Re: fd3e45436660 ("ACPI / NUMA: ia64: Parse all entries of SRAT memory affinity table")

[Ganapatrao Kulkarni]

Hi Michal


On Wed, May 9, 2018 at 5:54 PM, Michal Hocko <mhocko@xxxxxxxxxx> wrote:
> On Wed 11-04-18 12:48:32, Michal Hocko wrote:
>> Hi,
>> my attention was brought to the %subj commit and either I am missing
>> something or the patch is quite dubious. What is it actually trying to
>> fix? If a BIOS/FW provides more memblocks than the limit then we would
>> get misleading numa topology (numactl -H output) but is the situation
>> much better with it applied? Numa init code will refuse to init more
>> memblocks than the limit and falls back to dummy_numa_init (AFAICS)
>> which will break the topology again and numactl -H will have a
>> misleading output anyway.

IIRC, the MEMBLOCK beyond max limit getting dropped from visible
memory(partial drop from a node).
this patch removed any upper limit on memblocks and allowed to parse
all entries of SRAT.

>>
>> So why is the patch an improvement at all?
>
> ping? I would be tempted to simply revert the patch as a wrong fix.
> --
> Michal Hocko
> SUSE Labs

thanks
Ganapat
sorry, somehow, i have missed your previous email