Re: Recursive deadlock on die_lock

[Andrew Morton]

Keith Owens wrote:
> 
> ...
> If show_registers() fails (which it does far too often on IA64) then
> the system deadlocks trying to recursively obtain die_lock.  Also
> die_lock is never used outside die(), it should be proc local.
> Suggested fix:
> 

Looks to me like it'll work.  But why does ia64 show_registers()
die so easily?  Can it be taught to validate addresses before
dereferencing them somehow?