linux-kernel - Re:Re: [PATCH] hrtimer.c : Remove redundant thread state settings

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Date: Fri, 12 Jan 2024 13:03:47 +0800 (CST)
From: lizhe  <sensor1010@....com>
To: "Thomas Gleixner" <tglx@...utronix.de>
Cc: ilpo.jarvinen@...ux.intel.com, linux-kernel@...r.kernel.org
Subject: Re:Re: [PATCH] hrtimer.c : Remove redundant thread state settings







Hi, 
    Please review this patch, It does not check the condition when executing the scheduler() function.
       
                                                                                                       Lizhe
                                                                                           thanks











At 2024-01-12 00:44:20, "Thomas Gleixner" <tglx@...utronix.de> wrote:
>On Wed, Jan 10 2024 at 06:13, Lizhe wrote:
>> After a thread is awakened, its state is already task_running
>
>That's correct, but please look at hrtimer_wakeup() and the conditional
>schedule() invocation in schedule_hrtimeout_range_clock(). You break the
>guarantee that this function returns with task state == TASK_RUNNING.
>
>Thanks,
>
>        tglx

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