Re: [PATCH] rcu: Add BOOTPARAM_RCU_STALL_PANIC Kconfig option

[Breno Leitao]

On Fri, Mar 13, 2026 at 09:56:49AM -0700, Gustavo Luiz Duarte wrote:
> Add a Kconfig option to set the default value of the
> kernel.panic_on_rcu_stall sysctl, allowing the kernel to be built
> with panic-on-RCU-stall enabled by default.
> 
> This is useful for high-availability systems that require automatic
> recovery (via panic_timeout) when a CPU stall is detected, without
> needing userspace to configure the sysctl at boot.
> 
> This follows the pattern established by BOOTPARAM_SOFTLOCKUP_PANIC
> and BOOTPARAM_HUNG_TASK_PANIC.  The runtime sysctl can still override
> the Kconfig default.
> 
> Signed-off-by: Gustavo Luiz Duarte <gustavold@xxxxxxxxx>

Tested-by: Breno Leitao <leitao@xxxxxxxxxx>