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Re: 4.8.8 kernel trigger OOM killer repeatedly when I have lots of RAM that should be free

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On Tue, Nov 22, 2016 at 05:14:02PM +0100, Vlastimil Babka wrote:
> On 11/22/2016 05:06 PM, Marc MERLIN wrote:
> > On Mon, Nov 21, 2016 at 01:56:39PM -0800, Marc MERLIN wrote:
> >> On Mon, Nov 21, 2016 at 10:50:20PM +0100, Vlastimil Babka wrote:
> >>>> 4.9rc5 however seems to be doing better, and is still running after 18
> >>>> hours. However, I got a few page allocation failures as per below, but the
> >>>> system seems to recover.
> >>>> Vlastimil, do you want me to continue the copy on 4.9 (may take 3-5 days) 
> >>>> or is that good enough, and i should go back to 4.8.8 with that patch applied?
> >>>> https://marc.info/?l=linux-mm&m=147423605024993
> >>>
> >>> Hi, I think it's enough for 4.9 for now and I would appreciate trying
> >>> 4.8 with that patch, yeah.
> >>
> >> So the good news is that it's been running for almost 5H and so far so good.
> > 
> > And the better news is that the copy is still going strong, 4.4TB and
> > going. So 4.8.8 is fixed with that one single patch as far as I'm
> > concerned.
> > 
> > So thanks for that, looks good to me to merge.
> 
> Thanks a lot for the testing. So what do we do now about 4.8? (4.7 is
> already EOL AFAICS).
> 
> - send the patch [1] as 4.8-only stable. Greg won't like that, I expect.
>   - alternatively a simpler (againm 4.8-only) patch that just outright
> prevents OOM for 0 < order < costly, as Michal already suggested.
> - backport 10+ compaction patches to 4.8 stable
> - something else?

Just wait for 4.8-stable to go end-of-life in a few weeks after 4.9 is
released?  :)

thanks,

greg k-h

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Re: 4.8.8 kernel trigger OOM killer repeatedly when I have lots of  RAM that should be free Vlastimil Babka <vbabka@suse.cz> - 2016-11-21 23:00 +0100
  Re: 4.8.8 kernel trigger OOM killer repeatedly when I have lots of RAM that should be free Marc MERLIN <marc@merlins.org> - 2016-11-21 23:20 +0100
    [PATCH] block,blkcg: use __GFP_NOWARN for best-effort allocations in  blkcg Tejun Heo <tj@kernel.org> - 2016-11-22 00:10 +0100
      Re: [PATCH] block,blkcg: use __GFP_NOWARN for best-effort allocations  in blkcg Vlastimil Babka <vbabka@suse.cz> - 2016-11-22 16:50 +0100
        Re: [PATCH] block,blkcg: use __GFP_NOWARN for best-effort  allocations in blkcg Tejun Heo <tj@kernel.org> - 2016-11-22 18:10 +0100
          Re: [PATCH] block,blkcg: use __GFP_NOWARN for best-effort allocations  in blkcg Linus Torvalds <torvalds@linux-foundation.org> - 2016-11-22 23:20 +0100
            Re: [PATCH] block,blkcg: use __GFP_NOWARN for best-effort allocations  in blkcg Vlastimil Babka <vbabka@suse.cz> - 2016-11-23 10:00 +0100
      Re: [PATCH] block,blkcg: use __GFP_NOWARN for best-effort allocations  in blkcg Jens Axboe <axboe@kernel.dk> - 2016-11-22 17:10 +0100
    Re: 4.8.8 kernel trigger OOM killer repeatedly when I have lots of  RAM that should be free Marc MERLIN <marc@merlins.org> - 2016-11-22 17:10 +0100
      Re: 4.8.8 kernel trigger OOM killer repeatedly when I have lots of  RAM that should be free Vlastimil Babka <vbabka@suse.cz> - 2016-11-22 17:20 +0100
        Re: 4.8.8 kernel trigger OOM killer repeatedly when I have lots of  RAM that should be free Michal Hocko <mhocko@kernel.org> - 2016-11-22 17:30 +0100
          Re: 4.8.8 kernel trigger OOM killer repeatedly when I have lots of  RAM that should be free Marc MERLIN <marc@merlins.org> - 2016-11-22 17:50 +0100
        Re: 4.8.8 kernel trigger OOM killer repeatedly when I have lots of  RAM that should be free Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-11-22 17:40 +0100
        Re: 4.8.8 kernel trigger OOM killer repeatedly when I have lots of  RAM that should be free Linus Torvalds <torvalds@linux-foundation.org> - 2016-11-22 20:40 +0100
          Re: 4.8.8 kernel trigger OOM killer repeatedly when I have lots of  RAM that should be free Michal Hocko <mhocko@kernel.org> - 2016-11-23 07:40 +0100
            Re: 4.8.8 kernel trigger OOM killer repeatedly when I have lots of RAM that should be free "Hillf Danton" <hillf.zj@alibaba-inc.com> - 2016-11-23 08:00 +0100
              Re: 4.8.8 kernel trigger OOM killer repeatedly when I have lots of  RAM that should be free Michal Hocko <mhocko@kernel.org> - 2016-11-23 08:10 +0100
            Re: 4.8.8 kernel trigger OOM killer repeatedly when I have lots of  RAM that should be free Vlastimil Babka <vbabka@suse.cz> - 2016-11-23 11:20 +0100
        Re: 4.8.8 kernel trigger OOM killer repeatedly when I have lots of  RAM that should be free Simon Kirby <sim@hostway.ca> - 2016-11-22 23:10 +0100

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