On 05/24/2013 01:39 PM, Xiao Guangrong wrote: >>> if (kvm_mmu_prepare_zap_page(sp, list)) >>> hlist_del(sp->hlist); >>> >>> Or, i missed your suggestion? >> My assumption is that we can leave obsolete shadow pages on hashtable >> till commit_zap time. > > Ah, i see. > > Yes, i agree with your idea. I think we can only skip the obsolete-and-invalid > page since the obsolete-but-unzapped page still affects the mmu's behaviour, > for example, it can cause page write-protect, kvm_mmu_unprotect_page() > can not work by skipping unzapped-obsolete pages.
kvm_mmu_unprotect_page() can work, we can skip obsolete pages too when detect whether need to write-protect a page, it is easier to make the page become writable when zapping obsolete pages. Will update it following your idea, sorry for my noise. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
