Re: [RFC PATCH v6] Documentation/arch: Add Documentation/arch-features.txt

[Ingo Molnar]

* Paul Mackerras <paulus@xxxxxxxxx> wrote:

> On Wed, May 13, 2015 at 03:48:42PM +0200, Ingo Molnar wrote:
> > 
> > Updated patch attached - I've added a few more features to the last 
> > table, and restructured the explanations, now every feature 
> > description also lists the Kconfig variable that it's tracking, e.g.:
> > 
> >       irq time acct: HAVE_IRQ_TIME_ACCOUNTING
> 
> Regarding that one specifically, as far as I can see, 
> HAVE_IRQ_TIME_ACCOUNTING is only relevant for tick-based time 
> accounting.  If you have CONFIG_VIRT_CPU_ACCOUNTING you get accurate 
> irq time accounting with or without HAVE_IRQ_TIME_ACCOUNTING.  So 
> how about making this one:
> 
> 	irq time acct: HAVE_IRQ_TIME_ACCOUNTING || VIRT_CPU_ACCOUNTING
> 
> That would make the "irq time acct" entry for powerpc be "ok".

Yeah, indeed.

I fixed that, PowerPC now looks like this:

      irq time acct:-------------------------------------------.
                THP:------------------------------------.      |
   gcov profile all:-----------------------------.      |      |
    rwsem optimized:----------------------.      |      |      |
   queued spinlocks:---------------.      |      |      |      |
     queued rwlocks:--------.      |      |      |      |      |
     numa balancing:-.      |      |      |      |      |      |
                     |      |      |      |      |      |      |
--------------------------------------------------------------------
  powerpc         |  ok  | TODO | TODO | TODO |  ok  |  ok  |  ok  |

Thanks,

	Ingo
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