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authorJoe Thornber <ejt@redhat.com>2012-03-28 21:41:24 +0400
committerAlasdair G Kergon <agk@redhat.com>2012-03-28 21:41:24 +0400
commitfe878f34df89ad4af758f40bbec829807dc93a00 (patch)
treeeaa377c640fd595391491725ab477f29062374b1 /Documentation/device-mapper/thin-provisioning.txt
parent035220b33d6865d81d5433600def53373cca7127 (diff)
downloadlinux-fe878f34df89ad4af758f40bbec829807dc93a00.tar.xz
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>
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diff --git a/Documentation/device-mapper/thin-provisioning.txt b/Documentation/device-mapper/thin-provisioning.txt
index 1ff044d87ca4..da50347c0053 100644
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+++ 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