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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-04-30 16:45:08 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-04-30 16:45:08 -0700 |
| commit | c45e8bccecaf633480d378daff11e122dfd5e96d (patch) | |
| tree | 0da33865b39dfbdc0ce43b75f61901a6529c980d /Documentation | |
| parent | 39e16d93424b61e0b5bd182e308a56d5f0e489d6 (diff) | |
| parent | 5686dee34dbfe0238c0274e0454fa0174ac0a57a (diff) | |
| download | linux-c45e8bccecaf633480d378daff11e122dfd5e96d.tar.gz | |
Merge tag 'for-5.7/dm-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper fixes from Mike Snitzer: - Document DM integrity allow_discard feature that was added during 5.7 merge window. - Fix potential for DM writecache data corruption during DM table reloads. - Fix DM verity's FEC support's hash block number calculation in verity_fec_decode(). - Fix bio-based DM multipath crash due to use of stale copy of MPATHF_QUEUE_IO flag state in __map_bio(). * tag 'for-5.7/dm-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: dm multipath: use updated MPATHF_QUEUE_IO on mapping for bio-based mpath dm verity fec: fix hash block number in verity_fec_decode dm writecache: fix data corruption when reloading the target dm integrity: document allow_discard option
Diffstat (limited to 'Documentation')
| -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: |