On 11/9/2015 2:15 AM, Hannes Reinecke wrote:
On 11/09/2015 02:57 AM, Sinan Kaya wrote:
The mpt2sas and mpt3sas drivers are spinning forever in
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.
NACK.
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.
Can you go into the detail about which part of the _base_interrupt
function needs to be executed in ISR context and which part can be
queued up to worker thread?
I'm not familiar with the hardware or the code. That's why, I moved the
entire ISR into the thread context.
Cheers,
Hannes
--
Sinan Kaya
Qualcomm Technologies, Inc. on behalf of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a
Linux Foundation Collaborative Project
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