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authorMilan Broz <gmazyland@gmail.com>2020-08-20 20:45:38 +0300
committerMike Snitzer <snitzer@redhat.com>2020-09-22 20:24:46 +0300
commit4a5caa4af0df5cd8f1c7f0c2f871d382662b022e (patch)
treea469ccc3c3c995cf20709e583f0e95cadcf3fc2f /Documentation/admin-guide/device-mapper
parentcf9c37865557d39292d82da29e9ebda1dbc584b3 (diff)
downloadlinux-4a5caa4af0df5cd8f1c7f0c2f871d382662b022e.tar.xz
dm crypt: document new no_workqueue flags
Commit 39d42fa96ba1 ("dm crypt: add flags to optionally bypass kcryptd workqueues") introduced new dm-crypt 'no_read_workqueue' and 'no_write_workqueue' flags. Add documentation to admin guide for them. Fixes: 39d42fa96ba1 ("dm crypt: add flags to optionally bypass kcryptd workqueues") 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-crypt.rst8
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/admin-guide/device-mapper/dm-crypt.rst b/Documentation/admin-guide/device-mapper/dm-crypt.rst
index 8f4a3f889d43..40dc2df58cd5 100644
--- a/Documentation/admin-guide/device-mapper/dm-crypt.rst
+++ b/Documentation/admin-guide/device-mapper/dm-crypt.rst
@@ -121,6 +121,14 @@ submit_from_crypt_cpus
thread because it benefits CFQ to have writes submitted using the
same context.
+no_read_workqueue
+ Bypass dm-crypt internal workqueue and process read requests synchronously.
+
+no_write_workqueue
+ Bypass dm-crypt internal workqueue and process write requests synchronously.
+ This option is automatically enabled for host-managed zoned block devices
+ (e.g. host-managed SMR hard-disks).
+
integrity:<bytes>:<type>
The device requires additional <bytes> metadata per-sector stored
in per-bio integrity structure. This metadata must by provided