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authorJoe Thornber <ejt@redhat.com>2012-03-28 18:41:24 +0100
committerAlasdair G Kergon <agk@redhat.com>2012-03-28 18:41:24 +0100
commitfe878f34df89ad4af758f40bbec829807dc93a00 (patch)
treeeaa377c640fd595391491725ab477f29062374b1
parent035220b33d6865d81d5433600def53373cca7127 (diff)
dm thin: correct comments
Remove documentation for unimplemented 'trim' 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> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
-rw-r--r--Documentation/device-mapper/thin-provisioning.txt10
-rw-r--r--drivers/md/dm-thin.c2
2 files changed, 1 insertions, 11 deletions
diff --git a/Documentation/device-mapper/thin-provisioning.txt b/Documentation/device-mapper/thin-provisioning.txt
index 1ff044d87ca4..da50347c0053 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
diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index da2f0217df66..1791134cf477 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -72,7 +72,7 @@
* missed out if the io covers the block. (schedule_copy).
*
* iv) insert the new mapping into the origin's btree
- * (process_prepared_mappings). This act of inserting breaks some
+ * (process_prepared_mapping). This act of inserting breaks some
* sharing of btree nodes between the two devices. Breaking sharing only
* effects the btree of that specific device. Btrees for the other
* devices that share the block never change. The btree for the origin