On 04/18/2013 08:08 AM, Marcelo Tosatti wrote: > On Tue, Apr 16, 2013 at 02:32:53PM +0800, Xiao Guangrong wrote: >> Use kvm_mmu_invalid_all_pages in kvm_arch_flush_shadow_all and >> rename kvm_zap_all to kvm_free_all which is used to free all >> memmory used by kvm mmu when vm is being destroyed, at this time, >> no vcpu exists and mmu-notify has been unregistered, so we can >> free the shadow pages out of mmu-lock > > Since there is no contention for mmu-lock its also not a problem to > grab the lock right?
This still has contention. Other mmu-notify can happen when we handle ->release(). On the other handle, spin-lock is not preemptable. > > Automated verification of locking/srcu might complain. We hold slot-lock to free shadow page out of mmu-lock, it can avoid the complain. No? -- 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/
