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| author | Karel Zak | 2010-11-10 11:48:30 +0100 |
|---|---|---|
| committer | Karel Zak | 2010-11-10 11:48:30 +0100 |
| commit | 37f243ed57e5a783c19c4784cf24dfed52b89e32 (patch) | |
| tree | dd4fca82292518017f1a1a94693076752b8d012f | |
| parent | docs: remove ipc.texi (info with IPC API docs) (diff) | |
| download | kernel-qcow2-util-linux-37f243ed57e5a783c19c4784cf24dfed52b89e32.tar.gz kernel-qcow2-util-linux-37f243ed57e5a783c19c4784cf24dfed52b89e32.tar.xz kernel-qcow2-util-linux-37f243ed57e5a783c19c4784cf24dfed52b89e32.zip | |
swapon: better text for "discard", note about swapon in fstab.5
Suggested by Hugh Dickins. Thanks.
Signed-off-by: Karel Zak <kzak@redhat.com>
| -rw-r--r-- | mount/fstab.5 | 5 | ||||
| -rw-r--r-- | mount/swapon.8 | 6 |
2 files changed, 7 insertions, 4 deletions
diff --git a/mount/fstab.5 b/mount/fstab.5 index 99557194e..cd5cf5583 100644 --- a/mount/fstab.5 +++ b/mount/fstab.5 @@ -176,8 +176,11 @@ This field describes the mount options associated with the filesystem. It is formatted as a comma separated list of options. It contains at least the type of mount plus any additional options appropriate to the filesystem -type. For documentation on the available options, see +type. For documentation on the available mount options, see .BR mount (8). +For documentation on the available swap options, see +.BR swapon (8). + Basic file system independent options are: .TP .B defaults diff --git a/mount/swapon.8 b/mount/swapon.8 index e35c6e5f5..1fe62987a 100644 --- a/mount/swapon.8 +++ b/mount/swapon.8 @@ -113,14 +113,14 @@ are made available, except for those with the ``noauto'' option. Devices that are already being used as swap are silently skipped. .TP .B "\-d, \-\-discard" -Swapping will discard clusters of swap pages in between freeing them -and re-writing to them, if the swap device supports that. +Discard freed swap pages before they are reused, if the swap +device supports the discard or trim operation. This may improve +performance on some Solid State Devices, but often it does not. The .I /etc/fstab mount option .BI discard may be also used to enable discard flag. - .TP .B "\-e, \-\-ifexists" Silently skip devices that do not exist. |