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] Scheduler time slice extension 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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20250502123433.AHDVLZdY@linutronix.de \
--to=bigeasy@linutronix.de \
--cc=kprateek.nayak@amd.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mathieu.desnoyers@efficios.com \
--cc=peterz@infradead.org \
--cc=prakash.sangappa@oracle.com \
--cc=rostedt@goodmis.org \
--cc=tglx@linutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.