Re: [PATCH 1/3] powerpc/64s/interrupt: Fix decrementer storm

2022-03-20 Thread Michael Ellerman
On Tue, 25 Jan 2022 00:39:28 +1000, Nicholas Piggin wrote: > The decrementer exception can fail to be cleared when the interrupt > returns in the case where the decrementer wraps with the next timer > still beyond decrementer_max. This results in a decrementer interrupt > storm. This is triggerable

Re: (subset) [PATCH 1/3] powerpc/64s/interrupt: Fix decrementer storm

2022-01-29 Thread Michael Ellerman
On Tue, 25 Jan 2022 00:39:28 +1000, Nicholas Piggin wrote: > The decrementer exception can fail to be cleared when the interrupt > returns in the case where the decrementer wraps with the next timer > still beyond decrementer_max. This results in a decrementer interrupt > storm. This is triggerable

[PATCH 1/3] powerpc/64s/interrupt: Fix decrementer storm

2022-01-24 Thread Nicholas Piggin
The decrementer exception can fail to be cleared when the interrupt returns in the case where the decrementer wraps with the next timer still beyond decrementer_max. This results in a decrementer interrupt storm. This is triggerable with small decrementer system with hard and soft watchdogs disable