Dear John (and freebsd-stable),
In message <201108311334.10804....@freebsd.org>, John Baldwin
<j...@freebsd.org> writes
I'd like some folks to test a patch to the mfi(4) driver that may help to
address issues several folks have reported. The patch does two things, first
it adds some dummy reads of PCI registers when checking device status in the
interrupt handler to "flush" the writes to ACK interrupts. The Linux
megaraid-sas driver uses this approach and some folks have tested a patch from
Scott Long which had a somewhat similar effect. Second, it enables the use of
MSI-X interrupts for many newer devices.
I've installed this patch on my Dell PowerEdge 2950 III with a PERC 6/i
controller, which is running 8.2-RELEASE. So far all is working well.
Is there any hope of MSI-X support for this device? It's 0x0060 - a
SAS1078R - so is deliberately excluded from MSI-X by this patch. The
system appears capable of MSI-X operation, but there might be a silicon
bug I'm not aware of or extra code needed that is not provided by this
patch.
With best wishes,
David
--
David Wood
da...@wood2.org.uk
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