On 07/07/2011 02:08 AM, Marcelo Tosatti wrote: >> +static void free_pages_rcu(struct rcu_head *head) >> +{ >> + struct kvm_mmu_page *next, *sp; >> + >> + sp = container_of(head, struct kvm_mmu_page, rcu); >> + while (sp) { >> + if (!list_empty(&sp->link)) >> + next = list_first_entry(&sp->link, >> + struct kvm_mmu_page, link); >> + else >> + next = NULL; >> + kvm_mmu_free_page(sp); >> + sp = next; >> + } >> +} > > There is no need for this while loop. >
The while loop is needed, since many shadow pages can be freed together in the rcu context, on commit_zap_page path, we only remove the list head, and the shadow page is still listed. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html