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From: Tejun Heo <tj@kernel.org>
To: Cheng-Yang Chou <yphbchou0911@gmail.com>
Cc: sched-ext@lists.linux.dev, David Vernet <void@manifault.com>,
	Andrea Righi <arighi@nvidia.com>,
	Changwoo Min <changwoo@igalia.com>,
	Ching-Chun Huang <jserv@ccns.ncku.edu.tw>,
	Chia-Ping Tsai <chia7712@gmail.com>,
	Zqiang <qiang.zhang@linux.dev>, kernel test robot <lkp@intel.com>
Subject: Re: [PATCH] sched_ext: Fix print_scx_info() build error on !CONFIG_EXT_SUB_SCHED kernels
Date: Fri, 27 Mar 2026 07:18:59 -1000	[thread overview]
Message-ID: <aca8A9UdYV8nElsB@slm.duckdns.org> (raw)
In-Reply-To: <tmzdbaqgbe3vypfbm6gdih6svfs6pyrdpnklgmmwc47brnika6@vtcswuax5dxq>

On Fri, Mar 27, 2026 at 01:35:53PM +0800, Cheng-Yang Chou wrote:
> Hi Tejun,
> 
> On Thu, Mar 26, 2026 at 04:09:15PM +0800, Cheng-Yang Chou wrote:
> > scx_task_sched_rcu() is only available when CONFIG_EXT_SUB_SCHED is
> > enabled. Wrap the call with #ifdef CONFIG_EXT_SUB_SCHED and fall back
> > to rcu_dereference(scx_root) for the non-sub-sched case, which is
> > semantically equivalent.
> > 
> > Fixes: 60d4b17e886a ("sched_ext: Choose the right sch->ops.name to output in the print_scx_info()")
> > Reported-by: kernel test robot <lkp@intel.com>
> > Closes: https://lore.kernel.org/oe-kbuild-all/202603261453.8kiJImYo-lkp@intel.com/
> > Signed-off-by: Cheng-Yang Chou <yphbchou0911@gmail.com>

Have you tried reproducing the problem? This is trivial to try to reproduce.
You aren't even doing the absoulte minimum. Before sending patches, read the
relevant code and reproduce the problem. I get that AI makes it easy to pump
up the volume but try to reduce the volume and improve the actual
contribution. Otherwise, I'll have to mostly ignore your emails.

Thanks.

-- 
tejun

  reply	other threads:[~2026-03-27 17:19 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-03-26  8:09 [PATCH] sched_ext: Fix print_scx_info() build error on !CONFIG_EXT_SUB_SCHED kernels Cheng-Yang Chou
2026-03-27  5:35 ` Cheng-Yang Chou
2026-03-27 17:18   ` Tejun Heo [this message]
2026-03-27 18:21     ` Cheng-Yang Chou
2026-03-27 18:41       ` Andrea Righi
2026-03-27 19:01         ` Cheng-Yang Chou
2026-03-27 19:48           ` Tejun Heo
  -- strict thread matches above, loose matches on Subject: below --
2026-04-03  4:09 [PATCH] tools/sched_ext: Add scx_lib_init() to probe BPF prolog migrate_disable() behavior Cheng-Yang Chou
2026-04-03  4:09 ` [PATCH] sched_ext: Fix print_scx_info() build error on !CONFIG_EXT_SUB_SCHED kernels Cheng-Yang Chou
2026-04-03  4:14   ` Cheng-Yang Chou

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