From 355064675f1c997cea017ea64c8f2c216e5425d9 Mon Sep 17 00:00:00 2001 From: Mario Limonciello Date: Wed, 28 Mar 2018 12:01:09 -0500 Subject: PM / hibernate: Make passing hibernate offsets more friendly Currently the only way to specify a hibernate offset for a swap file is on the kernel command line. Add a new /sys/power/resume_offset that lets userspace specify the offset and disk to use when initiating a hibernate cycle. Signed-off-by: Mario Limonciello Signed-off-by: Rafael J. Wysocki --- Documentation/ABI/testing/sysfs-power | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'Documentation/ABI/testing') diff --git a/Documentation/ABI/testing/sysfs-power b/Documentation/ABI/testing/sysfs-power index 1e0d1dac706b..2f813d644c69 100644 --- a/Documentation/ABI/testing/sysfs-power +++ b/Documentation/ABI/testing/sysfs-power @@ -287,3 +287,17 @@ Description: Writing a "1" to this file enables the debug messages and writing a "0" (default) to it disables them. Reads from this file return the current value. + +What: /sys/power/resume_offset +Date: April 2018 +Contact: Mario Limonciello +Description: + This file is used for telling the kernel an offset into a disk + to use when hibernating the system such as with a swap file. + + Reads from this file will display the current offset + the kernel will be using on the next hibernation + attempt. + + Using this sysfs file will override any values that were + set using the kernel command line for disk offset. \ No newline at end of file -- cgit