Hi Florin,
The good news is that this is not a kernel bug. The reason for the
kernel messages is that the Ethernet driver tried to allocate some
buffer space and the zoned buddy allocator could not find any free
memory for this - so it dumped out a stack trace and a summary of memory
subsystem to alert you of the fact.
Such reports occur when the zoned buddy allocator memory becomes heavily
fragmented through use and a contiguous block of memory cannot be
allocated, for example, allocation of large receive buffers for Ethernet
Jumbo Frames.
>From your log, the machine was only running for ~13 days, which isn't
that long, so it's surprising that fragmentation occurred so quickly.
This problem can be reduced or eliminated by changing the amount of
available memory for receive buffer allocation, by increasing
/proc/sys/vm/min_free_kbytes, as you have done.
>From this point, I shall mark this as "Won't Fix" as it is not a kernel
bug, but a kernel configuration tweak.
** Changed in: linux (Ubuntu)
Status: In Progress => Won't Fix
--
oops in Hardy Heron -server kernel, with md-lvm-xfs-nfs4
https://bugs.launchpad.net/bugs/198357
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