[Bug 60644] MPT2SAS drops all HDDs when under high I/O

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=60644

--- Comment #40 from Tommy Apel <tommyapeldk@gmail.com> ---
Hello all,

I've actually been playing around with this a bit more and found out that the
PERR and SERR might only hide problem for a while, sustained load over longer
periods (4-5 hours) will still unfold in a crash, I have re-enabled the PERR
and SERR and I'm running with ASPM enabled aswell, but the change that made it
all go away was that to switch encoding on the PCIe to use "Above 4G", now the
thing I noted was aswell that I had changed from using a PCIe2.0 SAS HBA to a
PCIe3.0 SAS HBA and the problem manifested it self only with the latter, anoter
thing to note is that I have mixed PCIe2 and PCIe3 devices with a PCIe3 capable
cpu.

/Tommy

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