From: Thomas Gleixner <tglx@linutronix.de>
To: SeongJae Park <sj@kernel.org>, akpm@linux-foundation.org
Cc: oleksandr@natalenko.name, john.stultz@linaro.org,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
SeongJae Park <sj@kernel.org>
Subject: Re: [PATCH v3 1/2] timers: Implement usleep_idle_range()
Date: Fri, 26 Nov 2021 22:26:06 +0100 [thread overview]
Message-ID: <874k7yhamp.ffs@tglx> (raw)
In-Reply-To: <20211126145015.15862-2-sj@kernel.org>
On Fri, Nov 26 2021 at 14:50, SeongJae Park wrote:
> Some kernel threads such as DAMON could need to repeatedly sleep in
> micro seconds level. Because usleep_range() sleeps in uninterruptible
> state, however, such threads would make /proc/loadavg reports fake load.
>
> To help such cases, this commit implements a variant of usleep_range()
> called usleep_idle_range(). It is same to usleep_range() but sets the
> state of the current task as TASK_IDLE while sleeping.
>
> Suggested-by: Andrew Morton <akpm@linux-foundation.org>
> Signed-off-by: SeongJae Park <sj@kernel.org>
Andrew, I assume you want to pick that up along with the mm fix, right?
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
next prev parent reply other threads:[~2021-11-26 21:26 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-26 14:50 [PATCH v3 0/2] mm/damon: Fix fake /proc/loadavg reports SeongJae Park
2021-11-26 14:50 ` [PATCH v3 1/2] timers: Implement usleep_idle_range() SeongJae Park
2021-11-26 21:26 ` Thomas Gleixner [this message]
2021-11-26 14:50 ` [PATCH v3 2/2] mm/damon/core: Fix fake load reports due to uninterruptible sleeps SeongJae Park
2021-11-27 13:09 ` [PATCH v3 0/2] mm/damon: Fix fake /proc/loadavg reports Oleksandr Natalenko
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