2008/4/4, Marcelo Tosatti <[EMAIL PROTECTED]>:
>
>  Zdenek reported a bug where a looping "dmsetup status" eventually hangs
>  on SMP guests.
>
>  The problem is that kvm_mmu_get_page() prepopulates the shadow MMU
>  before write protecting the guest page tables. By doing so, it leaves a
>  window open where the guest can mark a pte as present while the host has
>  shadow cached such pte as "notrap". Accesses to such address will fault
>  in the guest without the host having a chance to fix the situation.
>

Great - this looks like it has fixed my problems with busy looping
processes - lets see if it will fix other weird behaviours  I'm seeing
with kvm :)

Zdenek

-------------------------------------------------------------------------
Check out the new SourceForge.net Marketplace.
It's the best place to buy or sell services for
just about anything Open Source.
http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace
_______________________________________________
kvm-devel mailing list
kvm-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/kvm-devel

Reply via email to