Avi Kivity wrote: > > Ah! The flood detector is not seeing the access through the > kmap_atomic() pte, because that access has gone through the emulator. > last_updated_pte_accessed(vcpu) will never return true. > > Can you verify that last_updated_pte_accessed(vcpu) indeed always > returns false? >
It returns both true and false. I added a tracer to kvm_mmu_pte_write() to dump the rc of last_updated_pte_accessed(vcpu). ie., pte_access = last_updated_pte_accessed(vcpu); KVMTRACE_1D(PTE_ACCESS, vcpu, (u32) pte_access, handler); A sample: (+ 4488) VMEXIT [ exitcode = 0x00000000, rip = 0x00000000 c016104a ] (+ 0) PAGE_FAULT [ errorcode = 0x0000000b, virt = 0x00000000 fffb63b0 ] (+ 2480) PAGE_FAULT1 [ write_count = 0 ] (+ 424) PAGE_FAULT2 [ level = 2 metaphysical = 0 access 0x00000007 ] (+ 51672) PAGE_FAULT3 (+ 472) PAGE_FAULT4 (+ 704) PAGE_FAULT5 [ shadow_ent = 0x80000001 2dfb5043 ] (+ 1496) VMENTRY (+ 4568) VMEXIT [ exitcode = 0x00000000, rip = 0x00000000 c01610e7 ] (+ 0) PAGE_FAULT [ errorcode = 0x00000003, virt = 0x00000000 c0009db4 ] (+ 2352) PAGE_FAULT1 [ write_count = 0 ] (+ 728) PAGE_FAULT5 [ shadow_ent = 0x00000001 91409041 ] (+ 0) PTE_WRITE [ gpa = 0x00000000 00009db4 gpte = 0x00000000 41fb5363 ] (+ 0) PTE_ACCESS [ pte_access = 1 ] (+ 6864) VMENTRY (+ 3896) VMEXIT [ exitcode = 0x00000000, rip = 0x00000000 c01610ee ] (+ 0) PAGE_FAULT [ errorcode = 0x00000003, virt = 0x00000000 c0009db0 ] (+ 2376) PAGE_FAULT1 [ write_count = 1 ] (+ 720) PAGE_FAULT5 [ shadow_ent = 0x00000001 91409041 ] (+ 0) PTE_WRITE [ gpa = 0x00000000 00009db0 gpte = 0x00000000 00000000 ] (+ 0) PTE_ACCESS [ pte_access = 0 ] (+ 12344) VMENTRY (+ 4688) VMEXIT [ exitcode = 0x00000000, rip = 0x00000000 c016127c ] (+ 0) PAGE_FAULT [ errorcode = 0x00000003, virt = 0x00000000 c0009db4 ] (+ 2416) PAGE_FAULT1 [ write_count = 2 ] (+ 792) PAGE_FAULT5 [ shadow_ent = 0x00000001 91409043 ] (+ 1128) VMENTRY (+ 4512) VMEXIT [ exitcode = 0x00000000, rip = 0x00000000 c016104a ] (+ 0) PAGE_FAULT [ errorcode = 0x0000000b, virt = 0x00000000 fffb63b0 ] (+ 2448) PAGE_FAULT1 [ write_count = 0 ] (+ 448) PAGE_FAULT2 [ level = 2 metaphysical = 0 access 0x00000007 ] (+ 51520) PAGE_FAULT3 (+ 432) PAGE_FAULT4 (+ 696) PAGE_FAULT5 [ shadow_ent = 0x80000001 2df5a043 ] (+ 1480) VMENTRY david ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel