linux-kernel - Re: [PATCH v2] PM: Add a switch for disabling/enabling sync() before suspend

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Message-ID: <1c12532c-66dd-cb89-d88e-b4c220099db9@freesources.org>
Date:   Fri, 10 Jan 2020 11:52:03 +0100
From:   Jonas Meurer <jonas@...esources.org>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:     linux-kernel@...r.kernel.org, Linux PM <linux-pm@...r.kernel.org>,
        Pavel Machek <pavel@....cz>, Len Brown <len.brown@...el.com>,
        Tim Dittler <tim.dittler@...temli.org>,
        Yannik Sembritzki <yannik@...britzki.me>
Subject: Re: [PATCH v2] PM: Add a switch for disabling/enabling sync() before
 suspend

Hey Rafael,

Jonas Meurer:
> The switch allows to enable or disable the final sync() from the suspend.c
> Linux Kernel system suspend implementation. This is useful to avoid race
> conditions if block devices have been suspended before. Be aware that you
> have to take care of sync() yourself before suspending the system if you
> disable it here.
> 
> Congruously, the behaviour of build-time switch CONFIG_SUSPEND_SKIP_SYNC
> is slightly changed: It now configures the default for fun-time switch
> '/sys/power/sync_on_suspend'.
> 
> Signed-off-by: Jonas Meurer <jonas@...esources.org>

Sorry to poke you again :)

Did you find time to further look into the patch yet?

Cheers
 jonas



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