Re: [RFC] page-table walkers vs memory order

[Peter Zijlstra]

On Wed, 2012-07-25 at 15:09 -0700, Hugh Dickins wrote:
> We find out after it hits us, and someone studies the disassembly -
> if we're lucky enough to crash near the origin of the problem. 

This is a rather painful way.. see

  https://lkml.org/lkml/2009/1/5/555

we were lucky there in that the lack of ACCESS_ONCE() caused an infinite
loop so we knew exactly where we got stuck.


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