Re: kernel 4.9.86-30 missing mpt2sas module

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On Tue, Mar 06, 2018 at 04:27:05PM +0100, T.Weyergraf wrote:
> Hi
> I am attempting to setup Xen 4.10 with kernel 4.9.86-30 (
> virt7-xen-410-testing, virt7-common-testing ) on CentOS7
> After installing everything, the machine was unable to boot and hung in
> dracut stating it could not find its root device.
> The testsystem I use is a somewhat aged Dell M915 Blade (Quad opteron 61xx),
> using an MPT SAS controller for it's SAS boot drives. Stock CentOS 7 reports
> mpt2sas module being used to access the controller.
> That module is not present in the modules directory of the 4.9.86:
> 4.9.86-30:
> # pwd
> /lib/modules/4.9.86-30.el7.x86_64
> # find . -name "*mpt2*" -print
> #
> stock 3.10.0-693:
> # pwd
> /lib/modules/3.10.0-693.el7.x86_64
> # find . -name "*mpt2*" -print
> ./kernel/drivers/scsi/mpt3sas/mpt2sas.ko.xz
> The fun part is, that according to the shipped config, it should be there:
> # grep MPT2 /boot/config-4.9.86-30.el7.x86_64
> Any idea, what happened? I will try myself to build a new kernel from the
> corresponding source package to check, what went wrong.

Upstream Linux kernel migrated both the mpt2sas and mpt3sas drivers to a single driver: mpt3sas, which should support all the devices.

-- Pasi
> As a side note: anyone here, who tried that combo? I know, it's somewhat
> cutting edge, but as I am finally looking into some sort of modern
> Xen4CentOS setup to replace our aged setup in our infrastructure, i thought
> i'd rather settle with something as new as possible to avoid running into
> "not supported anymore soon" issues. Check hypervisor support matrix on
> frontpage
> Regards
> Thomas Weyergraf
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