On 11/09/2015 02:57 AM, Sinan Kaya wrote:
The mpt2sas and mpt3sas drivers are spinning forever inNACK.
their IRQ handlers if there are a lot of jobs queued up
by the PCIe card. This handler is causing spikes for
the rest of the system and sluggish behavior.
Marking all MSI interrupts as non-shared and moving the
MSI interrupts to thread context. This relexes the rest
of the system execution.
If there is a scalability issue when handling interrupts
it should be fixed in the driver directly.
Looking at the driver is should be possible to implement
a worker thread handling the reply descriptor, and having the
interrupt only to fetch the reply descriptor.