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| author | Milan Broz <gmazyland@gmail.com> | 2020-04-08 23:40:08 +0200 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2020-04-14 13:54:07 -0400 |
| commit | 0a2bd55c194ae8322638aceb4cc276cbf8b2f8b9 (patch) | |
| tree | e46f44b6711103723b93bd55f12079fbc5548124 /Documentation/admin-guide/device-mapper | |
| parent | 8267d8fb4819afa76b2a54dca48efdda6f0b1910 (diff) | |
| download | linux-stable-0a2bd55c194ae8322638aceb4cc276cbf8b2f8b9.tar.gz linux-stable-0a2bd55c194ae8322638aceb4cc276cbf8b2f8b9.tar.bz2 linux-stable-0a2bd55c194ae8322638aceb4cc276cbf8b2f8b9.zip | |
dm integrity: document allow_discard option
Add decription of the allow_discard option added in commit
84597a44a9d86ac949900441cea7da0af0f2f473.
Signed-off-by: Milan Broz <gmazyland@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'Documentation/admin-guide/device-mapper')
| -rw-r--r-- | Documentation/admin-guide/device-mapper/dm-integrity.rst | 15 |
1 files changed, 9 insertions, 6 deletions
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: |