dm-thin: remove some documentation for the unimplemented 'trim' target message
 

I'd planned a 'trim' target message for shrinking thin devices, but
this is better handled via the discard ioctl.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
---
Documentation/device-mapper/thin-provisioning.txt | 10 ----------
1 files changed, 0 insertions(+), 10 deletions(-)

diff --git a/Documentation/device-mapper/thin-provisioning.txt b/Documentation/device-mapper/thin-provisioning.txt
index 801d9d1..981aebb 100644
--- a/Documentation/device-mapper/thin-provisioning.txt
+++ b/Documentation/device-mapper/thin-provisioning.txt
@@ -237,16 +237,6 @@ iii) Messages

Deletes a thin device. Irreversible.

- trim <dev id> <new size in sectors>
-
- Delete mappings from the end of a thin device. Irreversible.
- You might want to use this if you're reducing the size of
- your thinly-provisioned device. In many cases, due to the
- sharing of blocks between devices, it is not possible to
- determine in advance how much space 'trim' will release. (In
- future a userspace tool might be able to perform this
- calculation.)
-
set_transaction_id <current id> <new id>

Userland volume managers, such as LVM, need a way to
--
1.7.9.1

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