defined a search view fro my module and declared its id in search_view_id in the menu creation.
everything seems to be correct but the search view is not properly displayed. It is displayed below the tree view.
<record id="open_search_form" model="ir.actions.act_window">
<field name="name">Users</field>
<field name="res_model">general.users</field>
<field name="view_type">tree</field>
<field name="view_mode">tree,search</field>
<field name="domain">[]</field>
<field name="context">{}</field>
<field name="search_view_id" ref="general_search_view"/>
</record>
in view_mode I have to specify search or not.
Do this : <field name="view_mode">tree</field>