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

[M A Young <m.a.young@xxxxxxxxxxxx>]

On Tue, 18 Jan 2011, M A Young wrote:

> My next theory is that the issue is that the system is an alignment issue. 
> The NODE DATA is put in the range 00000000df659800 to 00000000df66d7ff (the 
> top end of the second "usable" chunk) and the problem come when it tries to 
> write to the final 2K piece (00000000df66d000 to 00000000df66d800 - 
> 00000000df66d000 occurs on the stack) which hasn't been initialized properly 
> because it isn't a 4K piece.
> Does this sound plausible?
Further experiments confirm that it is this 2K piece causing the problem - 
if I reserve the 2K chunk in the same was that NODE DATA is reserved 
(though without zeroing it) the system boots, if I reduce this to 
reserving only 1K then it doesn't.
        Michael Young

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