Hi,
I just tried kvm-27 with the following result when starting a vm.
-no-kvm works, as does kvm-26. No other changes to my set up:
BUG: unable to handle kernel NULL pointer dereference at virtual address
00000024
printing eip:
f8d16ee7
*pde = 00000000
Oops: 0002 [#1]
PREEMPT SMP
Modules linked in: kvm_intel kvm i915 drm acpi_cpufreq freq_table rfcomm l2cap
bluetooth button ac battery iptable_raw xt_comment xt_policy xt_multiport
ipt_TTL ipt_ttl ipt_TOS ipt_tos ipt_REJECT ipt_recent ipt_owner ipt_LOG
ipt_iprange ipt_ECN ipt_ecn ipt_ah ipt_addrtype xt_tcpmss xt_pkttype xt_NFQUEUE
xt_NFLOG xt_MARK xt_mark xt_mac xt_limit xt_length xt_helper xt_hashlimit
xt_dccp xt_conntrack xt_CONNMARK xt_connmark xt_CLASSIFY xt_tcpudp xt_state
nf_conntrack_ipv4 nf_conntrack iptable_mangle nfnetlink iptable_filter
ip_tables x_tables tun bridge llc dock thinkpad_acpi hwmon backlight loop
mmc_block snd_hda_intel snd_pcm_oss snd_mixer_oss snd_pcm snd_timer sdhci snd
mmc_core psmouse yenta_socket rsrc_nonstatic i2c_i801 pcmcia_core i2c_core
intel_agp agpgart soundcore snd_page_alloc evdev sha256 usbhid hid ehci_hcd
usbcore e1000 sd_mod thermal processor fan
CPU: 0
EIP: 0060:[<f8d16ee7>] Not tainted VLI
EFLAGS: 00010206 (2.6.22-rc3-20070531-1 #1)
EIP is at mmu_free_roots+0x47/0x90 [kvm]
eax: 00000000 ebx: 00000000 ecx: 32560001 edx: 0064ac00
esi: 00000008 edi: f229109c ebp: f2290000 esp: f2527e98
ds: 007b es: 007b fs: 00d8 gs: 0033 ss: 0068
Process qemu (pid: 6147, ti=f2526000 task=f2874000 task.ti=f2526000)
Stack: f229109c fffffff5 00000000 f8d16fb1 f229109c f8d18128 f229109c f8d14d78
00000000 00000000 f2527ed8 c034ea98 00000020 00100000 00000010 00000020
00000002 f2290068 00000020 000fffe0 00000080 f2290040 00000002 c17f18e0
Call Trace:
[<f8d16fb1>] destroy_kvm_mmu+0x21/0x40 [kvm]
[<f8d18128>] kvm_mmu_reset_context+0x8/0x30 [kvm]
[<f8d14d78>] kvm_vm_ioctl+0x758/0x830 [kvm]
[<c01359e6>] __atomic_notifier_call_chain+0x26/0x50
[<f8d14620>] kvm_vm_ioctl+0x0/0x830 [kvm]
[<c018233b>] do_ioctl+0x2b/0x90
[<c011cf33>] do_page_fault+0x333/0x620
[<c01823fc>] vfs_ioctl+0x5c/0x290
[<c018266d>] sys_ioctl+0x3d/0x70
[<c0104182>] sysenter_past_esp+0x5f/0x85
[<c02d0000>] packet_setsockopt+0x2b0/0x3b0
=======================
Code: 30 89 da 09 ca 74 2d 89 c8 89 da 81 e2 ff ff 0f 00 25 00 f0 ff ff 0f ac
d0 0c c1 ea 0c 89 c2 a1 00 b9 3c c0 c1 e2 05 8b 44 02 0c <ff> 48 24 8b 87 10 01
00 00 b9 ff ff ff ff c7 04 30 ff ff ff ff
EIP: [<f8d16ee7>] mmu_free_roots+0x47/0x90 [kvm] SS:ESP 0068:f2527e98
note: qemu[6147] exited with preempt_count 1
BUG: scheduling while atomic: qemu/0x00000001/6147
[<c02d1990>] __sched_text_start+0x4f0/0x950
[<c015a36d>] __pagevec_free+0x1d/0x30
[<c015cd27>] release_pages+0x137/0x160
[<c02d2ad2>] __mutex_lock_slowpath+0x52/0x90
[<c02d292a>] mutex_lock+0xa/0x10
[<f8d13e0b>] vcpu_load+0xb/0x20 [kvm]
[<f8d14481>] kvm_free_vcpu+0x11/0x60 [kvm]
[<f8d14e9a>] kvm_destroy_vm+0x4a/0x80 [kvm]
[<f8d15138>] kvm_vm_release+0x8/0x10 [kvm]
[<c01779c7>] __fput+0x97/0x160
[<f8d13df0>] kvm_vcpu_release+0x10/0x20 [kvm]
[<c01779c7>] __fput+0x97/0x160
[<c0174e09>] filp_close+0x49/0x80
[<c012ab5c>] put_files_struct+0x9c/0xc0
[<c012bde9>] do_exit+0x129/0x7b0
[<c0105840>] die+0x250/0x260
[<c011cee6>] do_page_fault+0x2e6/0x620
[<c011cc00>] do_page_fault+0x0/0x620
[<c02d3c72>] error_code+0x72/0x78
[<f8d16ee7>] mmu_free_roots+0x47/0x90 [kvm]
[<f8d16fb1>] destroy_kvm_mmu+0x21/0x40 [kvm]
[<f8d18128>] kvm_mmu_reset_context+0x8/0x30 [kvm]
[<f8d14d78>] kvm_vm_ioctl+0x758/0x830 [kvm]
[<c01359e6>] __atomic_notifier_call_chain+0x26/0x50
[<f8d14620>] kvm_vm_ioctl+0x0/0x830 [kvm]
[<c018233b>] do_ioctl+0x2b/0x90
[<c011cf33>] do_page_fault+0x333/0x620
[<c01823fc>] vfs_ioctl+0x5c/0x290
[<c018266d>] sys_ioctl+0x3d/0x70
[<c0104182>] sysenter_past_esp+0x5f/0x85
[<c02d0000>] packet_setsockopt+0x2b0/0x3b0
=======================
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