Hi,
Il Mon, Jun 04, 2007 at 12:35:37PM +0300, Avi Kivity ha scritto:
> Luca Tettamanti wrote:
> >Hello,
> >my kernel just exploded :)
> >
> >The host is running 2.6-git-current, with KVM modules from KVM-27
> >package. kernel is 32bit, SMP, with PREEMPT enabled, no HIGHMEM (but I'm
> >using CONFIG_VMSPLIT_3G_OPT=y). The CPU is a Core2 (hence I'm using
> >kvm-intel).
> >Guest was a Fedora7 setup DVD, which died somewhere during the
> >installation (anaconda was already active at that point). Bad news is
> >that I cannot reproduce the bug :|
> >
> Fortunately the trace clearly shows the problem (out of mmu working
> memory on guest context switch). The attached patch should fix it. Let
> me know if it works for you.
It turned out that it was somewhat reproducible with fedora installer.
With your patch it doesn't oops anymore.
While doing repeated tests with the installer I ran into another
(unrelated) problem. Sometimes the guest kernel hangs at boot at:
NET: Registered protocol family 2
with any kind of networking options (except for -net none, which works).
With -no-kvm it boots with any networking option.
The only difference in dmesg is that when KVM is enable the guest uses
the TSC:
NetLabel: unlabeled traffic allowed by default
-Time: tsc clocksource has been installed.
PCI: Ignore bogus resource 6 [0:0] of 0000:00:02.0
For reference this is the command line that I'm using:
./kvm-27/qemu/i386-softmmu/qemu -hda /home/kronos/tmp/fedora.img
-cdrom /home/kronos/tmp/boot.iso -boot d -net tap -net nic -m 256
and boot.iso is the fedora7 net install image (you can find it on any
mirror: fedora/linux/releases/7/Fedora/arch/os/images/boot.iso).
The guest kernel doesn't respond to sysrq, so I don't known exactly
where it's hanging. The stack trace on the host seems rather
uninteresting:
qemu S 00000002 2404 18905 7312 (NOTLB)
dca4db48 00000086 00000000 00000002 b0478900 eec4a0f0 b02f418b b0478900
0000000a 00000000 eec4a0f0 ef31ca70 267db8c3 000008c7 00003ea3 eec4a1fc
b1810980 efcc62a0 b0478900 b0129580 00000000 00000292 dca4db58 0023935c
Call Trace:
[<b02f418b>] _spin_unlock_irqrestore+0x34/0x58
[<b0129580>] __mod_timer+0x9d/0xa7
[<b02f2258>] schedule_timeout+0x70/0x8d
[<b02f418b>] _spin_unlock_irqrestore+0x34/0x58
[<b01291e0>] process_timeout+0x0/0x5
[<b02f2253>] schedule_timeout+0x6b/0x8d
[<b0171eb1>] do_select+0x399/0x3e7
[<b0172496>] __pollwait+0x0/0xac
[<b011c720>] default_wake_function+0x0/0xc
[<b0171766>] free_poll_entry+0xe/0x16
[<b0171786>] poll_freewait+0x18/0x4c
[<b0171abc>] do_sys_poll+0x302/0x327
[<b0172496>] __pollwait+0x0/0xac
[<b011c720>] default_wake_function+0x0/0xc
[<b011b26a>] task_rq_lock+0x36/0x5d
[<b02f3c59>] _spin_lock+0x33/0x3e
[<b02f4197>] _spin_unlock_irqrestore+0x40/0x58
[<b011c716>] try_to_wake_up+0x325/0x32f
[<b013b017>] mark_held_locks+0x39/0x53
[<b02f418b>] _spin_unlock_irqrestore+0x34/0x58
[<b0103ec0>] restore_nocheck+0x12/0x15
[<b013b1ee>] trace_hardirqs_on+0x11a/0x13d
[<b010679a>] do_IRQ+0xc4/0xde
[<b0103ec0>] restore_nocheck+0x12/0x15
[<b01721ed>] core_sys_select+0x2ee/0x30f
[<b0103189>] setup_sigcontext+0x105/0x189
[<b02f41cf>] _spin_unlock_irq+0x20/0x41
[<b013b1ee>] trace_hardirqs_on+0x11a/0x13d
[<b0103a56>] do_notify_resume+0x5d1/0x611
[<b02f41da>] _spin_unlock_irq+0x2b/0x41
[<b01039b4>] do_notify_resume+0x52f/0x611
[<b0103ec0>] restore_nocheck+0x12/0x15
[<b010898b>] convert_fxsr_from_user+0x26/0xe6
[<b01725e6>] sys_select+0xa4/0x187
[<b0103ec0>] restore_nocheck+0x12/0x15
[<b013b1ee>] trace_hardirqs_on+0x11a/0x13d
[<b0103e78>] syscall_call+0x7/0xb
=======================
qemu S CF9E5DC0 2996 18911 7312 (NOTLB)
cf9e5dd4 00000082 00000002 cf9e5dc0 cf9e5dbc 00000000 b013b1ee cf9e5ea0
00000007 00000001 d252b4f0 b194c030 70a8bf29 000008ac 0000a554 d252b5fc
b181a980 efcc62a0 00232330 00000003 00000000 00000000 cf9e5ea0 efcc62d4
Call Trace:
[<b013b1ee>] trace_hardirqs_on+0x11a/0x13d
[<b013de28>] futex_wait+0x251/0x3ed
[<b0134156>] hrtimer_wakeup+0x0/0x18
[<b013de19>] futex_wait+0x242/0x3ed
[<b011c720>] default_wake_function+0x0/0xc
[<b013e906>] do_futex+0x6c/0xaad
[<b012acf7>] sys_rt_sigqueueinfo+0x44/0x4e
[<b0135a4e>] getnstimeofday+0x30/0xbe
[<b0134627>] ktime_get_ts+0x16/0x44
[<b013f40f>] sys_futex+0xc8/0xda
[<b0103e78>] syscall_call+0x7/0xb
=======================
I'm attaching the dmesg for both -kvm and -no-kvm cases.
Luca
--
"La teoria e` quando sappiamo come funzionano le cose ma non funzionano.
La pratica e` quando le cose funzionano ma non sappiamo perche`.
Abbiamo unito la teoria e la pratica: le cose non funzionano piu` e non
sappiamo il perche`." -- A. Einstein
Linux version 2.6.21-1.3194.fc7 ([email protected]) (gcc version 4.1.2 20070502 (Red Hat 4.1.2-12)) #1 SMP Wed May 23 22:11:19 EDT 2007
BIOS-provided physical RAM map:
sanitize start
sanitize end
copy_e820_map() start: 0000000000000000 size: 000000000009fc00 end: 000000000009fc00 type: 1
copy_e820_map() type is E820_RAM
copy_e820_map() start: 000000000009fc00 size: 0000000000000400 end: 00000000000a0000 type: 2
copy_e820_map() start: 00000000000e8000 size: 0000000000018000 end: 0000000000100000 type: 2
copy_e820_map() start: 0000000000100000 size: 000000000ff00000 end: 0000000010000000 type: 1
copy_e820_map() type is E820_RAM
copy_e820_map() start: 00000000fffc0000 size: 0000000000040000 end: 0000000100000000 type: 2
BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
BIOS-e820: 00000000000e8000 - 0000000000100000 (reserved)
BIOS-e820: 0000000000100000 - 0000000010000000 (usable)
BIOS-e820: 00000000fffc0000 - 0000000100000000 (reserved)
0MB HIGHMEM available.
256MB LOWMEM available.
Using x86 segment limits to approximate NX protection
Entering add_active_range(0, 0, 65536) 0 entries of 256 used
Zone PFN ranges:
DMA 0 -> 4096
Normal 4096 -> 65536
HighMem 65536 -> 65536
early_node_map[1] active PFN ranges
0: 0 -> 65536
On node 0 totalpages: 65536
DMA zone: 32 pages used for memmap
DMA zone: 0 pages reserved
DMA zone: 4064 pages, LIFO batch:0
Normal zone: 480 pages used for memmap
Normal zone: 60960 pages, LIFO batch:15
HighMem zone: 0 pages used for memmap
DMI not present or invalid.
Using APIC driver default
ACPI: no DMI BIOS year, acpi=force is required to enable ACPI
ACPI: Disabling ACPI support
Allocating PCI resources starting at 20000000 (gap: 10000000:effc0000)
Built 1 zonelists. Total pages: 65024
Kernel command line: initrd=initrd.img console=tty0 console=ttyS0 debug BOOT_IMAGE=vmlinuz
Found and enabled local APIC!
mapped APIC to ffffd000 (fee00000)
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Initializing CPU#0
CPU 0 irqstacks, hard=c076e000 soft=c074e000
PID hash table entries: 1024 (order: 10, 4096 bytes)
Detected 2135.363 MHz processor.
Console: colour VGA+ 80x25
Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
Memory: 249556k/262144k available (2037k kernel code, 12036k reserved, 1069k data, 236k init, 0k highmem)
virtual kernel memory layout:
fixmap : 0xffc55000 - 0xfffff000 (3752 kB)
pkmap : 0xff800000 - 0xffc00000 (4096 kB)
vmalloc : 0xd0800000 - 0xff7fe000 ( 751 MB)
lowmem : 0xc0000000 - 0xd0000000 ( 256 MB)
.init : 0xc070e000 - 0xc0749000 ( 236 kB)
.data : 0xc05fd722 - 0xc0708cb4 (1069 kB)
.text : 0xc0400000 - 0xc05fd722 (2037 kB)
Checking if this processor honours the WP bit even in supervisor mode... Ok.
Calibrating delay using timer specific routine.. 17122.84 BogoMIPS (lpj=8561424)
Security Framework v1.0.0 initialized
SELinux: Initializing.
SELinux: Starting in permissive mode
selinux_register_security: Registering secondary module capability
Capability LSM initialized as secondary
Mount-cache hash table entries: 512
CPU: After generic identify, caps: 0781abfd 00000000 00000000 00000000 00000001 00000000 00000000
CPU: L1 I cache: 8K
CPU: L2 cache: 128K
CPU: After all inits, caps: 0781a3fd 00000000 00000000 00000040 00000001 00000000 00000000
Checking 'hlt' instruction... OK.
SMP alternatives: switching to UP code
Freeing SMP alternatives: 13k freed
CPU0: Intel Pentium II (Klamath) stepping 03
SMP motherboard not detected.
Brought up 1 CPUs
sizeof(vma)=84 bytes
sizeof(page)=32 bytes
sizeof(inode)=336 bytes
sizeof(dentry)=132 bytes
sizeof(ext3inode)=488 bytes
sizeof(buffer_head)=56 bytes
sizeof(skbuff)=176 bytes
sizeof(task_struct)=1376 bytes
Time: 19:24:25 Date: 05/04/107
NET: Registered protocol family 16
PCI: PCI BIOS revision 2.10 entry at 0xf9fa0, last bus=0
PCI: Using configuration type 1
Setting up standard PCI resources
ACPI: Interpreter disabled.
Linux Plug and Play Support v0.97 (c) Adam Belay
pnp: PnP ACPI: disabled
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
PCI: Probing PCI hardware
PCI: Probing PCI hardware (bus 00)
* Found PM-Timer Bug on the chipset. Due to workarounds for a bug,
* this clock source is slow. Consider trying other clock sources
PCI quirk: region b100-b10f claimed by PIIX4 SMB
Boot video device is 0000:00:02.0
PCI: Using IRQ router PIIX/ICH [8086/7000] at 0000:00:01.0
PCI: BIOS reporting unknown device 01:00
PCI: BIOS reporting unknown device 01:00
PCI: BIOS reporting unknown device 01:00
PCI: BIOS reporting unknown device 01:00
PCI: BIOS reporting unknown device 01:00
PCI: BIOS reporting unknown device 01:00
NetLabel: Initializing
NetLabel: domain hash size = 128
NetLabel: protocols = UNLABELED CIPSOv4
NetLabel: unlabeled traffic allowed by default
PCI: Ignore bogus resource 6 [0:0] of 0000:00:02.0
NET: Registered protocol family 2
Linux version 2.6.21-1.3194.fc7 ([email protected]) (gcc version 4.1.2 20070502 (Red Hat 4.1.2-12)) #1 SMP Wed May 23 22:11:19 EDT 2007
BIOS-provided physical RAM map:
sanitize start
sanitize end
copy_e820_map() start: 0000000000000000 size: 000000000009fc00 end: 000000000009fc00 type: 1
copy_e820_map() type is E820_RAM
copy_e820_map() start: 000000000009fc00 size: 0000000000000400 end: 00000000000a0000 type: 2
copy_e820_map() start: 00000000000e8000 size: 0000000000018000 end: 0000000000100000 type: 2
copy_e820_map() start: 0000000000100000 size: 000000000ff00000 end: 0000000010000000 type: 1
copy_e820_map() type is E820_RAM
copy_e820_map() start: 00000000fffc0000 size: 0000000000040000 end: 0000000100000000 type: 2
BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
BIOS-e820: 00000000000e8000 - 0000000000100000 (reserved)
BIOS-e820: 0000000000100000 - 0000000010000000 (usable)
BIOS-e820: 00000000fffc0000 - 0000000100000000 (reserved)
0MB HIGHMEM available.
256MB LOWMEM available.
Using x86 segment limits to approximate NX protection
Entering add_active_range(0, 0, 65536) 0 entries of 256 used
Zone PFN ranges:
DMA 0 -> 4096
Normal 4096 -> 65536
HighMem 65536 -> 65536
early_node_map[1] active PFN ranges
0: 0 -> 65536
On node 0 totalpages: 65536
DMA zone: 32 pages used for memmap
DMA zone: 0 pages reserved
DMA zone: 4064 pages, LIFO batch:0
Normal zone: 480 pages used for memmap
Normal zone: 60960 pages, LIFO batch:15
HighMem zone: 0 pages used for memmap
DMI not present or invalid.
Using APIC driver default
ACPI: no DMI BIOS year, acpi=force is required to enable ACPI
ACPI: Disabling ACPI support
Allocating PCI resources starting at 20000000 (gap: 10000000:effc0000)
Built 1 zonelists. Total pages: 65024
Kernel command line: initrd=initrd.img console=tty0 console=ttyS0 debug BOOT_IMAGE=vmlinuz
Found and enabled local APIC!
mapped APIC to ffffd000 (fee00000)
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Initializing CPU#0
CPU 0 irqstacks, hard=c076e000 soft=c074e000
PID hash table entries: 1024 (order: 10, 4096 bytes)
Detected 2135.092 MHz processor.
Console: colour VGA+ 80x25
Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
Memory: 249556k/262144k available (2037k kernel code, 12036k reserved, 1069k data, 236k init, 0k highmem)
virtual kernel memory layout:
fixmap : 0xffc55000 - 0xfffff000 (3752 kB)
pkmap : 0xff800000 - 0xffc00000 (4096 kB)
vmalloc : 0xd0800000 - 0xff7fe000 ( 751 MB)
lowmem : 0xc0000000 - 0xd0000000 ( 256 MB)
.init : 0xc070e000 - 0xc0749000 ( 236 kB)
.data : 0xc05fd722 - 0xc0708cb4 (1069 kB)
.text : 0xc0400000 - 0xc05fd722 (2037 kB)
Checking if this processor honours the WP bit even in supervisor mode... Ok.
Calibrating delay using timer specific routine.. 17104.71 BogoMIPS (lpj=8552357)
Security Framework v1.0.0 initialized
SELinux: Initializing.
SELinux: Starting in permissive mode
selinux_register_security: Registering secondary module capability
Capability LSM initialized as secondary
Mount-cache hash table entries: 512
CPU: After generic identify, caps: 0781abfd 00000000 00000000 00000000 00000001 00000000 00000000
CPU: L1 I cache: 8K
CPU: L2 cache: 128K
CPU: After all inits, caps: 0781a3fd 00000000 00000000 00000040 00000001 00000000 00000000
Checking 'hlt' instruction... OK.
SMP alternatives: switching to UP code
Freeing SMP alternatives: 13k freed
CPU0: Intel Pentium II (Klamath) stepping 03
SMP motherboard not detected.
Brought up 1 CPUs
sizeof(vma)=84 bytes
sizeof(page)=32 bytes
sizeof(inode)=336 bytes
sizeof(dentry)=132 bytes
sizeof(ext3inode)=488 bytes
sizeof(buffer_head)=56 bytes
sizeof(skbuff)=176 bytes
sizeof(task_struct)=1376 bytes
Time: 19:26:14 Date: 05/04/107
NET: Registered protocol family 16
PCI: PCI BIOS revision 2.10 entry at 0xf9fa0, last bus=0
PCI: Using configuration type 1
Setting up standard PCI resources
ACPI: Interpreter disabled.
Linux Plug and Play Support v0.97 (c) Adam Belay
pnp: PnP ACPI: disabled
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
PCI: Probing PCI hardware
PCI: Probing PCI hardware (bus 00)
* Found PM-Timer Bug on the chipset. Due to workarounds for a bug,
* this clock source is slow. Consider trying other clock sources
PCI quirk: region b100-b10f claimed by PIIX4 SMB
Boot video device is 0000:00:02.0
PCI: Using IRQ router PIIX/ICH [8086/7000] at 0000:00:01.0
PCI: BIOS reporting unknown device 01:00
PCI: BIOS reporting unknown device 01:00
PCI: BIOS reporting unknown device 01:00
PCI: BIOS reporting unknown device 01:00
PCI: BIOS reporting unknown device 01:00
PCI: BIOS reporting unknown device 01:00
NetLabel: Initializing
NetLabel: domain hash size = 128
NetLabel: protocols = UNLABELED CIPSOv4
NetLabel: unlabeled traffic allowed by default
Time: tsc clocksource has been installed.
PCI: Ignore bogus resource 6 [0:0] of 0000:00:02.0
NET: Registered protocol family 2
IP route cache hash table entries: 2048 (order: 1, 8192 bytes)
TCP established hash table entries: 8192 (order: 4, 98304 bytes)
TCP bind hash table entries: 8192 (order: 4, 65536 bytes)
TCP: Hash tables configured (established 8192 bind 8192)
TCP reno registered
checking if image is initramfs... it is
Freeing initrd memory: 5541k freed
apm: BIOS version 1.2 Flags 0x03 (Driver version 1.16ac)
audit: initializing netlink socket (disabled)
audit(1180985175.184:1): initialized
Total HugeTLB memory allocated, 0
VFS: Disk quotas dquot_6.5.1
Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
SELinux: Registering netfilter hooks
ksign: Installing public key data
Loading keyring
- Added public key C3680E46D35DB7E1
- User ID: Red Hat, Inc. (Kernel Module GPG key)
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered (default)
Limiting direct PCI/PCI transfers.
PCI: PIIX3: Enabling Passive Release on 0000:00:01.0
Activating ISA DMA hang workarounds.
isapnp: Scanning for PnP cards...
isapnp: No Plug & Play device found
Real Time Clock Driver v1.12ac
Non-volatile memory driver v1.2
Linux agpgart interface v0.102 (c) Dave Jones
Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled
�serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16450
Clocksource tsc unstable (delta = 1700358775 ns)
RAMDISK driver initialized: 16 RAM disks of 16384K size 4096 blocksize
Time: pit clocksource has been installed.
input: Macintosh mouse button emulation as /class/input/input0
usbcore: registered new interface driver libusual
usbcore: registered new interface driver hiddev
usbcore: registered new interface driver usbhid
drivers/usb/input/hid-core.c: v2.6:USB HID core driver
PNP: No PS/2 controller found. Probing ports directly.
serio: i8042 KBD port at 0x60,0x64 irq 1
serio: i8042 AUX port at 0x60,0x64 irq 12
mice: PS/2 mouse device common for all mice
input: AT Translated Set 2 keyboard as /class/input/input1
TCP bic registered
Initializing XFRM netlink socket
NET: Registered protocol family 1
NET: Registered protocol family 17
Using IPI No-Shortcut mode
Magic number: 11:688:444
drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
Freeing unused kernel memory: 236k freed
Write protecting the kernel read-only data: 803k
Greetings.
anaconda installer init version 11.2.0.66 starting
mounting /proc filesystem... done
creating /dev filesystem... done
mounting /dev/pts (unix98 pty) filesystem... done
mounting /sys filesystem... done
input: ImExPS/2 Generic Explorer Mouse as /class/input/input2
anaconda installer init version 11.2.0.66 using a serial console
trying to remount root filesystem read write... done
mounting /tmp as ramfs... done
running install...
running /sbin/loader
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