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

From Michal Hocko <mhocko@kernel.org>
Newsgroups linux.kernel
Subject Re: [RFC] oom, but there is enough memory
Date 2016-03-31 13:00 +0200
Message-ID <riIuu-3Hf-5@gated-at.bofh.it> (permalink)
References <riGVK-2I1-55@gated-at.bofh.it> <riHf5-2VE-39@gated-at.bofh.it> <riHf5-2VE-37@gated-at.bofh.it>
Organization linux.* mail to news gateway

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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
callback.
-- 
Michal Hocko
SUSE Labs

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Thread

[RFC] oom, but there is enough memory Xishi Qiu <qiuxishi@huawei.com> - 2016-03-31 11:20 +0200
  Re: [RFC] oom, but there is enough memory Xishi Qiu <qiuxishi@huawei.com> - 2016-03-31 11:40 +0200
    Re: [RFC] oom, but there is enough memory Michal Hocko <mhocko@kernel.org> - 2016-03-31 13:00 +0200
  Re: [RFC] oom, but there is enough memory Michal Hocko <mhocko@kernel.org> - 2016-03-31 11:40 +0200

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