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| author | Yu Watanabe <watanabe.yu+github@gmail.com> | 2019-03-11 14:04:06 +0900 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2019-03-13 09:48:50 +0100 |
| commit | 2c65512ee7dede245b72110a12264094f475427c (patch) | |
| tree | c7d238516fd000414d8fbe4ba2f9ac022e989ec8 /man/crypttab.xml | |
| parent | 05044ebff90e4bc8bd5a546ba37e3a863c7b3dfc (diff) | |
| download | systemd-2c65512ee7dede245b72110a12264094f475427c.tar.gz | |
cryptsetup: add same-cpu-crypt and submit-from-crypt-cpus options
Closes #11946.
Diffstat (limited to 'man/crypttab.xml')
| -rw-r--r-- | man/crypttab.xml | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/man/crypttab.xml b/man/crypttab.xml index 3574ce00da..f0d8030e12 100644 --- a/man/crypttab.xml +++ b/man/crypttab.xml @@ -225,6 +225,26 @@ </varlistentry> <varlistentry> + <term><option>same-cpu-crypt</option></term> + + <listitem><para>Perform encryption using the same cpu that IO was submitted on. The default is to use + an unbound workqueue so that encryption work is automatically balanced between available CPUs.</para> + <para>This requires kernel 4.0 or newer.</para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>submit-from-crypt-cpus</option></term> + + <listitem><para>Disable offloading writes to a separate thread after encryption. There are some + situations where offloading write bios from the encryption threads to a single thread degrades + performance significantly. The default is to offload write bios to the same thread because it benefits + CFQ to have writes submitted using the same context.</para> + <para>This requires kernel 4.0 or newer.</para> + </listitem> + </varlistentry> + + <varlistentry> <term><option>skip=</option></term> <listitem><para>How many 512-byte sectors of the encrypted data to skip at the |