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Re: [patch] mm, zoneinfo: print non-populated zones

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On Fri, 3 Mar 2017, Anshuman Khandual wrote:

> > This patch shows statistics for non-populated zones in /proc/zoneinfo.
> > The zones exist and hold a spot in the vm.lowmem_reserve_ratio array.
> > Without this patch, it is not possible to determine which index in the
> > array controls which zone if one or more zones on the system are not
> > populated.
> 
> Right, its a problem when it does not even display array elements with
> an index value associated with it. But changing the array display will
> break the interface where as displaying non populated zones in the
> /proc/zoneinfo does not break anything.
> 

Precisely.

> The name of the Boolean "populated" is bit misleading IMHO. What I think you
> want here is to invoke the callback if the zone is populated as well as this
> variable is true. The variable can be named something like 'assert_populated'.
> 

I like it, I'll send a v2.  Thanks.

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Thread

[patch] mm, zoneinfo: print non-populated zones David Rientjes <rientjes@google.com> - 2017-03-03 03:30 +0100
  Re: [patch] mm, zoneinfo: print non-populated zones Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2017-03-03 20:50 +0100
    Re: [patch] mm, zoneinfo: print non-populated zones David Rientjes <rientjes@google.com> - 2017-03-03 23:50 +0100
      [patch v2] mm, vmstat: print non-populated zones in zoneinfo David Rientjes <rientjes@google.com> - 2017-03-04 00:00 +0100
        Re: [patch v2] mm, vmstat: print non-populated zones in zoneinfo Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2017-03-04 09:30 +0100
        [patch -mm] mm, vmstat: suppress pcp stats for unpopulated zones in  zoneinfo David Rientjes <rientjes@google.com> - 2017-03-06 23:20 +0100
          Re: [patch -mm] mm, vmstat: suppress pcp stats for unpopulated  zones in zoneinfo Andrew Morton <akpm@linux-foundation.org> - 2017-03-06 23:30 +0100
        Re: [patch v2] mm, vmstat: print non-populated zones in zoneinfo Michal Hocko <mhocko@kernel.org> - 2017-03-08 16:00 +0100

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