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Bug#945213: linux-image-5.2.0-3-amd64: OOM handling broken if hugepages are enabled



Control: reassign -1 src:linux 5.2.17-1
Control: tag -1 moreinfo

On Thu, 2019-11-21 at 08:58 +0000, Anton Ivanov wrote:
> Package: linux-image-5.2.0-3-amd64
> Version: 5.2.17+1
> Severity: important
> 
> Dear Maintainer,
> 
> Dear Maintainer,
> 
> OOM handling appears to be broken in 5.2.17-1 if hugepages are enabled.
> 
> Test system: AMD A4-5300, 40G RAM, no swap, booted disklessly.
> 
> Without hugepages enabled can compile dpdk without any issues. With huge
> pages enabled it will reproducibly OOM when trying to link one of the
> libraries. There are 20G+ free RAM at that point according to free with the
> rest being mostly used as buffers.
> 
> It is sufficient to just enable huge pages to trigger this (2G out of 40G),
> they are not allocated or used by anything. 

What do you mean by "if hugepages are enabled"?  hugetlbfs and THP are
enabled by default.

You need to provide a log of the OOM messages.

Ben.

-- 
Ben Hutchings
I say we take off; nuke the site from orbit.
It's the only way to be sure.


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