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qemu: Migrate at unlimited speed by default

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Previously, qemu did not respond to monitor commands during migration if
the limit was too high. This prevented us from raising the limit
earlier. The qemu issue seems to be fixed (according to my testing) and
we may remove the 32Mb/s limit.
This commit is contained in:
Jiri Denemark 2012-08-03 18:34:06 +02:00
parent aba9abc5b7
commit 6cfdeaac55
3 changed files with 5 additions and 6 deletions
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2
src/qemu/qemu_domain.c
View File

@ -217,7 +217,7 @@ static void *qemuDomainObjPrivateAlloc(void)
if (!(priv->cons = virConsoleAlloc()))
goto error;
priv->migMaxBandwidth = QEMU_DOMAIN_DEFAULT_MIG_BANDWIDTH_MAX;
priv->migMaxBandwidth = QEMU_DOMAIN_MIG_BANDWIDTH_MAX;
return priv;

5
src/qemu/qemu_domain.h
View File

@ -38,13 +38,12 @@
(1 << VIR_DOMAIN_VIRT_KVM) | \
(1 << VIR_DOMAIN_VIRT_XEN))
# define QEMU_DOMAIN_DEFAULT_MIG_BANDWIDTH_MAX 32
# if ULONG_MAX == 4294967295
/* Qemu has a 64-bit limit, but we are limited by our historical choice of
* representing bandwidth in a long instead of a 64-bit int. */
# define QEMU_DOMAIN_FILE_MIG_BANDWIDTH_MAX ULONG_MAX
# define QEMU_DOMAIN_MIG_BANDWIDTH_MAX ULONG_MAX
# else
# define QEMU_DOMAIN_FILE_MIG_BANDWIDTH_MAX (INT64_MAX / (1024 * 1024))
# define QEMU_DOMAIN_MIG_BANDWIDTH_MAX (INT64_MAX / (1024 * 1024))
# endif
# define JOB_MASK(job) (1 << (job - 1))

4
src/qemu/qemu_migration.c
View File

@ -3187,8 +3187,8 @@ qemuMigrationToFile(struct qemud_driver *driver, virDomainObjPtr vm,
* Failure to change migration speed is not fatal. */
if (qemuDomainObjEnterMonitorAsync(driver, vm, asyncJob) == 0) {
qemuMonitorSetMigrationSpeed(priv->mon,
QEMU_DOMAIN_FILE_MIG_BANDWIDTH_MAX);
priv->migMaxBandwidth = QEMU_DOMAIN_FILE_MIG_BANDWIDTH_MAX;
QEMU_DOMAIN_MIG_BANDWIDTH_MAX);
priv->migMaxBandwidth = QEMU_DOMAIN_MIG_BANDWIDTH_MAX;
qemuDomainObjExitMonitorWithDriver(driver, vm);
}