Hi, while trying to run a current openSUSE in VMWare ESX in KVM (using NPT), some KVM code seems to be stuck in an endless loop. The qemu process hangs, I can't attach gdb to it and the kernel module seems to be hanging in a place where I don't see any looping code. One CPU is definitely stuck in sys at 100% though.
This is running git as of yesterday with some minor ESX modifications that should not touch any of these parts (userspace and MSRs). Maybe one of you guys has a clue what's going on here. You'll find a snippet of a t-sysrq trace with all qemu relevant parts below. The registers (incl. IP) of these don't change over time. Alex qemu-system-x D ffff810001025280 0 27900 9501 ffff8101000e5c58 0000000000000082 0000000000000000 ffff8101000e5c1c ffff81011446e728 ffffffff807e6280 ffffffff807e6280 ffff8100388ca680 ffffffff80601890 ffff8100388ca9c0 0000000000200200 ffff8100388ca9c0 Call Trace: [<ffffffff804485ec>] __mutex_lock_slowpath+0x72/0xa9 [<ffffffff8044847a>] mutex_lock+0x1e/0x22 [<ffffffff88d7f630>] :kvm:kvm_arch_vm_ioctl+0x30e/0x5ae [<ffffffff88d7c78e>] :kvm:kvm_vm_ioctl+0x744/0x777 [<ffffffff802acada>] vfs_ioctl+0x2a/0x78 [<ffffffff802acd6f>] do_vfs_ioctl+0x247/0x261 [<ffffffff802acdde>] sys_ioctl+0x55/0x77 [<ffffffff8020bffa>] system_call_after_swapgs+0x8a/0x8f [<00007f2f3b15eb67>] qemu-system-x R running task 0 27908 9501 0000000000000000 ffffffff88d7d3ad 0000000000000390 ffff810100120040 ffff810116491000 00000000fee00390 0000000000000000 0000000000000000 ffff81011b361d08 ffffffff88d7f1fb 0000000000000000 0000000100000000 Call Trace: Inexact backtrace: [<ffffffff88d7d3ad>] :kvm:kvm_get_cs_db_l_bits+0x27/0x3e [<ffffffff88d7f1fb>] :kvm:emulate_instruction+0x199/0x266 [<ffffffff88d86700>] :kvm:kvm_mmu_page_fault+0x49/0x86 [<ffffffff88a3ebe8>] :kvm_amd:pf_interception+0xa8/0xb1 [<ffffffff88a3e1b4>] :kvm_amd:handle_exit+0x218/0x221 [<ffffffff88d810f6>] :kvm:kvm_arch_vcpu_ioctl_run+0x600/0x81a [<ffffffff88d7a4f0>] :kvm:kvm_vcpu_ioctl+0xf6/0x485 [<ffffffff802acada>] vfs_ioctl+0x2a/0x78 [<ffffffff802acd6f>] do_vfs_ioctl+0x247/0x261 [<ffffffff802a13a3>] fget_light+0x1/0x83 [<ffffffff802acdde>] sys_ioctl+0x55/0x77 [<ffffffff802a0b48>] sys_writev+0x60/0x94 [<ffffffff8020bffa>] system_call_after_swapgs+0x8a/0x8f
dmesg.kvm.gz
Description: GNU Zip compressed data
