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Commit b51f9b10 authored by Uwe Geuder's avatar Uwe Geuder Committed by Rafael J. Wysocki
Browse files

PM / hibernate: clarify resume documentation 



it was not the whole truth that kernel mode cannot be used with swap on LVM

Signed-off-by: default avatarUwe Geuder <linuxkernel2015-ugeuder@snkmail.com>
Acked-by: default avatarPavel Machek <pavel@ucw.cz>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent d770e558

Documentation/power/swsusp.txt

+11 −2
Original line number Diff line number Diff line
@@ -410,8 +410,17 @@ Documentation/usb/persist.txt. 


Q: Can I suspend-to-disk using a swap partition under LVM?



A: No. You can suspend successfully, but you'll not be able to

resume. uswsusp should be able to work with LVM. See suspend.sf.net.

A: Yes and No.  You can suspend successfully, but the kernel will not be able

to resume on its own.  You need an initramfs that can recognize the resume

situation, activate the logical volume containing the swap volume (but not

touch any filesystems!), and eventually call



echo -n "$major:$minor" > /sys/power/resume



where $major and $minor are the respective major and minor device numbers of

the swap volume.



uswsusp works with LVM, too.  See http://suspend.sourceforge.net/



Q: I upgraded the kernel from 2.6.15 to 2.6.16. Both kernels were

compiled with the similar configuration files. Anyway I found that