Re: /proc/meminfo

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On 03/23/2016 01:41 PM, Peter Steele wrote:
> On 03/23/2016 09:19 AM, Cole Robinson wrote:
>> On 03/23/2016 12:10 PM, Peter Steele wrote:
>>> Has anyone seen this issue? We're running containers under CentOS 7.2 and some
>>> of these containers are reporting incorrect memory allocation in
>>> /proc/meminfo. The output below comes from a system with 32G of memory and
>>> 84GB of swap. The values reported are completely wrong.
>>>
>> There was a meminfo bug here:
>>
>> https://bugzilla.redhat.com/show_bug.cgi?id=1300781
>>
>> The initial report is fixed in git, however the reporter also mentioned the
>> issue you are seeing. I suspect something is going wacky with the memory
>> values we are getting from host cgroups after some period of time. If you can
>> reproduce with Fedora (or RHEL) try filing a bug there
>>
>> - Cole
>>
> It's interesting that the value I see on my containers (9007199254740991) is
> the exact same value that's reported in this Red Hat bug. Clearly that is not
> a coincidence. We did not see this problem in 7.1 so apparently it is
> something introduced in 7.2. For the immediate term it looks like we'll have
> to roll back to 7.1.I'll look into getting it reproduced in Federa or RHEL.
> 

Even if you don't reproduce on RHEL/Fedora, it would be useful if you figure
out exactly what steps it takes to reproduce: is it random, or after a set
amount of time, or after machine suspends, or some manual way to tickle the issue.

Thanks,
Cole

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