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Re: [RFC 1/3] oom, sysrq: Skip over oom victims and killed tasks

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On Fri, 15 Jan 2016 11:12:18 +0100
Michal Hocko <mhocko@kernel.org> wrote:

> On Thu 14-01-16 13:51:16, David Rientjes wrote:
> > I think it's time to kill sysrq+F and I'll send those two patches
> > unless there is a usecase I'm not aware of.
> 
> I have described one in the part you haven't quoted here. Let me repeat:
> : Your system might be trashing to the point you are not able to log in
> : and resolve the situation in a reasonable time yet you are still not
> : OOM. sysrq+f is your only choice then.
> 
> Could you clarify why it is better to ditch a potentially usefull
> emergency tool rather than to make it work reliably and predictably?

Even if it doesn't work reliably and predictably it is *still* better
than removing it as it works currently. Today we have "might save you a
reboot", the removal turns it into "you'll have to reboot". That's a
regression.

Alan

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[RFC 0/3] oom: few enahancements Michal Hocko <mhocko@kernel.org> - 2016-01-12 22:10 +0100
  [RFC 2/3] oom: Do not sacrifice already OOM killed children Michal Hocko <mhocko@kernel.org> - 2016-01-12 22:10 +0100
    Re: [RFC 2/3] oom: Do not sacrifice already OOM killed children David Rientjes <rientjes@google.com> - 2016-01-13 01:50 +0100
      Re: [RFC 2/3] oom: Do not sacrifice already OOM killed children Michal Hocko <mhocko@kernel.org> - 2016-01-13 10:40 +0100
        Re: [RFC 2/3] oom: Do not sacrifice already OOM killed children David Rientjes <rientjes@google.com> - 2016-01-14 01:50 +0100
  [RFC 1/3] oom, sysrq: Skip over oom victims and killed tasks Michal Hocko <mhocko@kernel.org> - 2016-01-12 22:10 +0100
    Re: [RFC 1/3] oom, sysrq: Skip over oom victims and killed tasks David Rientjes <rientjes@google.com> - 2016-01-13 01:50 +0100
      Re: [RFC 1/3] oom, sysrq: Skip over oom victims and killed tasks Michal Hocko <mhocko@kernel.org> - 2016-01-13 10:40 +0100
        Re: [RFC 1/3] oom, sysrq: Skip over oom victims and killed tasks David Rientjes <rientjes@google.com> - 2016-01-14 01:40 +0100
          Re: [RFC 1/3] oom, sysrq: Skip over oom victims and killed tasks Michal Hocko <mhocko@kernel.org> - 2016-01-14 12:10 +0100
            Re: [RFC 1/3] oom, sysrq: Skip over oom victims and killed tasks David Rientjes <rientjes@google.com> - 2016-01-14 23:00 +0100
              Re: [RFC 1/3] oom, sysrq: Skip over oom victims and killed tasks Michal Hocko <mhocko@kernel.org> - 2016-01-15 11:20 +0100
                Re: [RFC 1/3] oom, sysrq: Skip over oom victims and killed tasks One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk> - 2016-01-15 16:40 +0100
                Re: [RFC 1/3] oom, sysrq: Skip over oom victims and killed tasks David Rientjes <rientjes@google.com> - 2016-01-20 00:10 +0100
                Re: [RFC 1/3] oom, sysrq: Skip over oom victims and killed tasks David Rientjes <rientjes@google.com> - 2016-01-20 00:00 +0100
                Re: [RFC 1/3] oom, sysrq: Skip over oom victims and killed tasks Michal Hocko <mhocko@kernel.org> - 2016-01-20 11:00 +0100
                Re: [RFC 1/3] oom, sysrq: Skip over oom victims and killed tasks David Rientjes <rientjes@google.com> - 2016-01-21 01:10 +0100
                Re: [RFC 1/3] oom, sysrq: Skip over oom victims and killed tasks Michal Hocko <mhocko@kernel.org> - 2016-01-21 10:20 +0100
  [RFC 3/3] oom: Do not try to sacrifice small children Michal Hocko <mhocko@kernel.org> - 2016-01-12 22:10 +0100
    Re: [RFC 3/3] oom: Do not try to sacrifice small children David Rientjes <rientjes@google.com> - 2016-01-13 02:00 +0100
      Re: [RFC 3/3] oom: Do not try to sacrifice small children Michal Hocko <mhocko@kernel.org> - 2016-01-13 10:50 +0100
        Re: [RFC 3/3] oom: Do not try to sacrifice small children David Rientjes <rientjes@google.com> - 2016-01-14 01:50 +0100

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