linux-kernel - Re: [PATCH] PM / suspend: measure the time of filesystem syncing

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Date:   Wed, 6 Feb 2019 15:31:36 +0000
From:   "Pan, Harry" <harry.pan@...el.com>
To:     "pavel@....cz" <pavel@....cz>
CC:     "Brown, Len" <len.brown@...el.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "gs0622@...il.com" <gs0622@...il.com>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "rjw@...ysocki.net" <rjw@...ysocki.net>
Subject: Re: [PATCH] PM / suspend: measure the time of filesystem syncing

> The backdrop is some stress test script of suspend/resume, like
> Chrome
> OS, is designed to program an expected RTC wake-alarm then issue
> suspend command, while in rare case (or buggy software), the
> filesystem
> sync could cost longer time in seconds, this consumes the alarm
> budget
> causes suspend aborting, it could be abstruse to production line
> developers to realize it is not a platform issue in terms of drivers
> suspending; given a such metric might make the communication easier,
> this is my intuition.
> 
apologize rephrase: my intuition -> my motivation