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Date: Fri, 20 Feb 2026 15:29:28 +0100
From: Peter Zijlstra <peterz@infradead.org>
To: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>,
	K Prateek Nayak <kprateek.nayak@amd.com>,
	"Gautham R . Shenoy" <gautham.shenoy@amd.com>,
	Vincent Guittot <vincent.guittot@linaro.org>,
	Chen Yu <yu.c.chen@intel.com>, Juri Lelli <juri.lelli@redhat.com>,
	Dietmar Eggemann <dietmar.eggemann@arm.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
	Valentin Schneider <vschneid@redhat.com>,
	Madadi Vineeth Reddy <vineethr@linux.ibm.com>,
	Hillf Danton <hdanton@sina.com>,
	Shrikanth Hegde <sshegde@linux.ibm.com>,
	Jianyong Wu <jianyong.wu@outlook.com>,
	Yangyu Chen <cyy@cyyself.name>,
	Tingyin Duan <tingyin.duan@gmail.com>,
	Vern Hao <vernhao@tencent.com>, Vern Hao <haoxing990@gmail.com>,
	Len Brown <len.brown@intel.com>, Aubrey Li <aubrey.li@intel.com>,
	Zhao Liu <zhao1.liu@intel.com>, Chen Yu <yu.chen.surf@gmail.com>,
	Adam Li <adamli@os.amperecomputing.com>,
	Aaron Lu <ziqianlu@bytedance.com>, Tim Chen <tim.c.chen@intel.com>,
	Josh Don <joshdon@google.com>, Gavin Guo <gavinguo@igalia.com>,
	Qais Yousef <qyousef@layalina.io>,
	Libo Chen <libchen@purestorage.com>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 19/21] sched/cache: Add user control to adjust the
 aggressiveness of cache-aware scheduling
Message-ID: <20260220142928.GS1395266@noisy.programming.kicks-ass.net>
References: <cover.1770760558.git.tim.c.chen@linux.intel.com>
 <ea12146a9f431b0a6f3ff30b0197c3f4a1d807f1.1770760558.git.tim.c.chen@linux.intel.com>
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In-Reply-To: <ea12146a9f431b0a6f3ff30b0197c3f4a1d807f1.1770760558.git.tim.c.chen@linux.intel.com>

On Tue, Feb 10, 2026 at 02:18:59PM -0800, Tim Chen wrote:

> diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
> index bae747eddc59..dc4b7de6569f 100644
> --- a/kernel/sched/debug.c
> +++ b/kernel/sched/debug.c
> @@ -566,6 +566,16 @@ static __init int sched_init_debug(void)
>  #ifdef CONFIG_SCHED_CACHE
>  	debugfs_create_file("llc_enabled", 0644, debugfs_sched, NULL,
>  			    &sched_cache_enable_fops);
> +	debugfs_create_u32("llc_aggr_tolerance", 0644, debugfs_sched,
> +			   &llc_aggr_tolerance);
> +	debugfs_create_u32("llc_epoch_period", 0644, debugfs_sched,
> +			   &llc_epoch_period);
> +	debugfs_create_u32("llc_epoch_affinity_timeout", 0644, debugfs_sched,
> +			   &llc_epoch_affinity_timeout);
> +	debugfs_create_u32("llc_overaggr_pct", 0644, debugfs_sched,
> +			   &llc_overaggr_pct);
> +	debugfs_create_u32("llc_imb_pct", 0644, debugfs_sched,
> +			   &llc_imb_pct);
>  #endif

So we have debug/sched/numa_balancing/, would it make sense to stick all
of this into debug/sched/llc_balancing/ or so?