linux-kernel - Re: [PATCH v2 01/23] sched/cache: Introduce infrastructure for cache-aware load balancing

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Message-ID: <430d1ceb-1898-4a3e-9802-9334cea04423@intel.com>
Date: Wed, 10 Dec 2025 22:57:27 +0900
From: "Chen, Yu C" <yu.c.chen@...el.com>
To: Peter Zijlstra <peterz@...radead.org>, Tim Chen
	<tim.c.chen@...ux.intel.com>
CC: Ingo Molnar <mingo@...hat.com>, K Prateek Nayak <kprateek.nayak@....com>,
	"Gautham R . Shenoy" <gautham.shenoy@....com>, Vincent Guittot
	<vincent.guittot@...aro.org>, Juri Lelli <juri.lelli@...hat.com>, "Dietmar
 Eggemann" <dietmar.eggemann@....com>, Steven Rostedt <rostedt@...dmis.org>,
	Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>, "Valentin
 Schneider" <vschneid@...hat.com>, Madadi Vineeth Reddy
	<vineethr@...ux.ibm.com>, Hillf Danton <hdanton@...a.com>, Shrikanth Hegde
	<sshegde@...ux.ibm.com>, Jianyong Wu <jianyong.wu@...look.com>, Yangyu Chen
	<cyy@...self.name>, Tingyin Duan <tingyin.duan@...il.com>, Vern Hao
	<vernhao@...cent.com>, Vern Hao <haoxing990@...il.com>, Len Brown
	<len.brown@...el.com>, Aubrey Li <aubrey.li@...el.com>, Zhao Liu
	<zhao1.liu@...el.com>, Chen Yu <yu.chen.surf@...il.com>, Adam Li
	<adamli@...amperecomputing.com>, Aaron Lu <ziqianlu@...edance.com>, Tim Chen
	<tim.c.chen@...el.com>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 01/23] sched/cache: Introduce infrastructure for
 cache-aware load balancing

On 12/10/2025 6:37 PM, Peter Zijlstra wrote:
> On Wed, Dec 03, 2025 at 03:07:20PM -0800, Tim Chen wrote:
> 
>> +static unsigned long __no_profile fraction_mm_sched(struct rq *rq, struct mm_sched *pcpu_sched)
> 
>> +static void __no_profile task_cache_work(struct callback_head *work)
> 
> What's with the random __no_profile things?

In the early version without this tag we got some error reports by gcov.
We will check if this issue still exists and do some investigations.

thanks,
Chenyu