https://bugzilla.kernel.org/show_bug.cgi?id=56971 Summary: [nested virt] L1 CPU Stuck when booting a L2 guest Product: Virtualization Version: unspecified Kernel Version: 3.9.0-rc3 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: kvm AssignedTo: virtualization_kvm@xxxxxxxxxxxxxxxxxxxx ReportedBy: yongjie.ren@xxxxxxxxx Regression: No Created an attachment (id=99651) --> (https://bugzilla.kernel.org/attachment.cgi?id=99651) call trace in L1 guest Environment: ------------ Host OS (ia32/ia32e/IA64):ia32e Guest OS (ia32/ia32e/IA64):ia32e Guest OS Type (Linux/Windows):Linux kvm.git next Commit:c0d1c770c05ac7051df86914f9627b68f29c1d67 qemu-kvm.git Commit:8912bdea01e8671e59fe0287314379be9c1f40ec Host Kernel Version:3.9.0-rc3 Hardware: Sandy Bridge - EP Bug detailed description: -------------------------- create L1 guest with "-cpu host", then create a L2 guest. We found CPU Stuck in L1 guest when booting L2 guest. This should be a regression. kvm(next)+ qemu-kvm = result 188424ba + 8912bdea = good c0d1c770 + 8912bdea = bad Reproduce steps: ---------------- 1. create L1 guests: qemu-system-x86_64 --enable-kvm -m 10240 -smp 8 -net nic,macaddr=00:12:45:67:2B:1C -net tap,script=/etc/kvm/qemu-ifup nested-kvm-rhel6u4.qcow -cpu host 2. create L2 guest qemu-system-x86_64 --enable-kvm -m 1024 -smp 2 -net none rhel6u4.img Current result: ---------------- L1 call trace (CPU Stuck) Expected result: ---------------- L1 and L2 work fine Basic root-causing log: ---------------------- [ 312.158002] BUG: soft lockup - CPU#7 stuck for 22s! [qemu-system-x86:2353] [ 312.158002] Modules linked in: bridge nfsv3 nfs_acl nfsv4 auth_rpcgss nfs fuse fscache dns_resolver lockd sunrpc 8021q garp stp llc binfmt_misc uinput ppdev parport_pc parport kvm_intel kvm crc32c_intel ghash_clmulni_intel microcode pcspkr e1000 cirrus ttm drm_kms_helper drm i2c_piix4 i2c_core floppy(F) [ 312.158002] CPU 7 [ 312.158002] Pid: 2353, comm: qemu-system-x86 Tainted: GF 3.8.5 #1 Bochs Bochs [ 312.158002] RIP: 0010:[<ffffffff810c0982>] [<ffffffff810c0982>] smp_call_function_many+0x202/0x270 [ 312.158002] RSP: 0018:ffff88027a21dce8 EFLAGS: 00000202 [ 312.158002] RAX: 0000000000000008 RBX: 000800008ede8700 RCX: 0000000000000004 [ 312.158002] RDX: 0000000000000004 RSI: 0000000000000080 RDI: 0000000000000292 [ 312.158002] RBP: ffff88027a21dd38 R08: ffff88029fdd4890 R09: 0000000000000080 [ 312.158002] R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000292 [ 312.158002] R13: 0000000000000001 R14: ffffea0009e34640 R15: 0040000000080008 [ 312.158002] FS: 00007ff26ef41700(0000) GS:ffff88029fdc0000(0000) knlGS:0000000000000000 [ 312.158002] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 312.158002] CR2: 00007ff271248000 CR3: 00000002902a7000 CR4: 00000000000427e0 [ 312.158002] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 312.158002] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 312.158002] Process qemu-system-x86 (pid: 2353, threadinfo ffff88027a21c000, task ffff88027d368000) [ 312.158002] Stack: [ 312.158002] ffff88027d368000 01ff88027d368000 ffff88027a21dd48 ffffffff8104f110 [ 312.158002] 00007ff23fffffff ffff88028ede89c0 ffff88028ede8700 00007ff267dff000 [ 312.158002] ffff88027a21de18 00007ff268000000 ffff88027a21dd68 ffffffff8104ed5e [ 312.158002] Call Trace: [ 312.158002] [<ffffffff8104f110>] ? flush_tlb_mm_range+0x250/0x250 [ 312.158002] [<ffffffff8104ed5e>] native_flush_tlb_others+0x2e/0x30 [ 312.158002] [<ffffffff8104ef30>] flush_tlb_mm_range+0x70/0x250 [ 312.158002] [<ffffffff8115d822>] tlb_flush_mmu+0xa2/0xb0 [ 312.158002] [<ffffffff8115e15c>] tlb_finish_mmu+0x1c/0x50 [ 312.158002] [<ffffffff8116552a>] unmap_region+0xea/0x110 [ 312.158002] [<ffffffff811672c2>] ? __split_vma+0x1e2/0x230 [ 312.158002] [<ffffffff81167c14>] do_munmap+0x274/0x3a0 [ 312.158002] [<ffffffff81167d91>] vm_munmap+0x51/0x80 [ 312.158002] [<ffffffff81167dec>] sys_munmap+0x2c/0x40 [ 312.158002] [<ffffffff81653999>] system_call_fastpath+0x16/0x1b [ 312.158002] Code: a6 58 00 0f ae f0 4c 89 e7 ff 15 e2 08 b6 00 80 7d bf 00 0f 84 89 fe ff ff f6 43 20 01 0f 84 7f fe ff ff 66 0f 1f 44 00 00 f3 90 <f6> 43 20 01 75 f8 e9 6c fe ff ff 0f 1f 00 4c 89 ea 4c 89 f6 44 -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
