Bug#901420: ksoftirqd/0: page allocation failure: order:1, mode:0x2284020(GFP_ATOMIC|__GFP_COMP|__GFP_NOTRACK)
A few days ago the oom_killer killed the sshd on my QNAP NAS, so I had
to hard-reboot it. Following that, I uninstalled the v4 kernel and
reinstalled the v3 kernel that had previously been installed from
jessie-security. The machine is now back to running its same workload
now without any messages to dmesg or /var/log about memory.
No other software, including libc, has changed on the system.
It seems pretty clear I won't be able to use a v4 kernel on this
hardware because something has changed in its memory management. I
believe it's a bug for a new kernel to behave differently under the same
workload on the same hardware.
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