linux-kernel - Re: [RFC PATCH v4 01/28] sched: Cache aware load-balancing

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <2623ee0c-b967-44c1-a9d4-4ca7dd9929df@intel.com>
Date: Tue, 12 Aug 2025 11:26:30 +0800
From: "Chen, Yu C" <yu.c.chen@...el.com>
To: kernel test robot <oliver.sang@...el.com>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, <linux-mm@...ck.org>,
	<linux-kernel@...r.kernel.org>, <aubrey.li@...ux.intel.com>, Peter Zijlstra
	<peterz@...radead.org>, 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>, Libo Chen
	<libo.chen@...cle.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>, Len
 Brown <len.brown@...el.com>, Tim Chen <tim.c.chen@...ux.intel.com>, Aubrey Li
	<aubrey.li@...el.com>, Zhao Liu <zhao1.liu@...el.com>, Chen Yu
	<yu.chen.surf@...il.com>
Subject: Re: [RFC PATCH v4 01/28] sched: Cache aware load-balancing

Hi,

On 8/12/2025 9:30 AM, kernel test robot wrote:
> [ 18.146207][ T63] RIP: 0010:_find_next_bit (kbuild/src/consumer/lib/find_bit.c:156 (discriminator 2))
> [ 18.146207][ T63] task_cache_work (kbuild/src/consumer/include/linux/find.h:71 (discriminator 2)
> kbuild/src/consumer/kernel/sched/fair.c:1325 (discriminator 2))

This should have been fixed in the second patch:
02/28 ("sched: Several fixes for cache aware scheduling")that the LLC 
sched domain could be NULL and we should skip the
NULL LLC sched domain.

It might be more applicable to test with the whole patch set.
As this is a RFC version and we will create a formal one with
the fixes integrated into the 01/28 patch, after the issues
have been addressed.

thanks,
Chenyu