Re: [Xen-devel] Crash on boot with 2.6.37-rc8-git3

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Tue, 25 Jan 2011, Ian Campbell wrote:
> > unless I am very confused
> > 
> > map[i].size -= (map[i].size + map[i].addr) % PAGE_SIZE
> > 
> > is not the same as:
> > 
> > as map[i].size &= ~(PAGE_SIZE-1): 
> > 
> > because it also takes into account the possibility that map[i].addr is
> > not page aligned.
> 
> Oh yes, I didn't notice that aspect of it.
> 
> >  It doesn't move map[i].addr upward but still makes sure that
> > the region ends at a page boundary anyway.
> 
> Which returns to my second question ;-) Why do we not need to align addr
> too?

My machine can boot fine with a map[i].addr not page aligned.

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