginto the irq soft-mask code we're adjusting, including replayinginterrupts itself, which might be theoretically unbounded.This abridged trace shows how this can occur:! NIP
Running softirqs enables interrupts, which can then end up recursing
into the irq soft-mask code we're adjusting, including replaying
interrupts itself, which might be theoretically unbounded.
This abridged trace shows how this can occur:
! NIP replay_soft_interrupts
LR
