[Bug 204789] Boot failure with more than 256G of memory on Power9 with 4K pages & Hash MMU

bugzilla-daemon at bugzilla.kernel.org bugzilla-daemon at bugzilla.kernel.org
Wed Oct 2 02:01:53 AEST 2019


https://bugzilla.kernel.org/show_bug.cgi?id=204789

--- Comment #11 from Cameron (cam at neo-zeon.de) ---
grep RAM /proc/iomem
00000000-3fffffffff : System RAM

The system has 16 dimm slots, all are populated. Unfortunately, I will 
not have physical to access to the box in the foreseeable future.

Aneesh appears to be correct in that this issue started with 0034d395f89d.

On 10/1/19 3:04 AM, bugzilla-daemon at bugzilla.kernel.org wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=204789
>
> --- Comment #10 from Michael Ellerman (michael at ellerman.id.au) ---
> Can you boot a good kernel and do:
>
> $ sudo grep RAM /proc/iomem
>
> And paste the output. Just to confirm what your memory layout is.
>
> What arrangement of DIMMs do you have? It's possible you could work around
> the
> bug by changing that, depending on how many DIMMs and slots you have.
>

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