Re: [PATCH part1 v6 4/6] x86/mem-hotplug: Support initialize page tables in bottom-up

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Hey,

On Thu, Oct 10, 2013 at 10:24:09AM -0600, Toshi Kani wrote:
> > We're going round and round.  You're saying that using SRAT isn't
> > worse than what came before while failing to illustrate how committing
> > to invasive changes would eventually lead to something better.  "it
> > isn't worse" isn't much of an argument.
> 
> We did avoid moving up the ACPI table init function per your suggestion.
> I guess I do not understand why you still concerned about using SRAT...

As you wrote above, SRAT is not enough to support device granularity.
We need to parse the device hierarchy too before setting up page
tables and one of the previous arguments was "it's only SRAT".  It
doesn't instill confidence when there doesn't seem to be much long
term planning going on especially as the general quality of the
patches isn't particularly high.  I find it difficult to believe that
this effort as it currently stands is likely to reach full solution
and as such it feels much safer to opt for a simpler, less dangerous
approach for immedate use, for which either approach doesn't make much
of difference.

Thanks.

-- 
tejun

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