Re: [libvirt-users] deadlock on connection loosing
В письме от Понедельник, 08-июл-2013 14:39:57 Вы написали:
On 07.07.2013 01:53, Александр wrote:
> В письме от Воскресенье, 30-июн-2013 03:41:37 пользователь Александр
написал:
>> В письме от Вторник, 25-июн-2013 11:47:10 пользователь
Michal Privoznik
....
> i have found source of problem, my code looks like this:
>
> int count = virConnectListAllDomains(connection, NULL, 0);
> ....
> domain = virDomainDefineXML(connection, d.write_to_string().c_str());
>
>
> call to virConnectListAllDomains always cause libvirt deadlock.
>
> and another question, is here exists any other way to determinate number
> of
> persistent domains ?
This code is just a reproducer. Client shouldn't be able to deadlock
libvirtd at all. Any API call should be deadlock safe (unless called
from a callback). Which reminds me - do you use callbacks?
Michal
yes, i using callbacks for errors, for now just copypasted example callback to
print errors
static void libvirt_error_handler(void *userdata, virErrorPtr err)
{
fprintf(stderr, "Failure of libvirt library call:\n");
fprintf(stderr, " Code: %d\n", err->code);
fprintf(stderr, " Domain: %d\n", err->domain);
fprintf(stderr, " Message: %s\n", err->message);
fprintf(stderr, " Level: %d\n", err->level);
fprintf(stderr, " str1: %s\n", err->str1);
fprintf(stderr, " str2: %s\n", err->str2);
fprintf(stderr, " str3: %s\n", err->str3);
fprintf(stderr, " int1: %d\n", err->int1);
fprintf(stderr, " int2: %d\n", err->int2);
}
int init_libvirt()
{
virSetErrorFunc(NULL, libvirt_error_handler);
libvirt_connection = virConnectOpen("qemu:///system");
.....
i will also check virConnectListAllDomains with correct pointer instead of
null later, now have some other work to do.
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