linux-kernel - [PATCH] sched: change MAX_SHARES to NR

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Message-Id: <20250812092810.38728-1-yaozhenguo@jd.com>
Date: Tue, 12 Aug 2025 17:28:10 +0800
From: yaozhenguo <yaozhenguo1@...il.com>
To: mingo@...hat.com,
	peterz@...radead.org,
	vincent.guittot@...aro.org
Cc: linux-kernel@...r.kernel.org,
	yaozhenguo@...com,
	ZhenguoYao <yaozhenguo1@...il.com>
Subject: [PATCH] sched: change MAX_SHARES to NR_CPUS

From: ZhenguoYao <yaozhenguo1@...il.com>

As the number of cores in modern CPUs continues to increase,
256 * 1024 is no longer sufficient to meet the requirements.
Therefore, MAX_SHARES is being modified to NR_CPUS * 1024.

Signed-off-by: ZhenguoYao <yaozhenguo1@...il.com>
---
 kernel/sched/sched.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index be9745d104f7..5c219e34f48d 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -510,7 +510,7 @@ struct task_group {
  *  limitation from this.)
  */
 #define MIN_SHARES		(1UL <<  1)
-#define MAX_SHARES		(1UL << 18)
+#define MAX_SHARES		(NR_CPUS * 1024UL)
 #endif
 
 typedef int (*tg_visitor)(struct task_group *, void *);
-- 
2.43.5