On Thu, Nov 10, 2005 at 03:16:30PM +0200, Michael S. Tsirkin wrote:
> Quoting Gleb Natapov <[email protected]>:
> > Subject: Re: Nick's core remove PageReserved broke vmware...
> >
> > On Thu, Nov 10, 2005 at 02:48:53PM +0200, Michael S. Tsirkin wrote:
> > > > Also perhapse we should skip VM_SHARED VMAs?
> > >
> > > Why?
> > >
> > They will work correctly across fork().
>
> So why would I call madvise on such a VMA?
>
Because libraries such as MPI can't figure out if memory is shared or not.
And madvise is just advise, so if kernel knows better it may ignore that
advise.
--
Gleb.
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