Re: [PATCH 0/5] Rewrite Motorola MMU page-table layout

[Michael Schmitz]

Peter,

On 30/01/20 9:16 PM, Peter Zijlstra wrote:
> Hi Michael,
>
> On Thu, Jan 30, 2020 at 08:31:13PM +1300, Michael Schmitz wrote:
>
> > Not much difference:
> >
> >               total       used       free     shared    buffers     cached
> > Mem:         10712      10120        592          0       1860       2276
> > -/+ buffers/cache:       5984       4728
> > Swap:      2097144       1552    2095592
> >
> >
> > vs. vanilla 5.5rc5:
> >               total       used       free     shared    buffers     cached
> > Mem:         10716      10104        612          0       1588       2544
> > -/+ buffers/cache:       5972       4744
> > Swap:      2097144       1296    2095848
> >
> > By sheer coincidence, the boot with your patch series happened to run a full
> > filesystem check on the root filesystem, so I'd say it got a good workout
> > re: paging and swapping (even though it's just a paltry 4 GB).
> Sweet!, can I translate this into a Tested-by: from you?

If the test coverage is sufficient, you may certainly do that.

Cheers,

ÂÂÂ Michael

> > Haven't tried any VM stress testing yet (not sure what to do for that; it's
> > been years since I tried that sort of stuff).
> I think, this not being SMP, doing what you just did tickled just about
> everything there is.
>
> There is one more potential issue with MMU-gather / TLB invalidate on
> m68k (and a whole bunch of other archs) and I have patches for that
> (although I now need to redo the m68k one.
>
> Meanwhile the build robot gifted me with a build issue, and Will had
> some nitpicks, so I'll go respin and repost these patches.