Hi, we are seeing something strange when running the KVM unit-tests on recent KVM and "older" CPUs (K8 Family). ------------[ cut here ]------------ WARNING: at arch/x86/kvm/../../../virt/kvm/kvm_main.c:1325 kvm_release_pfn_clean+0x5b/0x60 [kvm]() Hardware name: WARTHOG Modules linked in: tun nfsv4 auth_rpcgss nfsv3 nfs_acl nfs fscache lockd sunrpc bridge stp llc ipv6 amd8111e mii powernow_k8 freq_table kvm_amd kvm serio_raw pcspkr k8temp amd64_edac_mod edac_core edac_mce_amd i2c_amd756 amd_rng i2c_amd8111 sg shpchp ext3 jbd mbcache sd_mod crc_t10dif sr_mod cdrom sata_sil ata_generic pata_acpi pata_amd radeon ttm drm_kms_helper drm i2c_algo_bit i2c_core dm_mirror dm_region_hash dm_log dm_mod Pid: 2084, comm: qemu-kvm Not tainted 3.6.0.20121010_ecefbd9-1.el6.osrc.x86_64 #1 Call Trace: [<ffffffff8105510f>] warn_slowpath_common+0x7f/0xc0 [<ffffffff8105516a>] warn_slowpath_null+0x1a/0x20 [<ffffffffa029439b>] kvm_release_pfn_clean+0x5b/0x60 [kvm] [<ffffffffa02b7cdb>] paging64_fetch+0x1eb/0x370 [kvm] [<ffffffffa0294a1f>] ? __gfn_to_pfn+0x6f/0x80 [kvm] [<ffffffffa0294b0a>] ? gfn_to_pfn_async+0x1a/0x20 [kvm] [<ffffffffa02b335b>] ? try_async_pf+0x4b/0x1f0 [kvm] [<ffffffffa02b80f3>] paging64_page_fault+0x293/0x2d0 [kvm] [<ffffffff8116a72c>] ? kfree+0x2c/0x120 [<ffffffffa02b37d7>] kvm_mmu_page_fault+0x27/0xd0 [kvm] [<ffffffffa03150b4>] pf_interception+0xa4/0x170 [kvm_amd] [<ffffffffa031be56>] handle_exit+0x146/0x2d0 [kvm_amd] [<ffffffffa02a458d>] ? kvm_get_cr8+0x1d/0x30 [kvm] [<ffffffffa03155a5>] ? svm_vcpu_run+0x425/0x530 [kvm_amd] [<ffffffffa02a8f0c>] vcpu_enter_guest+0x39c/0x6b0 [kvm] [<ffffffffa02a9408>] __vcpu_run+0x1e8/0x320 [kvm] [<ffffffffa02a95da>] kvm_arch_vcpu_ioctl_run+0x9a/0x1f0 [kvm] [<ffffffffa02960f8>] kvm_vcpu_ioctl+0x4a8/0x590 [kvm] [<ffffffff81189e0c>] do_vfs_ioctl+0x8c/0x340 [<ffffffff8118a161>] sys_ioctl+0xa1/0xb0 [<ffffffff810d4fc6>] ? __audit_syscall_exit+0x3d6/0x430 [<ffffffff81548669>] system_call_fastpath+0x16/0x1b ---[ end trace bc3b9055849b3814 ]--- The failing tests are svm and svm-disable, which seem to loop forever once started. Begin logfile: enabling apic enabling apic paging enabled cr0 = 80010011 cr3 = 7fff000 cr4 = 20 null: PASS vmrun: PASS vmrun intercept check: PASS cr3 read intercept: PASS enabling apic enabling apic paging enabled cr0 = 80010011 cr3 = 7fff000 cr4 = 20 null: PASS vmrun: PASS vmrun intercept check: PASS cr3 read intercept: PASS </snip> # goes on until the test is killed. Anyone seen this behavior? -- Kind regards. Conny Seidel ################################################################## # Email : conny.seidel@xxxxxxx GnuPG-Key : 0xA6AB055D # # Fingerprint: 17C4 5DB2 7C4C C1C7 1452 8148 F139 7C09 A6AB 055D # ################################################################## # Advanced Micro Devices GmbH Einsteinring 24 85609 Dornach # # General Managers: Alberto Bozzo # # Registration: Dornach, Landkr. Muenchen; Registerger. Muenchen # # HRB Nr. 43632 # ##################################################################
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