System and method for supporting live migration of virtual machines based on an extended host channel adaptor (HCA) model

A method for supporting virtual machine live migration in a network, comprising:

• associating a first fabric adaptor of a first host with a first plurality of virtual host channel adapters (vHCAs), and wherein each of said first plurality of virtual host channel adapter (vHCA) is associated with a separate first queue pair (QP) space;
• associating a second fabric adaptor of a second host with a second plurality of virtual host channel adapters (vHCAs), and wherein each of said second plurality of virtual host channel adapter (vHCA) is associated with a second queue pair (QP) space:
• performing, a live migration of a virtual machine from said first host to said second host, wherein
• prior to migration said virtual machine is attached with a said first virtual host channel adapter (vHCA) of the first plurality of vHCA that is associated with a queue pair (QP) in a said queue pair (QP) space and is assigned a unique Local Identifier (LID) for addressing the first vHCA, and
• after migration said virtual machine is attached with a said second virtual host channel adapter (vHCA) of the second plurality of vHCA that is associated with said queue pair (QP) and is assigned said same unique Local Identifier (LID) for addressing the second vHCA;
• and
• signaling, via said queue pair (QP), a peer QP about the live migration and provide said peer QP with address information after migration.

A non-transitory machine readable storage medium having instructions stored thereon for supporting virtual machine live migration in a network, which instructions, when executed, cause a system to perform steps comprising:

• associating a first fabric adaptor of a first host with a first plurality of virtual host channel adapters (vHCAs), and wherein each of said first plurality of virtual host channel adapter (vHCA) is associated with a first queue pair (QP) space;
• associating a second fabric adaptor of a second host with a second plurality of virtual host channel adapters (vHCAs), and wherein each of said second plurality of virtual host channel adapter (vHCA) is associated with a second queue pair (QP) space;
• performing a live migration of a virtual machine from said first host to said second host, wherein
• prior to migration said virtual machine is attached with a first virtual host channel adapter (vHCA) of the first plurality of vHCA that is associated with a queue pair (QP) in a said queue pair (QP) space and is assigned a unique Local Identifier (LID) for addressing the first vHCA, and
• after migration said virtual machine is attached with a second virtual host channel adapter (vHCA) of the second plurality of vHCA that is associated with said queue pair (QP) and is assigned said same unique Local Identifier (LID) for addressing the second vHCA;
• and
• signaling, via said queue pair (QP), a peer QP about the live migration and provide said peer QP with address information after migration.