Re: [RFC] oom, but there is enough memory

From: Michal Hocko
Date: Thu Mar 31 2016 - 06:57:07 EST

On Thu 31-03-16 17:38:06, Xishi Qiu wrote:
> Hi Michal,
> It's arm64, so DMA is [0-4G], and Normal is [4G-]

I wasn't aware of that. Thanks for the clarification.

> Is that something wrong with the RAM hardware, then trigger the problem?

This is hard to tell but I would try to check which of the page fault
path has returned with VM_FAULT_OOM. This might be a wrong .fault
Michal Hocko