Re: [Xen-devel] xen unstable crashes ...

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 19 May 2005, at 18:07, Gerd Knorr wrote:

> > STACK_SIZE is 2 pages (because STACK_ORDER is 1). So it's not such a
> > simple bug. :-(
> Ok, two pages.  That makes the upper limit ff105000, whereas the
> stack ptr was ff105<something>.  Still outside the stack frame ;)
Stupid me. And I see the bug. The macros in asm/current.h depend on a 
STACK_ORDER-aligned stack, or bad things happen. 0x103000 is not an 
even page boundary. x86/64 has the same problem. It all just works for 
non-boot cpus because the page allocator guarantees sufficient 
alignment.
I'll check in a fix, and add a bold comment.... thanks!

 -- Keir


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