[PATCH] PM / hibernate/resume: clarify documentation
From: Uwe Geuder <hidden>
Date: 2015-06-29 20:35:12
Subsystem:
suspend to ram, the rest · Maintainers:
"Rafael J. Wysocki", Linus Torvalds
it was not the whole truth that kernel mode cannot be used with swap on LVM Signed-off-by: Uwe Geuder <redacted> --- Documentation/power/swsusp.txt | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/Documentation/power/swsusp.txt b/Documentation/power/swsusp.txt
index f732a83..8cc17ca 100644
--- a/Documentation/power/swsusp.txt
+++ b/Documentation/power/swsusp.txt@@ -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
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1.8.4.5