Re: [RFC] Arch option to touch newly allocated pages

yodaiken
2002-03-07T14:04:59Z

On Thu, Mar 07, 2002 at 02:36:08PM +0100, Daniel Phillips wrote:
> On March 7, 2002 02:49 pm, Alan Cox wrote:
> > Jeff Dike Apparently wrote
> > > caller. This is actually wrong because in this failure case, it effectively
> > > changes the semantics of GFP_USER, GFP_KERNEL, and the other blocking GFP_*
> > > allocations to GFP_ATOMIC. And that's what forced UML to segfault the
> > > compilations.
> >
> > GFP_KERNEL will sometimes return NULL.
>
> Sad but true. IMHO we are on track to fix that in this kernel cycle, with
> better locked/dirty accounting and rmap to forcibly unmap pages when necessary.

Why is that a fix? And how can it work?

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Victor Yodaiken
Finite State Machine Labs: The RTLinux Company.
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