current git master external module crashes my server

current git master external module crashes my server

[Sebastian Faerber]

Hello,

i just tried the current git master branch (last commit is
0fe149eb04e5e67f4d3ebc2ab9f2426356a308ba) as an external module with 2.6.23-rc3.
My Host ist 32bit, running 2.6.23-rc3 equippped with
"Intel(R) Core(TM)2 CPU          6600  @ 2.40GHz"

I start my Fedora Core 6 Image with
--
/usr/local/kvm/bin/qemu-system-x86_64 -net user -net nic,model=rtl8139 -vnc :1
-usbdevice tablet -monitor stdio -k de -hda fedora.img -cdrom
/isos/FC-6-i386-disc1.iso -boot c -m 512 -redir tcp:5555::22
--

This image was installed using kvm long time ago (kvm-20 or something).
It now crashes my host after approximatly 30 seconds:
--
BUG: unable to handle kernel NULL pointer dereference at virtual address 0000015c
 printing eip:
*pde = 00000000
Oops: 0002 [#1]
SMP
Modules linked in: kvm_intel kvm
CPU:    0
EIP:    0060:[<c03c24ef>]    Not tainted VLI
EFLAGS: 00010007   (2.6.23-rc3 #1)
EIP is at __sched_text_start+0x1bf/0x3f1
eax: c059a080   ebx: 00000000   ecx: f78d8200   edx: 00000000
esi: 00000000   edi: f7787550   ebp: f2bcef30   esp: f2bcef04
ds: 007b   es: 007b   fs: 00d8  gs: 0033  ss: 0068
Process qemu-system-x86 (pid: 8860, ti=f2bce000 task=f75d7550 task.ti=f2bce000)
Stack: c0000080 00000000 00000286 f88726d0 00000000 c2011000 c059e000 c2135000
       f2bcef58 efddebd0 f2bcef4c efddebd0 f886762c 00000000 c2135000 c0125a4a
       00000000 00000000 f88725f0 000000a1 efddebd0 00000000 c2135000 c0125a4a
Call Trace:
 [<f88726d0>] preempt_notifier_unregister+0x3b/0x57 [kvm]
 [<f886762c>] kvm_vcpu_block+0x52/0xab [kvm]
 [<c0125a4a>] default_wake_function+0x0/0xc
 [<f88725f0>] in_special_section+0x62/0x99 [kvm]
 [<c0125a4a>] default_wake_function+0x0/0xc
 [<f88676aa>] kvm_emulate_halt+0x25/0x46 [kvm]
 [<f894e307>] kvm_handle_exit+0x7c/0x99 [kvm_intel]
 [<f886860d>] __vcpu_run+0x180/0x1e2 [kvm]
 [<f8867ffd>] complete_pio+0xc8/0xcf [kvm]
 [<f886876d>] kvm_vcpu_ioctl_run+0xfe/0x129 [kvm]
 [<f88693d6>] kvm_vcpu_ioctl+0x0/0x404 [kvm]
 [<f88694ee>] kvm_vcpu_ioctl+0x118/0x404 [kvm]
 [<c032aa67>] raid1_end_write_request+0x0/0x202
 [<c0187afc>] bio_fs_destructor+0x0/0xb
 [<c01874ce>] end_bio_bh_io_sync+0x0/0x39
 [<c0187afc>] bio_fs_destructor+0x0/0xb
 [<c032aa67>] raid1_end_write_request+0x0/0x202
 [<c0187afc>] bio_fs_destructor+0x0/0xb
 [<c032aa67>] raid1_end_write_request+0x0/0x202
 [<c0187afc>] bio_fs_destructor+0x0/0xb
 [<c01874ce>] end_bio_bh_io_sync+0x0/0x39
 [<c0187afc>] bio_fs_destructor+0x0/0xb
 [<c032aa67>] raid1_end_write_request+0x0/0x202
 [<c0187afc>] bio_fs_destructor+0x0/0xb
 [<c032aa67>] raid1_end_write_request+0x0/0x202
 [<c0187afc>] bio_fs_destructor+0x0/0xb
 [<c01874ce>] end_bio_bh_io_sync+0x0/0x39
 [<c0187afc>] bio_fs_destructor+0x0/0xb
 [<c032aa67>] raid1_end_write_request+0x0/0x202
 [<c0187afc>] bio_fs_destructor+0x0/0xb
 [<c032aa67>] raid1_end_write_request+0x0/0x202
 [<c0187afc>] bio_fs_destructor+0x0/0xb
 [<c01874ce>] end_bio_bh_io_sync+0x0/0x39
 [<c0187afc>] bio_fs_destructor+0x0/0xb
 [<c032aa67>] raid1_end_write_request+0x0/0x202
 [<c0187afc>] bio_fs_destructor+0x0/0xb
 [<c032aa67>] raid1_end_write_request+0x0/0x202
 [<c0187afc>] bio_fs_destructor+0x0/0xb
 [<c01874ce>] end_bio_bh_io_sync+0x0/0x39
 [<c0187afc>] bio_fs_destructor+0x0/0xb
 [<c02004ec>] __next_cpu+0x12/0x1f
 [<c0124b00>] find_busiest_group+0x1bc/0x50e
 [<c0150d22>] mempool_free+0x69/0x6e
 [<c0150d22>] mempool_free+0x69/0x6e
 [<c032a9e1>] raid1_end_read_request+0x97/0x11d
 [<c0150d22>] mempool_free+0x69/0x6e
 [<c0150d22>] mempool_free+0x69/0x6e
 [<c032a9e1>] raid1_end_read_request+0x97/0x11d
 [<c02004ec>] __next_cpu+0x12/0x1f
 [<c023dc9e>] __add_entropy_words+0x62/0x193
 [<c01fb661>] as_put_io_context+0x2a/0x48
 [<c02bd84c>] scsi_run_queue+0xca/0xd5
 [<c01f5164>] elv_queue_empty+0x1d/0x1e
 [<c01f6feb>] blk_run_queue+0x1f/0x63
 [<c02bd8bb>] scsi_next_command+0x25/0x2f
 [<c02bd986>] scsi_end_request+0x9f/0xa7
 [<c02bdb65>] scsi_io_completion+0x112/0x360
 [<c0121dd2>] update_curr+0x13b/0x165
 [<c0122184>] enqueue_entity+0xab/0xbd
 [<c036a57d>] tcp_in_window+0xbc/0x3ee
 [<c036a57d>] tcp_in_window+0xbc/0x3ee
 [<c0140e5c>] clockevents_program_event+0xcf/0xd7
 [<f88699a2>] kvm_vm_ioctl+0x1c8/0x25f [kvm]
 [<c036afaa>] tcp_packet+0x481/0x48e
 [<c023f2d8>] tty_ldisc_try+0x31/0x36
 [<c023f2e9>] tty_ldisc_ref_wait+0xc/0x97
 [<c0125adb>] __wake_up+0x32/0x43
 [<c023f3dd>] tty_ldisc_deref+0x53/0x62
 [<c02443a6>] normal_poll+0x0/0x126
 [<c0174a80>] do_select+0x2d2/0x2df
 [<c01746bf>] __pollwait+0x0/0x42
 [<c015214b>] get_page_from_freelist+0xaa/0xca
 [<c01521c5>] __alloc_pages+0x5a/0x2bb
 [<c0377143>] ip_queue_xmit+0x34d/0x395
 [<c037638f>] dst_output+0x0/0x7
 [<c0151b94>] prep_new_page+0xb9/0xf1
 [<c0151fd5>] buffered_rmqueue+0xff/0x117
 [<c015214b>] get_page_from_freelist+0xaa/0xca
 [<c01521c5>] __alloc_pages+0x5a/0x2bb
 [<c02053a3>] copy_to_user+0x30/0x38
 [<c0354130>] memcpy_toiovec+0x27/0x47
 [<c0354648>] skb_copy_datagram_iovec+0x53/0x1ee
 [<c037d9d7>] tcp_cleanup_rbuf+0xdb/0xfb
 [<c03c3795>] _spin_lock_bh+0x8/0x18
 [<c0350d79>] release_sock+0x10/0x52
 [<c037e235>] tcp_recvmsg+0x67a/0x6b9
 [<c03c4fce>] do_page_fault+0x289/0x5a4
 [<c0350f2c>] sock_common_recvmsg+0x3e/0x54
 [<c034d9b3>] sock_recvmsg+0xcf/0xe8
 [<c03c39e2>] error_code+0x72/0x78
 [<c013007b>] __do_proc_dointvec+0x184/0x2ce
 [<c014efe9>] file_read_actor+0x82/0xe7
 [<c0122184>] enqueue_entity+0xab/0xbd
 [<c0122320>] enqueue_task_fair+0x2d/0x30
 [<c012387e>] inc_nr_running+0x13/0x21
 [<c012411a>] try_to_wake_up+0x293/0x29e
 [<c0132d1d>] signal_wake_up+0x1e/0x2c
 [<c0133526>] __group_send_sig_info+0x77/0x80
 [<c0133628>] group_send_sig_info+0x54/0x5c
 [<c01336db>] kill_pid_info+0x35/0x45
 [<c0133891>] kill_something_info+0xd0/0xd6
 [<c0134a21>] sys_kill+0x47/0x4c
 [<f88693d6>] kvm_vcpu_ioctl+0x0/0x404 [kvm]
 [<c0173e95>] do_ioctl+0x25/0x64
 [<c017413a>] vfs_ioctl+0x187/0x195
 [<c02053a3>] copy_to_user+0x30/0x38
 [<c017417a>] sys_ioctl+0x32/0x4c
 [<c0104dca>] syscall_call+0x7/0xb
 =======================
Code: 01 0f 85 7b 01 00 00 c7 42 04 02 00 00 00 e9 6f 01 00 00 64 8b 1d 04 80 59
c0 39 4d e4 b8 80 a0 59 c0 0f 84 a2 00 00 00 8b 55 e4 <f0> 0f b3 9a 5c 01 00 00
89 c2 03 14 9d 80 63 55 c0 c7 42 04 01
EIP: [<c03c24ef>] __sched_text_start+0x1bf/0x3f1 SS:ESP 0068:f2bcef04
--

If you need more information just tell me :-)

Regards,

Sebastian


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Re: current git master external module crashes my server

[Avi Kivity]

Sebastian Faerber wrote:
> Hello,
>
> i just tried the current git master branch (last commit is
> 0fe149eb04e5e67f4d3ebc2ab9f2426356a308ba) as an external module with 2.6.23-rc3.
> My Host ist 32bit, running 2.6.23-rc3 equippped with
> "Intel(R) Core(TM)2 CPU          6600  @ 2.40GHz"
>
> I start my Fedora Core 6 Image with
> --
> /usr/local/kvm/bin/qemu-system-x86_64 -net user -net nic,model=rtl8139 -vnc :1
> -usbdevice tablet -monitor stdio -k de -hda fedora.img -cdrom
> /isos/FC-6-i386-disc1.iso -boot c -m 512 -redir tcp:5555::22
> --
>
> This image was installed using kvm long time ago (kvm-20 or something).
> It now crashes my host after approximatly 30 seconds:
> --
> BUG: unable to handle kernel NULL pointer dereference at virtual address 0000015c
>  printing eip:
> *pde = 00000000
> Oops: 0002 [#1]
> SMP
> Modules linked in: kvm_intel kvm
> CPU:    0
> EIP:    0060:[<c03c24ef>]    Not tainted VLI
> EFLAGS: 00010007   (2.6.23-rc3 #1)
> EIP is at __sched_text_start+0x1bf/0x3f1
> eax: c059a080   ebx: 00000000   ecx: f78d8200   edx: 00000000
> esi: 00000000   edi: f7787550   ebp: f2bcef30   esp: f2bcef04
> ds: 007b   es: 007b   fs: 00d8  gs: 0033  ss: 0068
> Process qemu-system-x86 (pid: 8860, ti=f2bce000 task=f75d7550 task.ti=f2bce000)
> Stack: c0000080 00000000 00000286 f88726d0 00000000 c2011000 c059e000 c2135000
>        f2bcef58 efddebd0 f2bcef4c efddebd0 f886762c 00000000 c2135000 c0125a4a
>        00000000 00000000 f88725f0 000000a1 efddebd0 00000000 c2135000 c0125a4a
> Call Trace:
>  [<f88726d0>] preempt_notifier_unregister+0x3b/0x57 [kvm]
>   

What was the last kvm version (or date of using kvm.git) that worked for 
you?

Are you using other interesting applications?  kvm external modules have 
a conflict with debuggers.

-- 
error compiling committee.c: too many arguments to function


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Re: current git master external module crashes my server

[Sebastian Färber]

[-- Attachment #1: Type: text/plain, Size: 797 bytes --]

Hi Avi,

2007/9/12, Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>:
> What was the last kvm version (or date of using kvm.git) that worked for
> you?

kvm-36 is working for me, kvm-37 doesn't compile because of undefined
symbol "genapic" and kvm-38 gives me:
--
QEMU 0.9.0 monitor - type 'help' for more information
(qemu) kvm_run: failed entry, reason 33840
kvm_run returned -8
--
I attached the complete dmesg output for kvm-38.
My Fedora Core-6 Installation is using a graphical bootsplash so i
think this has something todo with realmode emulation?

> Are you using other interesting applications?  kvm external modules have
> a conflict with debuggers.

I don't use debuggers or anything special on this server. Never had
this kind of problems with kvm before.

Regards,

Sebastian

[-- Attachment #2: dmesg-kvm-38.txt --]
[-- Type: text/plain, Size: 10591 bytes --]

WARNING: at arch/i386/kernel/smp.c:560 native_smp_call_function_mask()
 [<c011aee0>] native_smp_call_function_mask+0x45/0xfc
 [<f894c0ee>] __vcpu_clear+0x0/0x42 [kvm_intel]
 [<f894c0ee>] __vcpu_clear+0x0/0x42 [kvm_intel]
 [<c011c02a>] smp_call_function_single+0x38/0x3e
 [<f894c165>] vcpu_clear+0x35/0x4d [kvm_intel]
 [<f894c5da>] vmx_vcpu_load+0x2c/0xf3 [kvm_intel]
 [<c0121f8a>] update_stats_wait_end+0x8e/0xab
 [<f8869edd>] kvm_sched_in+0xc/0xd [kvm]
 [<f88723bc>] in_special_section+0x7e/0x99 [kvm]
 [<f894c20b>] vmcs_writel+0xc/0x2c [kvm_intel]
 [<f894e3b1>] vmx_intr_assist+0x13/0xe7 [kvm_intel]
 [<f8868568>] __vcpu_run+0xdb/0x1e2 [kvm]
 [<f8867ffd>] complete_pio+0xc8/0xcf [kvm]
 [<f886876d>] kvm_vcpu_ioctl_run+0xfe/0x129 [kvm]
 [<f88693d6>] kvm_vcpu_ioctl+0x0/0x404 [kvm]
 [<f88694ee>] kvm_vcpu_ioctl+0x118/0x404 [kvm]
 [<c039c1d6>] fn_hash_lookup+0x87/0xa7
 [<c03717ea>] ip_route_input_slow+0x14c/0x70c
 [<c0150d22>] mempool_free+0x69/0x6e
 [<c01334e0>] __group_send_sig_info+0x31/0x80
 [<c0133628>] group_send_sig_info+0x54/0x5c
 [<c0173c30>] send_sigio_to_task+0xa2/0xaa
 [<c01334e0>] __group_send_sig_info+0x31/0x80
 [<c0133628>] group_send_sig_info+0x54/0x5c
 [<c0173c30>] send_sigio_to_task+0xa2/0xaa
 [<c0121dd2>] update_curr+0x13b/0x165
 [<c0122184>] enqueue_entity+0xab/0xbd
 [<c013e24f>] getnstimeofday+0x33/0x10a
 [<c0140e5c>] clockevents_program_event+0xcf/0xd7
 [<c0173c89>] send_sigio+0x51/0x66
 [<c0132880>] __sigqueue_alloc+0x31/0x57
 [<c0133052>] send_signal+0x57/0x105
 [<c0133526>] __group_send_sig_info+0x77/0x80
 [<c0133628>] group_send_sig_info+0x54/0x5c
 [<c02004ec>] __next_cpu+0x12/0x1f
 [<c0124b00>] find_busiest_group+0x1bc/0x50e
 [<c0121dd2>] update_curr+0x13b/0x165
 [<c0121dd2>] update_curr+0x13b/0x165
 [<c0122184>] enqueue_entity+0xab/0xbd
 [<c013e24f>] getnstimeofday+0x33/0x10a
 [<c02053a3>] copy_to_user+0x30/0x38
 [<f8866bd1>] kvm_vm_ioctl_get_dirty_log+0xd9/0xe5 [kvm]
 [<f88699a2>] kvm_vm_ioctl+0x1c8/0x25f [kvm]
 [<c0131eec>] run_timer_softirq+0x30/0x164
 [<c013d535>] hrtimer_interrupt+0x199/0x1c1
 [<c01423b2>] tick_sched_timer+0x0/0xb8
 [<c023f2d8>] tty_ldisc_try+0x31/0x36
 [<c023f2e9>] tty_ldisc_ref_wait+0xc/0x97
 [<c0125adb>] __wake_up+0x32/0x43
 [<c023f3dd>] tty_ldisc_deref+0x53/0x62
 [<c02443a6>] normal_poll+0x0/0x126
 [<c024130c>] tty_poll+0x52/0x5e
 [<c0174a80>] do_select+0x2d2/0x2df
 [<c01746bf>] __pollwait+0x0/0x42
 [<c01f8243>] __make_request+0x2ad/0x2e0
 [<c01f84ee>] generic_make_request+0x204/0x232
 [<c018b73d>] do_mpage_readpage+0x4ab/0x552
 [<c0151b94>] prep_new_page+0xb9/0xf1
 [<c0204c96>] memmove+0xe/0x24
 [<c0151fd5>] buffered_rmqueue+0xff/0x117
 [<c015214b>] get_page_from_freelist+0xaa/0xca
 [<c01521c5>] __alloc_pages+0x5a/0x2bb
 [<c036a57d>] tcp_in_window+0xbc/0x3ee
 [<c0352bb7>] skb_checksum+0x4c/0x275
 [<c0122184>] enqueue_entity+0xab/0xbd
 [<c0122320>] enqueue_task_fair+0x2d/0x30
 [<c012387e>] inc_nr_running+0x13/0x21
 [<c012411a>] try_to_wake_up+0x293/0x29e
 [<c013aa58>] autoremove_wake_function+0x13/0x33
 [<c0125a8f>] __wake_up_common+0x39/0x53
 [<c0131a59>] lock_timer_base+0x19/0x35
 [<c0131aff>] __mod_timer+0x8a/0x92
 [<c0350bad>] sk_reset_timer+0xc/0x16
 [<c038b83e>] tcp_v4_rcv+0x48b/0x754
 [<c03668b0>] nf_hook_slow+0x57/0xc9
 [<c0373858>] ip_local_deliver+0x172/0x21b
 [<c0373901>] ip_local_deliver_finish+0x0/0x197
 [<c0373f1d>] ip_rcv+0x485/0x4bd
 [<c0373f55>] ip_rcv_finish+0x0/0x287
 [<c01046ee>] setup_frame+0xdb/0x1d4
 [<c0357560>] netif_receive_skb+0x1aa/0x1c3
 [<c029db1b>] rtl8139_isr_ack+0x32/0x3e
 [<c029dd8b>] rtl8139_rx+0x264/0x2b3
 [<f88693d6>] kvm_vcpu_ioctl+0x0/0x404 [kvm]
 [<c0173e95>] do_ioctl+0x25/0x64
 [<c017413a>] vfs_ioctl+0x187/0x195
 [<c017417a>] sys_ioctl+0x32/0x4c
 [<c0104dca>] syscall_call+0x7/0xb
 =======================
vmwrite error: reg 401c value 0 (err -1040153552)
 [<f894e3b1>] vmx_intr_assist+0x13/0xe7 [kvm_intel]
 [<f8868568>] __vcpu_run+0xdb/0x1e2 [kvm]
 [<f8867ffd>] complete_pio+0xc8/0xcf [kvm]
 [<f886876d>] kvm_vcpu_ioctl_run+0xfe/0x129 [kvm]
 [<f88693d6>] kvm_vcpu_ioctl+0x0/0x404 [kvm]
 [<f88694ee>] kvm_vcpu_ioctl+0x118/0x404 [kvm]
 [<c039c1d6>] fn_hash_lookup+0x87/0xa7
 [<c03717ea>] ip_route_input_slow+0x14c/0x70c
 [<c0150d22>] mempool_free+0x69/0x6e
 [<c01334e0>] __group_send_sig_info+0x31/0x80
 [<c0133628>] group_send_sig_info+0x54/0x5c
 [<c0173c30>] send_sigio_to_task+0xa2/0xaa
 [<c01334e0>] __group_send_sig_info+0x31/0x80
 [<c0133628>] group_send_sig_info+0x54/0x5c
 [<c0173c30>] send_sigio_to_task+0xa2/0xaa
 [<c0121dd2>] update_curr+0x13b/0x165
 [<c0122184>] enqueue_entity+0xab/0xbd
 [<c013e24f>] getnstimeofday+0x33/0x10a
 [<c0140e5c>] clockevents_program_event+0xcf/0xd7
 [<c0173c89>] send_sigio+0x51/0x66
 [<c0132880>] __sigqueue_alloc+0x31/0x57
 [<c0133052>] send_signal+0x57/0x105
 [<c0133526>] __group_send_sig_info+0x77/0x80
 [<c0133628>] group_send_sig_info+0x54/0x5c
 [<c02004ec>] __next_cpu+0x12/0x1f
 [<c0124b00>] find_busiest_group+0x1bc/0x50e
 [<c0121dd2>] update_curr+0x13b/0x165
 [<c0121dd2>] update_curr+0x13b/0x165
 [<c0122184>] enqueue_entity+0xab/0xbd
 [<c013e24f>] getnstimeofday+0x33/0x10a
 [<c02053a3>] copy_to_user+0x30/0x38
 [<f8866bd1>] kvm_vm_ioctl_get_dirty_log+0xd9/0xe5 [kvm]
 [<f88698c9>] kvm_vm_ioctl+0xef/0x25f [kvm]
 [<c0131eec>] run_timer_softirq+0x30/0x164
 [<c013d535>] hrtimer_interrupt+0x199/0x1c1
 [<c01423b2>] tick_sched_timer+0x0/0xb8
 [<c023f2d8>] tty_ldisc_try+0x31/0x36
 [<c023f2e9>] tty_ldisc_ref_wait+0xc/0x97
 [<c0125adb>] __wake_up+0x32/0x43
 [<c023f3dd>] tty_ldisc_deref+0x53/0x62
 [<c02443a6>] normal_poll+0x0/0x126
 [<c024130c>] tty_poll+0x52/0x5e
 [<c0174a80>] do_select+0x2d2/0x2df
 [<c01746bf>] __pollwait+0x0/0x42
 [<c01f8243>] __make_request+0x2ad/0x2e0
 [<c01f84ee>] generic_make_request+0x204/0x232
 [<c018b73d>] do_mpage_readpage+0x4ab/0x552
 [<c0151b94>] prep_new_page+0xb9/0xf1
 [<c0204c96>] memmove+0xe/0x24
 [<c0151fd5>] buffered_rmqueue+0xff/0x117
 [<c015214b>] get_page_from_freelist+0xaa/0xca
 [<c01521c5>] __alloc_pages+0x5a/0x2bb
 [<c036a57d>] tcp_in_window+0xbc/0x3ee
 [<c0352bb7>] skb_checksum+0x4c/0x275
 [<c0122184>] enqueue_entity+0xab/0xbd
 [<c0122320>] enqueue_task_fair+0x2d/0x30
 [<c012387e>] inc_nr_running+0x13/0x21
 [<c012411a>] try_to_wake_up+0x293/0x29e
 [<c013aa58>] autoremove_wake_function+0x13/0x33
 [<c0125a8f>] __wake_up_common+0x39/0x53
 [<c0131a59>] lock_timer_base+0x19/0x35
 [<c0174d5d>] core_sys_select+0x2d0/0x2f9
 [<c0205251>] __copy_to_user_ll+0x3e/0x45
 [<c0109175>] save_i387_fxsave+0x95/0xa4
 [<c01045d2>] setup_sigcontext+0xd5/0x116
 [<c01046ee>] setup_frame+0xdb/0x1d4
 [<c013280a>] recalc_sigpending+0xb/0x1d
 [<c0132b77>] __dequeue_signal+0xd/0x6f
 [<c013280a>] recalc_sigpending+0xb/0x1d
 [<c0132c8c>] dequeue_signal+0xb3/0x126
 [<c0104beb>] do_signal+0x89/0x10c
 [<c01348ac>] sys_rt_sigtimedwait+0xde/0x20c
 [<c010901e>] convert_fxsr_from_user+0x1d/0xdf
 [<f88693d6>] kvm_vcpu_ioctl+0x0/0x404 [kvm]
 [<c0173e95>] do_ioctl+0x25/0x64
 [<c017413a>] vfs_ioctl+0x187/0x195
 [<c017417a>] sys_ioctl+0x32/0x4c
 [<c0104dca>] syscall_call+0x7/0xb
 =======================
Fault when IDT_Vectoring
vmwrite error: reg 6c00 value 80050033 (err -1040153552)
 [<f894e495>] vmx_vcpu_run+0x10/0xb5 [kvm_intel]
 [<f88685ba>] __vcpu_run+0x12d/0x1e2 [kvm]
 [<f8867ffd>] complete_pio+0xc8/0xcf [kvm]
 [<f886876d>] kvm_vcpu_ioctl_run+0xfe/0x129 [kvm]
 [<f88693d6>] kvm_vcpu_ioctl+0x0/0x404 [kvm]
 [<f88694ee>] kvm_vcpu_ioctl+0x118/0x404 [kvm]
 [<c039c1d6>] fn_hash_lookup+0x87/0xa7
 [<c03717ea>] ip_route_input_slow+0x14c/0x70c
 [<c0150d22>] mempool_free+0x69/0x6e
 [<c01334e0>] __group_send_sig_info+0x31/0x80
 [<c0133628>] group_send_sig_info+0x54/0x5c
 [<c0173c30>] send_sigio_to_task+0xa2/0xaa
 [<c01334e0>] __group_send_sig_info+0x31/0x80
 [<c0133628>] group_send_sig_info+0x54/0x5c
 [<c0173c30>] send_sigio_to_task+0xa2/0xaa
 [<c0121dd2>] update_curr+0x13b/0x165
 [<c0122184>] enqueue_entity+0xab/0xbd
 [<c013e24f>] getnstimeofday+0x33/0x10a
 [<c0140e5c>] clockevents_program_event+0xcf/0xd7
 [<c0173c89>] send_sigio+0x51/0x66
 [<c0132880>] __sigqueue_alloc+0x31/0x57
 [<c0133052>] send_signal+0x57/0x105
 [<c0133526>] __group_send_sig_info+0x77/0x80
 [<c0133628>] group_send_sig_info+0x54/0x5c
 [<c02004ec>] __next_cpu+0x12/0x1f
 [<c0124b00>] find_busiest_group+0x1bc/0x50e
 [<c0121dd2>] update_curr+0x13b/0x165
 [<c0121dd2>] update_curr+0x13b/0x165
 [<c0122184>] enqueue_entity+0xab/0xbd
 [<c013e24f>] getnstimeofday+0x33/0x10a
 [<c02053a3>] copy_to_user+0x30/0x38
 [<f8866bd1>] kvm_vm_ioctl_get_dirty_log+0xd9/0xe5 [kvm]
 [<f88698c9>] kvm_vm_ioctl+0xef/0x25f [kvm]
 [<c0131eec>] run_timer_softirq+0x30/0x164
 [<c013d535>] hrtimer_interrupt+0x199/0x1c1
 [<c01423b2>] tick_sched_timer+0x0/0xb8
 [<c023f2d8>] tty_ldisc_try+0x31/0x36
 [<c023f2e9>] tty_ldisc_ref_wait+0xc/0x97
 [<c0125adb>] __wake_up+0x32/0x43
 [<c023f3dd>] tty_ldisc_deref+0x53/0x62
 [<c02443a6>] normal_poll+0x0/0x126
 [<c024130c>] tty_poll+0x52/0x5e
 [<c0174a80>] do_select+0x2d2/0x2df
 [<c01746bf>] __pollwait+0x0/0x42
 [<c01f8243>] __make_request+0x2ad/0x2e0
 [<c01f84ee>] generic_make_request+0x204/0x232
 [<c018b73d>] do_mpage_readpage+0x4ab/0x552
 [<c0151b94>] prep_new_page+0xb9/0xf1
 [<c0204c96>] memmove+0xe/0x24
 [<c0151fd5>] buffered_rmqueue+0xff/0x117
 [<c015214b>] get_page_from_freelist+0xaa/0xca
 [<c01521c5>] __alloc_pages+0x5a/0x2bb
 [<c036a57d>] tcp_in_window+0xbc/0x3ee
 [<c0352bb7>] skb_checksum+0x4c/0x275
 [<c0122184>] enqueue_entity+0xab/0xbd
 [<c0122320>] enqueue_task_fair+0x2d/0x30
 [<c012387e>] inc_nr_running+0x13/0x21
 [<c012411a>] try_to_wake_up+0x293/0x29e
 [<c013aa58>] autoremove_wake_function+0x13/0x33
 [<c0125a8f>] __wake_up_common+0x39/0x53
 [<c0131a59>] lock_timer_base+0x19/0x35
 [<c0174d5d>] core_sys_select+0x2d0/0x2f9
 [<c0205251>] __copy_to_user_ll+0x3e/0x45
 [<c0109175>] save_i387_fxsave+0x95/0xa4
 [<c01045d2>] setup_sigcontext+0xd5/0x116
 [<c01046ee>] setup_frame+0xdb/0x1d4
 [<c013280a>] recalc_sigpending+0xb/0x1d
 [<c0132b77>] __dequeue_signal+0xd/0x6f
 [<c013280a>] recalc_sigpending+0xb/0x1d
 [<c0132c8c>] dequeue_signal+0xb3/0x126
 [<c0104beb>] do_signal+0x89/0x10c
 [<c01348ac>] sys_rt_sigtimedwait+0xde/0x20c
 [<c010901e>] convert_fxsr_from_user+0x1d/0xdf
 [<f88693d6>] kvm_vcpu_ioctl+0x0/0x404 [kvm]
 [<c0173e95>] do_ioctl+0x25/0x64
 [<c017413a>] vfs_ioctl+0x187/0x195
 [<c017417a>] sys_ioctl+0x32/0x4c
 [<c0104dca>] syscall_call+0x7/0xb
 =======================

[-- Attachment #3: Type: text/plain, Size: 228 bytes --]

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Re: current git master external module crashes my server

[Avi Kivity]

Sebastian Färber wrote:
> Hi Avi,
>
> 2007/9/12, Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>:
>   
>> What was the last kvm version (or date of using kvm.git) that worked for
>> you?
>>     
>
> kvm-36 is working for me, kvm-37 doesn't compile because of undefined
> symbol "genapic" and kvm-38 gives me:
> --
> QEMU 0.9.0 monitor - type 'help' for more information
> (qemu) kvm_run: failed entry, reason 33840
> kvm_run returned -8
> --
> I attached the complete dmesg output for kvm-38.
> My Fedora Core-6 Installation is using a graphical bootsplash so i
> think this has something todo with realmode emulation?
>
>   


> vmwrite error: reg 401c value 0 (err -1040153552)


Ah, this is the TPR shadow.  I just committed a patch from Sheng Yang to 
fix this.  kvm-39 (to be released shortly) will include it.

>> Are you using other interesting applications?  kvm external modules have
>> a conflict with debuggers.
>>     
>
> I don't use debuggers or anything special on this server. Never had
> this kind of problems with kvm before.
>   

The lapic merge contained new and complex code, and it will take some 
time to shake the bugs out.  Once that's done kvm will return to its 
stable and sober self.

-- 
error compiling committee.c: too many arguments to function


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Re: current git master external module crashes my server

[Sebastian Färber]

Hi Avi,

2007/9/12, Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>:
>
> > vmwrite error: reg 401c value 0 (err -1040153552)
>
>
> Ah, this is the TPR shadow.  I just committed a patch from Sheng Yang to
> fix this.  kvm-39 (to be released shortly) will include it.

I manually applied Sheng Yang's ("Prevent setting CPU_BASED_TPR_SHADOW
on i386 host") patch and now i get the following error:

Fault when IDT_Vectoring
vmwrite error: reg 6c00 value 80050033 (err -1040153552)

If you need the full dmesg output just tell me.

Regards,

Sebastian

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Re: current git master external module crashes my server

[Avi Kivity]

Sebastian Färber wrote:
> Hi Avi,
>
> 2007/9/12, Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>:
>   
>>> vmwrite error: reg 401c value 0 (err -1040153552)
>>>       
>> Ah, this is the TPR shadow.  I just committed a patch from Sheng Yang to
>> fix this.  kvm-39 (to be released shortly) will include it.
>>     
>
> I manually applied Sheng Yang's ("Prevent setting CPU_BASED_TPR_SHADOW
> on i386 host") patch and now i get the following error:
>
> Fault when IDT_Vectoring
> vmwrite error: reg 6c00 value 80050033 (err -1040153552)
>
> If you need the full dmesg output just tell me.
>   

Sheng, is this related to the TPR shadow somehow?

-- 
error compiling committee.c: too many arguments to function


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Re: current git master external module crashes my server

[Sebastian Färber]

Hi,

i just upgraded to lastet git and now get the following error in dmesg:
--
emulation failed (mmio) rip c2008430 60 17 97 f8
--

qemu exits with:

(qemu) exception 14 (2)
rax 0000000000000000 rbx 0000000000036380 rcx 0000000000009600 rdx
00000000000024f1
rsi 00000000000a0000 rdi 00000000000003c4 rsp 0000000000067ec4 rbp
0000000000067ecc
r8  0000000000000000 r9  0000000000000000 r10 0000000000000000 r11
0000000000000000
r12 0000000000000000 r13 0000000000000000 r14 0000000000000000 r15
0000000000000000
rip 000000000000ef31 rflags 00010083
cs 0008 (00000000/ffffffff p 1 dpl 0 db 1 s 1 type b l 0 g 1 avl 0)
ds 0010 (00000000/ffffffff p 1 dpl 0 db 1 s 1 type 3 l 0 g 1 avl 0)
es 0010 (00000000/ffffffff p 1 dpl 0 db 1 s 1 type 3 l 0 g 1 avl 0)
ss 0010 (00000000/ffffffff p 1 dpl 0 db 1 s 1 type 3 l 0 g 1 avl 0)
fs 0010 (00000000/ffffffff p 1 dpl 0 db 1 s 1 type 3 l 0 g 1 avl 0)
gs 0010 (00000000/ffffffff p 1 dpl 0 db 1 s 1 type 3 l 0 g 1 avl 0)
tr 0000 (00000000/0000ffff p 1 dpl 0 db 0 s 0 type b l 0 g 0 avl 0)
ldt 0000 (00000000/0000ffff p 1 dpl 0 db 0 s 0 type 2 l 0 g 0 avl 0)
gdt 9040/27
idt 0/3ff
cr0 60000011 cr2 0 cr3 0 cr4 0 cr8 0 efer 0

Regards,

Sebastian

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Re: current git master external module crashes my server

[Avi Kivity]

Sebastian Färber wrote:
> Hi,
>
> i just upgraded to lastet git and now get the following error in dmesg:
> --
> emulation failed (mmio) rip c2008430 60 17 97 f8
> --
>   

Sorry, I can't really track down what 'latest git' means.

Can you re-fetch and try again, and if it fails post the HEAD commit
hash?  Also repost your guest OS details.


-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.


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