* [Qemu-devel] question: guest will hang when call system function in migration thread.
@ 2014-12-04 15:14 陈梁
2014-12-05 10:05 ` Li Guang
0 siblings, 1 reply; 2+ messages in thread
From: 陈梁 @ 2014-12-04 15:14 UTC (permalink / raw)
To: qemu list; +Cc: 陈梁
Hi all
guest will hang when call system function in migration thread. The cpu usage of vcpu thread is 100%.
the code like this:
static void *migration_thread(void *opaque)
{
MigrationState *s = opaque;
int64_t initial_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
int64_t setup_start = qemu_clock_get_ms(QEMU_CLOCK_HOST);
int64_t initial_bytes = 0;
int64_t max_size = 0;
int64_t start_time = initial_time;
bool old_vm_running = false;
//test code
system("df -h”);
qemu_savevm_state_begin(s->file, &s->params);
…
Is it anything wrong? or it is not allow to call system in migration thread?
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [Qemu-devel] question: guest will hang when call system function in migration thread.
2014-12-04 15:14 [Qemu-devel] question: guest will hang when call system function in migration thread 陈梁
@ 2014-12-05 10:05 ` Li Guang
0 siblings, 0 replies; 2+ messages in thread
From: Li Guang @ 2014-12-05 10:05 UTC (permalink / raw)
To: 陈梁; +Cc: qemu list
Hi,
which version you tested?
do you let vm continue to run after migration?
can you provide more info?
can't reproduce it on latest version.
Thanks!
On 12/04/2014 11:14 PM, 陈梁 wrote:
> Hi all
>
> guest will hang when call system function in migration thread. The cpu usage of vcpu thread is 100%.
>
> the code like this:
>
> static void *migration_thread(void *opaque)
> {
> MigrationState *s = opaque;
> int64_t initial_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
> int64_t setup_start = qemu_clock_get_ms(QEMU_CLOCK_HOST);
> int64_t initial_bytes = 0;
> int64_t max_size = 0;
> int64_t start_time = initial_time;
> bool old_vm_running = false;
>
> //test code
> system("df -h”);
>
> qemu_savevm_state_begin(s->file, &s->params);
> …
>
> Is it anything wrong? or it is not allow to call system in migration thread?
>
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2014-12-04 15:14 [Qemu-devel] question: guest will hang when call system function in migration thread 陈梁
2014-12-05 10:05 ` Li Guang
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