linux-kernel - Re: [PATCH] power/hibernate: Make passing hibernate offsets more friendly

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Date:   Mon, 19 Mar 2018 11:11:07 +0100
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Mario Limonciello <mario.limonciello@...l.com>
Cc:     linux-acpi@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] power/hibernate: Make passing hibernate offsets more friendly

On Tuesday, March 6, 2018 11:53:40 AM CET Mario Limonciello wrote:
> Currently the only way to specify a hibernate offset for a
> swap file is on the kernel command line.
> 
> Add a new /sys/power/disk_offset that lets userspace
> specify the offset and disk to use when initiating a hibernate
> cycle.
> 
> Also split up the parsing routine to re-use the same code
> for the /sys/power/resume and /sys/power/disk_offset parsing.
> 
> Signed-off-by: Mario Limonciello <mario.limonciello@...l.com>

Well, IMO /sys/power/resume and /sys/power/disk_offset would be confusingly
similar after this patch.

I wonder if adding a resume_offset sysfs attr to simply allow the value of
resume offset alone to be passed to the kernel at run time (in addition to
the command line) would work?

Thanks!