> Am 23.04.2015 um 13:08 schrieb Christian Borntraeger <borntrae...@de.ibm.com>:
> 
> From: Martin Schwidefsky <schwidef...@de.ibm.com>
> 
> Replacing a 2K page table with a 4K page table while a VMA is active
> for the affected memory region is fundamentally broken. Rip out the
> page table reallocation code and replace it with a simple system
> control 'vm.allocate_pgste'. If the system control is set the page
> tables for all processes are allocated as full 4K pages, even for
> processes that do not need it.
> 
> Signed-off-by: Martin Schwidefsky <schwidef...@de.ibm.com>
> Signed-off-by: Christian Borntraeger <borntrae...@de.ibm.com>

Couldn't you make this a hidden kconfig option that gets automatically selected 
when kvm is enabled? Or is there a non-kvm case that needs it too?


Alex

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