On Tue, Mar 05 2024 at 18:57, Bitao Hu wrote:
> On 2024/3/4 22:24, Thomas Gleixner wrote:
> "GENERIC_IRQ_STAT_SNAPSHOT" visible to the user. However, after
> analyzing the previous emails, it seems that what you were actually
> proposing was to directly disable "GENERIC_IRQ_STAT_SNAPSHOT" when
> "SOFTLOCKUP_DETECTOR_INTR_STORM" is not enabled, as a way to save
> memory. If my current understanding is correct, then the code for that
> part would look something like the following.
Correct.
> diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig
> index 2531f3496ab6..a28e5ac5fc79 100644
> --- a/kernel/irq/Kconfig
> +++ b/kernel/irq/Kconfig
> @@ -108,6 +108,10 @@ config GENERIC_IRQ_MATRIX_ALLOCATOR
> config GENERIC_IRQ_RESERVATION_MODE
> bool
>
> +# Snapshot for interrupt statistics
> +config GENERIC_IRQ_STAT_SNAPSHOT
> + bool
> +
> # Support forced irq threading
> config IRQ_FORCED_THREADING
> bool
> diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
> index 49f652674bd8..899b69fcb598 100644
> --- a/lib/Kconfig.debug
> +++ b/lib/Kconfig.debug
> @@ -1032,6 +1032,7 @@ config SOFTLOCKUP_DETECTOR
> config SOFTLOCKUP_DETECTOR_INTR_STORM
> bool "Detect Interrupt Storm in Soft Lockups"
> depends on SOFTLOCKUP_DETECTOR && IRQ_TIME_ACCOUNTING
> + select GENERIC_IRQ_STAT_SNAPSHOT
This goes into the patch which adds the lockup detector parts.
Thanks,
tglx
