This parameter, available on x86 systems only, controls the number of Extended Message Signaled Interrupts (MSI-X) that a device instance can allocate. Due to an existing system limitation, the default value is 2. You can increase the number of MSI-X interrupts that a device instance can allocate by increasing the value of this parameter. This parameter can be set either by editing the /etc/system file or by setting it with mdb before the device driver attach occurs.
Signed integer
2
1 to 16
Yes
None
To increase the number of MSI-X interrupts that a device instance can allocate. However, if you increase the number of MSI-X interrupts that a device instance can allocate, adequate interrupts might not be available to satisfy all allocation requests. If this happens, some devices might stop functioning or the system might fail to boot. Reduce the value or remove the parameter in this case.
Unstable
For information, see ddi_msix_alloc_limit (Solaris 10 Release and OpenSolaris 2009.06 Release).