On Thu, Mar 20, 2008 at 02:09:15PM +0200, Avi Kivity wrote: > Marcelo Tosatti wrote: > > Add an ioctl to zap all mappings to a given gfn. This allows userspace > > remove the QEMU process mappings and the page without causing > > inconsistency. > > > > > > I'm thinking of comitting rmap_nuke() to kvm.git, and the rest to the > external module, since this is only needed on kernels without mmu notifiers. > > Andrea, is rmap_nuke() suitable for the mmu notifiers pte clear callback?
There's the usual smp race condition. The tlb must be flushed before the final put_page in rmap_remove. And it can't be safe to call this ioctl before sys_munmap(), so this would be the final put_page. My kvm_unmap_hva takes care of that. ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
