Ingo Molnar wrote:
quoted text
> unfortunately they dont solve it:
>
>  [   92.042586] Freeing unused kernel memory: 328k freed
>  [   92.091838] khelper used greatest stack depth: 6244 bytes left
>  [   92.281738] init[1]: segfault at 00000004 ip 49471cbb sp bff8dbb0 error 4
>  [   92.288761] init[1]: segfault at 00000004 ip 49471cbb sp bff8dbb0 error 4
>  [   92.295763] init[1]: segfault at 00000004 ip 49471cbb sp bff8dbb0 error 4
>  [...]
>  [   97.312484] printk: 611046 messages suppressed.
>
> 32-bit, PAE and RAM above 4GB seems to be enough to trigger that bug.
>   

Bum.  We established that once you fix the accessors+sign extension bug, 
there's another bug somewhere later on in the series.  Any chance you 
could move "x86/pgtable: fix constant sign extension problem" to be just 
after "x86/pgtable: unify pagetable accessors" and bisect the following 
patches?

Thanks,
    J
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