Re: [GIT PULL] Scheduler updates for v7.4

[Linus Torvalds]

On Sun, 18 Oct 2026 at 00:43, Ingo Molnar <mingo@xxxxxxxxxx> wrote:
>
> Please pull the latest sched/core Git tree from:
>
>    git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched-core-2026-10-18

So this seems to trigger for me on my laptop. Not every boot, but I've
seen it at least twice now:

> Stian Halseth (1):
>       sched/cputime: Don't account idle time twice after dyntick-idle

where the new WARN_ON_ONCE() triggers at boot, resulting in a splat like this

    now < tick_start
    WARNING: kernel/sched/cputime.c:481 at
kcpustat_dyntick_stop+0x82/0x90, CPU#2: swapper/2/0
    Modules linked in:
    CPU: 2 UID: 0 PID: 0 Comm: swapper/2 Not tainted
7.3.0-19045-gb92f6e90cf05 #7 PREEMPT(lazy)
    Hardware name: Dell Inc. XPS 13 9380/0KTW76, BIOS 1.26.0 09/11/2023
    RIP: 0010:kcpustat_dyntick_stop+0x82/0x90
    Call Trace:
     <TASK>
     tick_nohz_idle_exit+0xaf/0x140
     do_idle+0x1f5/0x2e0
     cpu_startup_entry+0x20/0x30
     start_secondary+0xf0/0x120
     common_startup_64+0x13e/0x148
     </TASK>

I haven't tried to figure out why, I'm just notifying the guilty parties...

                Linus