Michal Nazarewicz [off-list ref] writes:

On Thu, Dec 29 2016, Eric Anholt wrote:

quoted

Michal Hocko [off-list ref] writes:

quoted

This has been already brought up
http://lkml.kernel.org/r/20161130092239.GD18437@dhcp22.suse.cz and there
was a proposed patch for that which ratelimited the output
http://lkml.kernel.org/r/20161130132848.GG18432@dhcp22.suse.cz resp.
http://lkml.kernel.org/r/robbat2-20161130T195244-998539995Z@orbis-terrarum.net

then the email thread just died out because the issue turned out to be a
configuration issue. Michal indicated that the message might be useful
so dropping it completely seems like a bad idea. I do agree that
something has to be done about that though. Can we reconsider the
ratelimit thing?

I agree that the rate of the message has gone up during 4.9 -- it used
to be a few per second.

Sounds like a regression which should be fixed.

This is why I don’t think removing the message is a good idea.  If you
suddenly see a lot of those messages, something changed for the worse.
If you remove this message, you will never know.

quoted

However, if this is an expected path during normal operation,

This depends on your definition of ‘expected’ and ‘normal’.

In general, I would argue that the fact those ever happen is a bug
somewhere in the kernel – if memory is allocated as movable, it should
be movable damn it!

I was taking "expected" from dae803e165a11bc88ca8dbc07a11077caf97bbcb --
if this is a actually a bug, how do we go about debugging it?

I've had Raspbian carrying a patch downstream to remove the error
message for 2 years now, and I either need to get this fixed or get this
patch merged to Fedora and Debian as well, now that they're shipping
some support for Raspberry Pi.