diff mbox series

dm-integrity: Document allow_discard option.

Message ID 20200408214008.209424-1-gmazyland@gmail.com (mailing list archive)
State Accepted, archived
Delegated to: Mike Snitzer
Headers show
Series dm-integrity: Document allow_discard option. | expand

Commit Message

Milan Broz April 8, 2020, 9:40 p.m. UTC 
This patch adds decription of the allow_discard option
added in commit 84597a44a9d86ac949900441cea7da0af0f2f473.

Signed-off-by: Milan Broz <gmazyland@gmail.com>
---
 .../admin-guide/device-mapper/dm-integrity.rst    | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)
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Patch

diff --git a/Documentation/admin-guide/device-mapper/dm-integrity.rst b/Documentation/admin-guide/device-mapper/dm-integrity.rst
index c00f9f11e3f3..8439d2ae689b 100644
--- a/Documentation/admin-guide/device-mapper/dm-integrity.rst
+++ b/Documentation/admin-guide/device-mapper/dm-integrity.rst
@@ -182,12 +182,15 @@  fix_padding
 	space-efficient. If this option is not present, large padding is
 	used - that is for compatibility with older kernels.
 
-
-The journal mode (D/J), buffer_sectors, journal_watermark, commit_time can
-be changed when reloading the target (load an inactive table and swap the
-tables with suspend and resume). The other arguments should not be changed
-when reloading the target because the layout of disk data depend on them
-and the reloaded target would be non-functional.
+allow_discards
+	Allow block discard requests (a.k.a. TRIM) for the integrity device.
+	Discards are only allowed to devices using internal hash.
+
+The journal mode (D/J), buffer_sectors, journal_watermark, commit_time and
+allow_discards can be changed when reloading the target (load an inactive
+table and swap the tables with suspend and resume). The other arguments
+should not be changed when reloading the target because the layout of disk
+data depend on them and the reloaded target would be non-functional.
 
 
 The layout of the formatted block device: