Re: [PATCH 0/4] Swapping

[Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>]

Anthony Liguori wrote:
>>> What I don't understand, is how we can have something like
>>> mmu_unshadow() called automatically when an mmap() is initiated from
>>> userspace.  We could just add an ioctl() to do it from userspace but
>>> I think it would be nicer if it Just Worked.
>>>   
>>
>> Behold the magic of pte notifiers!  Every time the host touches a
>> host page table entry, it calls kvm which zaps the corresponding
>> shadow pte entries and invalidates any tlb entries in running vcpus.
>
> /me bows down to the greatness of pte notifiers
>
> So yeah, that would solve the problem nicely.  Are you planning on
> resubmitting those patches or did they end up in Linus' tree?

There's a lot of work before pte notifers are linusable.

-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.


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