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From: Tejun Heo <tj@kernel.org>
To: Andrea Righi <arighi@nvidia.com>
Cc: David Vernet <void@manifault.com>,
	Changwoo Min <changwoo@igalia.com>,
	linux-kernel@vger.kernel.org, sched-ext@lists.linux.dev
Subject: Re: [PATCH 2/4] sched_ext: Add scx_bpf_task_set_slice() and scx_bpf_task_set_dsq_vtime()
Date: Tue, 7 Oct 2025 08:09:29 -1000	[thread overview]
Message-ID: <aOVXWeBkCO7rUDvX@slm.duckdns.org> (raw)
In-Reply-To: <aOTewKyj8-0ub-23@gpd4>

On Tue, Oct 07, 2025 at 11:34:56AM +0200, Andrea Righi wrote:
> Hi Tejun,
> 
> On Mon, Oct 06, 2025 at 03:51:45PM -1000, Tejun Heo wrote:
> > With the planned hierarchical scheduler support, sub-schedulers will need to
> > be verified for authority before being allowed to modify task->scx.slice and
> > task->scx.dsq_vtime. Add scx_bpf_task_set_slice() and
> > scx_bpf_task_set_dsq_vtime() which will perform the necessary permission
> > checks.
> > 
> > Root schedulers can still directly write to these fields, so this doesn't
> > affect existing schedulers.
> > 
> > Signed-off-by: Tejun Heo <tj@kernel.org>
> > ---
> 
> Maybe provide __COMPAT_scx_bpf_task_set_slice() and
> __COMPAT_scx_bpf_task_set_dsq_vtime(), but we can do this later.

Ah, right. Will do.

Thanks.

-- 
tejun

  reply	other threads:[~2025-10-07 18:09 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-10-07  1:51 [PATCHSET sched_ext/for-6.19] sched_ext: Misc changes with some prep patches for sub-sched support Tejun Heo
2025-10-07  1:51 ` [PATCH 1/4] tools/sched_ext: Strip compatibility macros for cgroup and dispatch APIs Tejun Heo
2025-10-07  2:42   ` Emil Tsalapatis
2025-10-07  9:42   ` Andrea Righi
2025-10-07 16:22   ` Changwoo Min
2025-10-07  1:51 ` [PATCH 2/4] sched_ext: Add scx_bpf_task_set_slice() and scx_bpf_task_set_dsq_vtime() Tejun Heo
2025-10-07  2:56   ` Emil Tsalapatis
2025-10-07 18:09     ` Tejun Heo
2025-10-07  9:34   ` Andrea Righi
2025-10-07 18:09     ` Tejun Heo [this message]
2025-10-07 16:28   ` Changwoo Min
2025-10-07 18:11     ` Tejun Heo
2025-10-07  1:51 ` [PATCH 3/4] sched_ext: Wrap kfunc args in struct to prepare for aux__prog Tejun Heo
2025-10-07  9:48   ` Andrea Righi
2025-10-07 18:24     ` Tejun Heo
2025-10-07 18:37       ` Andrea Righi
2025-10-07 16:04   ` Emil Tsalapatis
2025-10-07 16:38   ` Changwoo Min
2025-10-07  1:51 ` [PATCH 4/4] sched_ext: Make scx_bpf_dsq_insert*() return bool Tejun Heo
2025-10-07  4:28   ` Emil Tsalapatis
2025-10-07  9:41   ` Andrea Righi
2025-10-07 15:03     ` Emil Tsalapatis
2025-10-07 17:25       ` Andrea Righi
2025-10-07 16:47   ` Changwoo Min
2025-10-07 19:06 ` [PATCH 5/4] sched_ext/tools: Add compat wrapper for scx_bpf_task_set_slice/dsq_vtime() Tejun Heo
2025-10-13 18:53 ` [PATCHSET sched_ext/for-6.19] sched_ext: Misc changes with some prep patches for sub-sched support Tejun Heo

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