Re: [PATCH] KVM: s390: remove delayed reallocation of page tables for KVM

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




> Am 23.04.2015 um 13:08 schrieb Christian Borntraeger <borntraeger@xxxxxxxxxx>:
> 
> From: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
> 
> 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 <schwidefsky@xxxxxxxxxx>
> Signed-off-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>

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

--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [KVM ARM]     [KVM ia64]     [KVM ppc]     [Virtualization Tools]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Questions]     [Linux Kernel]     [Linux SCSI]     [XFree86]
  Powered by Linux