10.1 NVMe kernel panic

[Jim Harris]

On Thu, May 21, 2015 at 8:33 AM, Sean Kelly <smkelly at smkelly.org> wrote:

> Greetings.
>
> I have a Dell R630 server with four of Dell’s 800GB NVMe SSDs running
> FreeBSD 10.1-p10. According to the PCI vendor, they are some sort of
> rebranded Samsung drive. If I boot the system and then load nvme.ko and
> nvd.ko from a command line, the drives show up okay. If I put
>         nvme_load=“YES”
>         nvd_load=“YES”
> in /boot/loader.conf, the box panics on boot:
>         panic: nexus_setup_intr: NULL irq resource!
>
> If I boot the system with “Safe Mode: ON” from the loader menu, it also
> boots successfully and the drives show up.
>
> You can see a full ‘boot -v’ here:
> http://smkelly.org/stuff/nvme-panic.txt <
> http://smkelly.org/stuff/nvme-panic.txt>
>
> Anyone have any insight into what the issue may be here? Ideally I need to
> get this working in the next few days or return this thing to Dell.
>

Hi Sean,

Can you try adding hw.nvme.force_intx=1 to /boot/loader.conf?

I suspect you are able to load the drivers successfully after boot because
interrupt assignments are not restricted to CPU0 at that point - see
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=199321 for a related
issue.  Your logs clearly show that vectors were allocated for the first 2
NVMe SSDs, but the third could not get its full allocation.  There is a bug
in the INTx fallback code that needs to be fixed - you do not hit this bug
when loading after boot because bug #199321 only affects interrupt
allocation during boot.

If the force_intx test works, would you able to upgrade your nvme drivers
to the latest on stable/10?  There are several patches (one related to
interrupt vector allocation) that have been pushed to stable/10 since 10.1
was released, and I will be pushing another patch for the issue you have
reported shortly.

Thanks,

-Jim




>
> Thanks!
>
> --
> Sean Kelly
> smkelly at smkelly.org
> http://smkelly.org
>
> _______________________________________________
> freebsd-stable at freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-stable
> To unsubscribe, send any mail to "freebsd-stable-unsubscribe at freebsd.org"