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authorRafael J. Wysocki <rjw@sisk.pl>2006-01-06 03:15:56 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-06 11:33:42 -0500
commitca0aec0f7a94bf9f07fefa8bfd23282d4e8ceb8a (patch)
tree5f31f11eba908545d5e02698fe9c163a8612dd26 /Documentation/power/interface.txt
parentb3a93a255ec33a04776ec50efb30b7a99168dda2 (diff)
[PATCH] swsusp: make image size limit tunable
Make the suspend image size limit tunable via /sys/power/image_size. It is necessary for systems on which there is a limited amount of swap available for suspend. It can also be useful for optimizing performance of swsusp on systems with 1 GB of RAM or more. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'Documentation/power/interface.txt')
-rw-r--r--Documentation/power/interface.txt11
1 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/power/interface.txt b/Documentation/power/interface.txt
index f5ebda5f4276..bd4ffb5bd49a 100644
--- a/Documentation/power/interface.txt
+++ b/Documentation/power/interface.txt
@@ -41,3 +41,14 @@ to. Writing to this file will accept one of
41It will only change to 'firmware' or 'platform' if the system supports 41It will only change to 'firmware' or 'platform' if the system supports
42it. 42it.
43 43
44/sys/power/image_size controls the size of the image created by
45the suspend-to-disk mechanism. It can be written a string
46representing a non-negative integer that will be used as an upper
47limit of the image size, in megabytes. The suspend-to-disk mechanism will
48do its best to ensure the image size will not exceed that number. However,
49if this turns out to be impossible, it will try to suspend anyway using the
50smallest image possible. In particular, if "0" is written to this file, the
51suspend image will be as small as possible.
52
53Reading from this file will display the current image size limit, which
54is set to 500 MB by default.