From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Prakash Sangappa <prakash.sangappa@oracle.com>
Cc: linux-kernel@vger.kernel.org, peterz@infradead.org,
rostedt@goodmis.org, mathieu.desnoyers@efficios.com,
tglx@linutronix.de, kprateek.nayak@amd.com
Subject: Re: [PATCH V3 1/4] Sched: Scheduler time slice extension
Date: Fri, 2 May 2025 14:34:33 +0200 [thread overview]
Message-ID: <20250502123433.AHDVLZdY@linutronix.de> (raw)
In-Reply-To: <20250502015955.3146733-2-prakash.sangappa@oracle.com>
On 2025-05-02 01:59:52 [+0000], Prakash Sangappa wrote:
> diff --git a/kernel/entry/common.c b/kernel/entry/common.c
> index 20154572ede9..b26adccb32df 100644
> --- a/kernel/entry/common.c
> +++ b/kernel/entry/common.c
> @@ -98,8 +99,12 @@ __always_inline unsigned long exit_to_user_mode_loop(struct pt_regs *regs,
>
> local_irq_enable_exit_to_user(ti_work);
>
> - if (ti_work & (_TIF_NEED_RESCHED | _TIF_NEED_RESCHED_LAZY))
> - schedule();
> + if (ti_work & (_TIF_NEED_RESCHED | _TIF_NEED_RESCHED_LAZY)) {
I asked to limit this to LAZY only.
> + if (irq && rseq_delay_resched())
> + clear_tsk_need_resched(current);
> + else
> + schedule();
> + }
>
> if (ti_work & _TIF_UPROBE)
> uprobe_notify_resume(regs);
Sebastian
next prev parent reply other threads:[~2025-05-02 12:34 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-02 1:59 [PATCH V3 0/4] " Prakash Sangappa
2025-05-02 1:59 ` [PATCH V3 1/4] Sched: " Prakash Sangappa
2025-05-02 9:05 ` Peter Zijlstra
2025-05-02 13:06 ` Steven Rostedt
2025-05-05 1:51 ` Prakash Sangappa
2025-05-05 14:48 ` Steven Rostedt
2025-05-05 15:58 ` Prakash Sangappa
2025-05-05 16:34 ` Steven Rostedt
2025-05-05 16:45 ` Steven Rostedt
2025-05-06 1:23 ` Prakash Sangappa
2025-05-06 13:13 ` Steven Rostedt
2025-05-02 15:39 ` Mathieu Desnoyers
2025-05-05 1:46 ` Prakash Sangappa
2025-05-05 1:42 ` Prakash Sangappa
2025-05-02 12:34 ` Sebastian Andrzej Siewior [this message]
2025-05-02 14:35 ` Peter Zijlstra
2025-05-02 15:27 ` Sebastian Andrzej Siewior
2025-05-02 1:59 ` [PATCH V3 2/4] Sched: Tunable to specify duration of " Prakash Sangappa
2025-05-02 1:59 ` [PATCH V3 3/4] Sched: Add scheduler stat for cpu " Prakash Sangappa
2025-05-02 1:59 ` [PATCH V3 4/4] Sched: Add tracepoint for sched " Prakash Sangappa
2025-05-02 9:14 ` Peter Zijlstra
2025-05-02 11:02 ` Sebastian Andrzej Siewior
2025-05-02 11:10 ` Peter Zijlstra
2025-05-02 12:31 ` Sebastian Andrzej Siewior
2025-05-05 1:43 ` Prakash Sangappa
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