On Thu, 2012-08-23 at 15:11 +1000, Benjamin Herrenschmidt wrote:
> So we don't do protnone, and now that you mention it, I think that
> means
> that some of our embedded stuff is busted :-)
>
> Basically PROT_NONE turns into _PAGE_PRESENT without _PAGE_USER for
> us.
.../...
> Looks like the S
Hi Benjamin,
On Thu, Aug 23, 2012 at 03:11:00PM +1000, Benjamin Herrenschmidt wrote:
> Basically PROT_NONE turns into _PAGE_PRESENT without _PAGE_USER for us.
Maybe the simplest is to implement pte_numa as !_PAGE_USER too. No
need to clear the _PAGE_PRESENT bit and to alter pte_present() if
clear
On Thu, 2012-08-23 at 00:35 +0200, Andrea Arcangeli wrote:
> I'm actually surprised you don't already check for PROTNONE
> there. Anyway yes this is necessary, the whole concept of NUMA hinting
> page faults is to make the pte not present, and to set another bit (be
> it a reserved bit or PROTNONE
* Benjamin Herrenschmidt [2012-08-23 08:56:34]:
> On Thu, 2012-08-23 at 08:01 +1000, Benjamin Herrenschmidt wrote:
> > On Wed, 2012-08-22 at 16:59 +0200, Andrea Arcangeli wrote:
> > > From: Vaidyanathan Srinivasan
> > >
> > > * PMD flaging is not required in powerpc since large pages
> > >
Hi Benjamin,
On Thu, Aug 23, 2012 at 08:56:34AM +1000, Benjamin Herrenschmidt wrote:
> What I mean here is that it's fine as a proof of concept ;-) I don't
> like it being in a series aimed at upstream...
>
> We can try to flush out the issues, but as it is, the patch isn't
> upstreamable imho.
On Thu, 2012-08-23 at 08:01 +1000, Benjamin Herrenschmidt wrote:
> On Wed, 2012-08-22 at 16:59 +0200, Andrea Arcangeli wrote:
> > From: Vaidyanathan Srinivasan
> >
> > * PMD flaging is not required in powerpc since large pages
> > are tracked in ptes.
> > * Yet to be tested with lar
On Thu, Aug 23, 2012 at 08:01:47AM +1000, Benjamin Herrenschmidt wrote:
> On Wed, 2012-08-22 at 16:59 +0200, Andrea Arcangeli wrote:
> > diff --git a/arch/powerpc/include/asm/pgtable.h
> > b/arch/powerpc/include/asm/pgtable.h
> > index 2e0e411..5f03079 100644
> > --- a/arch/powerpc/include/asm/pgt
On Wed, 2012-08-22 at 16:59 +0200, Andrea Arcangeli wrote:
> From: Vaidyanathan Srinivasan
>
> * PMD flaging is not required in powerpc since large pages
> are tracked in ptes.
> * Yet to be tested with large pages
> * This is an initial patch that partially works
> * knuma_
From: Vaidyanathan Srinivasan
* PMD flaging is not required in powerpc since large pages
are tracked in ptes.
* Yet to be tested with large pages
* This is an initial patch that partially works
* knuma_scand and numa hinting page faults works
* Page migration is yet to b
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