path: root/Documentation/power
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authorPali Rohár <pali.rohar@gmail.com>2014-05-06 13:01:56 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-05-07 01:51:16 +0200
commit8a54cd5bd6ebf009b96ec79510b593f7ba5c0ff3 (patch)
tree3ca0ab1a76dec969fabf3e2adb97d1842b0de4dd /Documentation/power
parentaa9abe2c8eddf426c9b89757129b132c484ee223 (diff)
PM / hibernate: Documentation: Fix script for unswapping
System can have mmaped also character devices (e.g dri devices by X) or deleted files. Running cat on character devices is really bad idea (system can hang) so run cat only on regular files. Also mmaped files can have spaces in filenames. Signed-off-by: Pali Rohár <pali.rohar@gmail.com> [rjw: Subject] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'Documentation/power')
1 files changed, 4 insertions, 1 deletions
diff --git a/Documentation/power/swsusp.txt b/Documentation/power/swsusp.txt
index 079160e22bcc..f732a8321e8a 100644
--- a/Documentation/power/swsusp.txt
+++ b/Documentation/power/swsusp.txt
@@ -220,7 +220,10 @@ Q: After resuming, system is paging heavily, leading to very bad interactivity.
A: Try running
-cat `cat /proc/[0-9]*/maps | grep / | sed 's:.* /:/:' | sort -u` > /dev/null
+cat /proc/[0-9]*/maps | grep / | sed 's:.* /:/:' | sort -u | while read file
+ test -f "$file" && cat "$file" > /dev/null
after resume. swapoff -a; swapon -a may also be useful.

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