* [Qemu-devel] Fwd: Guest hangs when I do general operation.
@ 2010-09-07 2:43 ` Amos Kong
0 siblings, 0 replies; 8+ messages in thread
From: Amos Kong @ 2010-09-07 2:43 UTC (permalink / raw)
To: qemu-devel; +Cc: Avi Kivity, kvm
---------- Forwarded message ----------
From: Amos Kong <kongjianjun@gmail.com>
Date: Tue, Sep 7, 2010 at 7:49 AM
Subject: Guest hangs when I do general operation.
To: 王箫 <sirouni@gmail.com>
kvm upstream: 43e413f7db1a4a90671dda0b1d6c1f8cb30673ed KVM: Whitespace
changes to remove differences wrt kvm-updates/2.6.37
qemu upstream: cb93bbdd7db92e50ff5e60a346b23df68acae46b Fix OpenBSD
linker warning
# ./x86_64-softmmu/qemu-system-x86_64 ~/win7-32.qcow2 -m 1024 -vnc :0
-usbdevice tablet -cpu qemu64 -snapshot -enable-kvm -bios pc-bios/bios.bin
Guest hangs when I do general operation.
It's fine when using upstream qemu-kvm. this problem only occurred
one time when I debug by gdb, after execute 'continue', guest runs
normally.
debug msg of (qemu + kvm)
(gdb) c
Continuing.
Program received signal SIGUSR2, User defined signal 2.
0x00007fc7d4d7bfb3 in select () at ../sysdeps/unix/syscall-template.S:82
82 ../sysdeps/unix/syscall-template.S: No such file or directory.
in ../sysdeps/unix/syscall-template.S
(gdb) bt
#0 0x00007fc7d4d7bfb3 in select () at ../sysdeps/unix/syscall-template.S:82
#1 0x00000000004270ea in qemu_aio_wait () at aio.c:193
#2 0x0000000000426475 in bdrv_read_em (bs=0x186a340,
sector_num=6343320, buf=0x7fc7c5a9b010 "RCRD(", nb_sectors=104) at
block.c:2432
#3 0x000000000043c437 in qcow_read (bs=0x1838680, start_sect=<value
optimized out>, cluster_offset=<value optimized out>, n_start=<value
optimized out>,
n_end=<value optimized out>) at block/qcow2-cluster.c:368
#4 copy_sectors (bs=0x1838680, start_sect=<value optimized out>,
cluster_offset=<value optimized out>, n_start=<value optimized out>,
n_end=<value optimized out>) at block/qcow2-cluster.c:406
#5 0x000000000043c69b in qcow2_alloc_cluster_link_l2 (bs=0x1838680,
m=0x1d5d798) at block/qcow2-cluster.c:689
#6 0x00000000004378d5 in qcow_aio_write_cb (opaque=0x1d5d700, ret=0)
at block/qcow2.c:566
#7 0x0000000000429c5d in posix_aio_process_queue (opaque=<value
optimized out>) at posix-aio-compat.c:459
#8 0x0000000000429d0c in posix_aio_read (opaque=0x183a250) at
posix-aio-compat.c:489
#9 0x000000000051fec6 in main_loop_wait (nonblocking=<value optimized
out>) at /home/devel/qemu/vl.c:1281
#10 0x00000000005209bd in main_loop (argc=0, argv=<value optimized
out>, envp=<value optimized out>) at /home/devel/qemu/vl.c:1332
#11 main (argc=0, argv=<value optimized out>, envp=<value optimized
out>) at /home/devel/qemu/vl.c:2995
---
kvm statistics
efer_reload 0 0
exits 8714404 0
fpu_reload 115538 0
halt_exits 66926 0
halt_wakeup 0 0
host_state_reload 2366344 0
hypercalls 0 0
insn_emulation 1848818 0
insn_emulation_fail 0 0
invlpg 662261 0
io_exits 1293800 0
irq_exits 531478 0
irq_injections 109588 0
irq_window 114236 0
largepages 0 0
mmio_exits 705388 0
mmu_cache_miss 355201 0
mmu_flooded 298554 0
mmu_pde_zapped 25705 0
mmu_pte_updated 241815 0
mmu_pte_write 15701676 0
mmu_recycled 546 0
mmu_shadow_zapped 527220 0
mmu_unsync 4203 0
nmi_injections 0 0
nmi_window 0 0
pf_fixed 3107522 0
pf_guest 631148 0
remote_tlb_flush 31032 0
request_irq 0 0
signal_exits 310597 0
tlb_flush 2164428 0
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: [Qemu-devel] Fwd: Guest hangs when I do general operation.
2010-09-07 2:43 ` [Qemu-devel] " Amos Kong
@ 2010-09-07 17:55 ` Blue Swirl
-1 siblings, 0 replies; 8+ messages in thread
From: Blue Swirl @ 2010-09-07 17:55 UTC (permalink / raw)
To: Amos Kong; +Cc: qemu-devel, Avi Kivity, kvm
On Tue, Sep 7, 2010 at 2:43 AM, Amos Kong <kongjianjun@gmail.com> wrote:
> ---------- Forwarded message ----------
> From: Amos Kong <kongjianjun@gmail.com>
> Date: Tue, Sep 7, 2010 at 7:49 AM
> Subject: Guest hangs when I do general operation.
> To: 王箫 <sirouni@gmail.com>
>
>
> kvm upstream: 43e413f7db1a4a90671dda0b1d6c1f8cb30673ed KVM: Whitespace
> changes to remove differences wrt kvm-updates/2.6.37
> qemu upstream: cb93bbdd7db92e50ff5e60a346b23df68acae46b Fix OpenBSD
> linker warning
>
> # ./x86_64-softmmu/qemu-system-x86_64 ~/win7-32.qcow2 -m 1024 -vnc :0
> -usbdevice tablet -cpu qemu64 -snapshot -enable-kvm -bios pc-bios/bios.bin
>
> Guest hangs when I do general operation.
> It's fine when using upstream qemu-kvm. this problem only occurred
> one time when I debug by gdb, after execute 'continue', guest runs
> normally.
>
> debug msg of (qemu + kvm)
> (gdb) c
> Continuing.
>
> Program received signal SIGUSR2, User defined signal 2.
This is normal, we use SIGUSR2 for AIO. By default, GDB stops and
prints a message about the signal. The same thing can happen with
SIGALRM.
GDB command 'handle SIGUSR2 nostop noprint pass' lets the program
continue without stopping.
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Qemu-devel] Fwd: Guest hangs when I do general operation.
@ 2010-09-07 17:55 ` Blue Swirl
0 siblings, 0 replies; 8+ messages in thread
From: Blue Swirl @ 2010-09-07 17:55 UTC (permalink / raw)
To: Amos Kong; +Cc: qemu-devel, kvm, Avi Kivity
On Tue, Sep 7, 2010 at 2:43 AM, Amos Kong <kongjianjun@gmail.com> wrote:
> ---------- Forwarded message ----------
> From: Amos Kong <kongjianjun@gmail.com>
> Date: Tue, Sep 7, 2010 at 7:49 AM
> Subject: Guest hangs when I do general operation.
> To: 王箫 <sirouni@gmail.com>
>
>
> kvm upstream: 43e413f7db1a4a90671dda0b1d6c1f8cb30673ed KVM: Whitespace
> changes to remove differences wrt kvm-updates/2.6.37
> qemu upstream: cb93bbdd7db92e50ff5e60a346b23df68acae46b Fix OpenBSD
> linker warning
>
> # ./x86_64-softmmu/qemu-system-x86_64 ~/win7-32.qcow2 -m 1024 -vnc :0
> -usbdevice tablet -cpu qemu64 -snapshot -enable-kvm -bios pc-bios/bios.bin
>
> Guest hangs when I do general operation.
> It's fine when using upstream qemu-kvm. this problem only occurred
> one time when I debug by gdb, after execute 'continue', guest runs
> normally.
>
> debug msg of (qemu + kvm)
> (gdb) c
> Continuing.
>
> Program received signal SIGUSR2, User defined signal 2.
This is normal, we use SIGUSR2 for AIO. By default, GDB stops and
prints a message about the signal. The same thing can happen with
SIGALRM.
GDB command 'handle SIGUSR2 nostop noprint pass' lets the program
continue without stopping.
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Qemu-devel] Fwd: Guest hangs when I do general operation.
2010-09-07 17:55 ` Blue Swirl
@ 2010-09-08 2:51 ` Amos Kong
-1 siblings, 0 replies; 8+ messages in thread
From: Amos Kong @ 2010-09-08 2:51 UTC (permalink / raw)
To: Blue Swirl; +Cc: qemu-devel, Avi Kivity, kvm
On Wed, Sep 8, 2010 at 1:55 AM, Blue Swirl <blauwirbel@gmail.com> wrote:
> On Tue, Sep 7, 2010 at 2:43 AM, Amos Kong <kongjianjun@gmail.com> wrote:
>>
>> kvm upstream: 43e413f7db1a4a90671dda0b1d6c1f8cb30673ed KVM: Whitespace
>> changes to remove differences wrt kvm-updates/2.6.37
>> qemu upstream: cb93bbdd7db92e50ff5e60a346b23df68acae46b Fix OpenBSD
>> linker warning
>>
>> # ./x86_64-softmmu/qemu-system-x86_64 ~/win7-32.qcow2 -m 1024 -vnc :0
>> -usbdevice tablet -cpu qemu64 -snapshot -enable-kvm -bios pc-bios/bios.bin
>>
>> Guest hangs when I do general operation.
>> It's fine when using upstream qemu-kvm. this problem only occurred
>> one time when I debug by gdb, after execute 'continue', guest runs
>> normally.
>>
>> debug msg of (qemu + kvm)
>> (gdb) c
>> Continuing.
>>
>> Program received signal SIGUSR2, User defined signal 2.
>
> This is normal, we use SIGUSR2 for AIO. By default, GDB stops and
> prints a message about the signal. The same thing can happen with
> SIGALRM.
>
> GDB command 'handle SIGUSR2 nostop noprint pass' lets the program
> continue without stopping.
If ignore this signal in gdb, guest could not break.
Thanks
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Qemu-devel] Fwd: Guest hangs when I do general operation.
@ 2010-09-08 2:51 ` Amos Kong
0 siblings, 0 replies; 8+ messages in thread
From: Amos Kong @ 2010-09-08 2:51 UTC (permalink / raw)
To: Blue Swirl; +Cc: qemu-devel, kvm, Avi Kivity
On Wed, Sep 8, 2010 at 1:55 AM, Blue Swirl <blauwirbel@gmail.com> wrote:
> On Tue, Sep 7, 2010 at 2:43 AM, Amos Kong <kongjianjun@gmail.com> wrote:
>>
>> kvm upstream: 43e413f7db1a4a90671dda0b1d6c1f8cb30673ed KVM: Whitespace
>> changes to remove differences wrt kvm-updates/2.6.37
>> qemu upstream: cb93bbdd7db92e50ff5e60a346b23df68acae46b Fix OpenBSD
>> linker warning
>>
>> # ./x86_64-softmmu/qemu-system-x86_64 ~/win7-32.qcow2 -m 1024 -vnc :0
>> -usbdevice tablet -cpu qemu64 -snapshot -enable-kvm -bios pc-bios/bios.bin
>>
>> Guest hangs when I do general operation.
>> It's fine when using upstream qemu-kvm. this problem only occurred
>> one time when I debug by gdb, after execute 'continue', guest runs
>> normally.
>>
>> debug msg of (qemu + kvm)
>> (gdb) c
>> Continuing.
>>
>> Program received signal SIGUSR2, User defined signal 2.
>
> This is normal, we use SIGUSR2 for AIO. By default, GDB stops and
> prints a message about the signal. The same thing can happen with
> SIGALRM.
>
> GDB command 'handle SIGUSR2 nostop noprint pass' lets the program
> continue without stopping.
If ignore this signal in gdb, guest could not break.
Thanks
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: Fwd: Guest hangs when I do general operation.
2010-09-07 2:43 ` [Qemu-devel] " Amos Kong
@ 2010-09-07 21:39 ` Marcelo Tosatti
-1 siblings, 0 replies; 8+ messages in thread
From: Marcelo Tosatti @ 2010-09-07 21:39 UTC (permalink / raw)
To: Amos Kong; +Cc: qemu-devel, kvm, Avi Kivity
On Tue, Sep 07, 2010 at 10:43:38AM +0800, Amos Kong wrote:
> ---------- Forwarded message ----------
> From: Amos Kong <kongjianjun@gmail.com>
> Date: Tue, Sep 7, 2010 at 7:49 AM
> Subject: Guest hangs when I do general operation.
> To: 王箫 <sirouni@gmail.com>
>
>
> kvm upstream: 43e413f7db1a4a90671dda0b1d6c1f8cb30673ed KVM: Whitespace
> changes to remove differences wrt kvm-updates/2.6.37
> qemu upstream: cb93bbdd7db92e50ff5e60a346b23df68acae46b Fix OpenBSD
> linker warning
>
> # ./x86_64-softmmu/qemu-system-x86_64 ~/win7-32.qcow2 -m 1024 -vnc :0
> -usbdevice tablet -cpu qemu64 -snapshot -enable-kvm -bios pc-bios/bios.bin
>
> Guest hangs when I do general operation.
> It's fine when using upstream qemu-kvm. this problem only occurred
> one time when I debug by gdb, after execute 'continue', guest runs
> normally.
>
> debug msg of (qemu + kvm)
> (gdb) c
> Continuing.
>
> Program received signal SIGUSR2, User defined signal 2.
> 0x00007fc7d4d7bfb3 in select () at ../sysdeps/unix/syscall-template.S:82
> 82 ../sysdeps/unix/syscall-template.S: No such file or directory.
> in ../sysdeps/unix/syscall-template.S
> (gdb) bt
Try "handle SIGUSR2 nostop" in gdb before executing qemu-kvm.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Qemu-devel] Re: Fwd: Guest hangs when I do general operation.
@ 2010-09-07 21:39 ` Marcelo Tosatti
0 siblings, 0 replies; 8+ messages in thread
From: Marcelo Tosatti @ 2010-09-07 21:39 UTC (permalink / raw)
To: Amos Kong; +Cc: qemu-devel, kvm, Avi Kivity
On Tue, Sep 07, 2010 at 10:43:38AM +0800, Amos Kong wrote:
> ---------- Forwarded message ----------
> From: Amos Kong <kongjianjun@gmail.com>
> Date: Tue, Sep 7, 2010 at 7:49 AM
> Subject: Guest hangs when I do general operation.
> To: 王箫 <sirouni@gmail.com>
>
>
> kvm upstream: 43e413f7db1a4a90671dda0b1d6c1f8cb30673ed KVM: Whitespace
> changes to remove differences wrt kvm-updates/2.6.37
> qemu upstream: cb93bbdd7db92e50ff5e60a346b23df68acae46b Fix OpenBSD
> linker warning
>
> # ./x86_64-softmmu/qemu-system-x86_64 ~/win7-32.qcow2 -m 1024 -vnc :0
> -usbdevice tablet -cpu qemu64 -snapshot -enable-kvm -bios pc-bios/bios.bin
>
> Guest hangs when I do general operation.
> It's fine when using upstream qemu-kvm. this problem only occurred
> one time when I debug by gdb, after execute 'continue', guest runs
> normally.
>
> debug msg of (qemu + kvm)
> (gdb) c
> Continuing.
>
> Program received signal SIGUSR2, User defined signal 2.
> 0x00007fc7d4d7bfb3 in select () at ../sysdeps/unix/syscall-template.S:82
> 82 ../sysdeps/unix/syscall-template.S: No such file or directory.
> in ../sysdeps/unix/syscall-template.S
> (gdb) bt
Try "handle SIGUSR2 nostop" in gdb before executing qemu-kvm.
^ permalink raw reply [flat|nested] 8+ messages in thread