Still OOM problems with 4.9er kernels

From	Gerhard Wiesinger <lists@wiesinger.com>
Newsgroups	linux.kernel
Subject	Still OOM problems with 4.9er kernels
Date	2016-11-30 08:20 +0100
Message-ID	<sJ7lo-31Q-11@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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Hello,

I'm having out of memory situations with my "low memory" VMs in KVM 
under Fedora (Kernel 4.7, 4.8 and also before). They started to get more 
and more sensitive to OOM. I recently found the following info:

https://marius.bloggt-in-braunschweig.de/2016/11/17/linuxkernel-4-74-8-und-der-oom-killer/
https://www.spinics.net/lists/linux-mm/msg113661.html

Therefore I tried the latest Fedora kernels: 4.9.0-0.rc6.git2.1.fc26.x86_64

But OOM situation is still very easy to reproduce:

1.) VM with 128-384MB under Fedora 25

2.) Having some processes run without any load (e.g. Apache)

3.) run an update with: dnf clean all; dnf update

4.) dnf python process get's killed


Please make the VM system working again in Kernel 4.9 and to use swap 
again correctly.

Thnx.

Ciao,

Gerhard

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Still OOM problems with 4.9er kernels Gerhard Wiesinger <lists@wiesinger.com> - 2016-11-30 08:20 +0100
  Re: Still OOM problems with 4.9er kernels Gerhard Wiesinger <lists@wiesinger.com> - 2016-11-30 08:30 +0100
    Re: Still OOM problems with 4.9er kernels Gerhard Wiesinger <lists@wiesinger.com> - 2016-12-09 08:10 +0100
      Re: Still OOM problems with 4.9er kernels Michal Hocko <mhocko@kernel.org> - 2016-12-09 14:50 +0100
        Re: Still OOM problems with 4.9er kernels Gerhard Wiesinger <lists@wiesinger.com> - 2016-12-09 17:00 +0100
          Re: Still OOM problems with 4.9er kernels Gerhard Wiesinger <lists@wiesinger.com> - 2016-12-09 17:10 +0100
          Re: Still OOM problems with 4.9er kernels Michal Hocko <mhocko@kernel.org> - 2016-12-09 17:10 +0100
            Re: Still OOM problems with 4.9er kernels Gerhard Wiesinger <lists@wiesinger.com> - 2016-12-09 18:10 +0100
              Re: Still OOM problems with 4.9er kernels Michal Hocko <mhocko@kernel.org> - 2016-12-09 18:40 +0100
                Re: Still OOM problems with 4.9er kernels Gerhard Wiesinger <lists@wiesinger.com> - 2016-12-09 19:10 +0100
                Re: Still OOM problems with 4.9er kernels Vlastimil Babka <vbabka@suse.cz> - 2016-12-09 22:50 +0100
                Re: Still OOM problems with 4.9er kernels Gerhard Wiesinger <lists@wiesinger.com> - 2016-12-10 15:00 +0100
        Re: Still OOM problems with 4.9er kernels Gerhard Wiesinger <lists@wiesinger.com> - 2016-12-09 17:10 +0100

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