linux-kernel - [PATCH] cpu/hotplug: Increase the number of dynamic states

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Date: Tue, 19 Dec 2023 11:34:11 +0800
From: wangxiaoming321 <xiaoming.wang@...el.com>
To: tglx@...utronix.de,
	peterz@...radead.org,
	linux-kernel@...r.kernel.org
Cc: wangxiaoming321 <xiaoming.wang@...el.com>
Subject: [PATCH] cpu/hotplug: Increase the number of dynamic states

The dynamically allocatable hotplug state space can be exhausted by
the existing drivers and infrastructure which install CPU hotplug
states dynamically. That prevents new drivers and infrastructure from
installing dynamically allocated states.

Increase the size of the CPUHP_AP_ONLINE_DYN state by 10 to make
room.

Signed-off-by: wangxiaoming321 <xiaoming.wang@...el.com>
---
 include/linux/cpuhotplug.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h
index efc0c0b07efb..c88a58c363f1 100644
--- a/include/linux/cpuhotplug.h
+++ b/include/linux/cpuhotplug.h
@@ -251,7 +251,7 @@ enum cpuhp_state {
 	CPUHP_AP_RCUTREE_ONLINE,
 	CPUHP_AP_BASE_CACHEINFO_ONLINE,
 	CPUHP_AP_ONLINE_DYN,
-	CPUHP_AP_ONLINE_DYN_END		= CPUHP_AP_ONLINE_DYN + 30,
+	CPUHP_AP_ONLINE_DYN_END		= CPUHP_AP_ONLINE_DYN + 40,
 	/* Must be after CPUHP_AP_ONLINE_DYN for node_states[N_CPU] update */
 	CPUHP_AP_MM_DEMOTION_ONLINE,
 	CPUHP_AP_X86_HPET_ONLINE,
-- 
2.25.1