From: Peter Zijlstra <peterz@infradead.org>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Yu Liao <liaoyu15@huawei.com>,
fweisbec@gmail.com, mingo@kernel.org, liwei391@huawei.com,
adobriyan@gmail.com, mirsad.todorovac@alu.unizg.hr,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH RFC] tick/nohz: fix data races in get_cpu_idle_time_us()
Date: Tue, 31 Jan 2023 20:57:59 +0100 [thread overview]
Message-ID: <Y9lyx38kHmKEF5CQ@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <87357q228f.ffs@tglx>
On Tue, Jan 31, 2023 at 03:44:00PM +0100, Thomas Gleixner wrote:
> P.S.: I hate the spinlock in the idle code path, but I don't have a
> better idea.
seqcount? It would avoid the obvious interleave and put most of the onus
on the reader (which never happens anyway).
next prev parent reply other threads:[~2023-01-31 19:58 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-28 2:00 Yu Liao
2023-01-31 14:44 ` Thomas Gleixner
2023-01-31 18:35 ` Alexey Dobriyan
2023-01-31 19:59 ` Peter Zijlstra
2023-01-31 19:57 ` Peter Zijlstra [this message]
2023-01-31 21:11 ` Frederic Weisbecker
2023-02-01 9:03 ` Peter Zijlstra
2023-02-08 15:19 ` [PATCH] timers/nohz: Restructure and reshuffle struct tick_sched Frederic Weisbecker
[not found] ` <20230201045302.316-1-hdanton@sina.com>
2023-02-01 12:02 ` [PATCH RFC] tick/nohz: fix data races in get_cpu_idle_time_us() Frederic Weisbecker
[not found] ` <20230201140117.539-1-hdanton@sina.com>
2023-02-01 14:28 ` Frederic Weisbecker
2023-02-06 7:03 ` kernel test robot
2023-02-07 5:25 ` Mirsad Goran Todorovac
2023-02-07 8:03 ` Mirsad Goran Todorovac
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