[PATCH] suspend: update documentation
Update suspend documentation.
Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/Documentation/power/swsusp.txt b/Documentation/power/swsusp.txt
index 7a6b789..ddf907f 100644
--- a/Documentation/power/swsusp.txt
+++ b/Documentation/power/swsusp.txt
@@ -311,3 +311,10 @@
system is shut down or suspended. Additionally use the encrypted
suspend image to prevent sensitive data from being stolen after
resume.
+
+Q: Why we cannot suspend to a swap file?
+
+A: Because accessing swap file needs the filesystem mounted, and
+filesystem might do something wrong (like replaying the journal)
+during mount. [Probably could be solved by modifying every filesystem
+to support some kind of "really read-only!" option. Patches welcome.]