descriptor <emphasis>fd</emphasis> from an application to one or more
Lustre servers. Optionally, <emphasis>flags</emphasis> can modify how
the advice will be processed via bitwise-or'd values:</para>
- <itemizedlist><listitem>
- <para><literal>LF_ASYNC</literal>: Clients return to userspace
+ <itemizedlist>
+ <listitem>
+ <para><literal>LF_ASYNC</literal>: Clients return to userspace
immediately after submitting ladvise RPCs, leaving server threads to
handle the advices asynchronously.</para>
- </listitem></itemizedlist>
+ </listitem>
+ <listitem>
+ <para><literal>LF_UNSET</literal>: Unset/clear a previous advice
+ (Currently only supports LU_ADVISE_LOCKNOEXPAND).</para>
+ </listitem>
+ </itemizedlist>
<para>Each of the <emphasis>ladvise</emphasis> elements is an
<emphasis>llapi_lu_ladvise</emphasis> structure, which contains the
following fields:
<entry>
<para>When using advices which support them, the 'lla_value2'
field is used to communicate per-advice flags and can be
- referred to as 'lla_peradvice_flags'.</para>
+ referred to as 'lla_peradvice_flags'. Both LF_ASYNC and
+ LF_UNSET are supported as peradvice flags.</para>
</entry>
</row>
<row>