11:35 p.m.
v3 patch:
https://www.redhat.com/archives/libvir-list/2018-September/msg00950.html
---
Changes in v4:
- Split up v3 into four parts
Wang Yechao (4):
qemu: Split up qemuDomainRemoveInactive
qemu: Create a qemuDomainRemoveInactiveLocked
qemu: Create a qemuDomainRemoveInactiveJobLocked
qemu: Fix deadlock if create qemuProcessReconnect thread failed
src/qemu/qemu_domain.c | 79 ++++++++++++++++++++++++++++++++++++++++---------
src/qemu/qemu_domain.h | 3 ++
src/qemu/qemu_process.c | 2 +-
3 files changed, 69 insertions(+), 15 deletions(-)
--
1.8.3.1
11:35 p.m.
New subject: [libvirt] [PATCH v4 1/4] qemu: Split up qemuDomainRemoveInactive
Split up qemuDomainRemoveInactive into
qemuDomainRemoveInactiveCommon and virDomainObjListRemove
Signed-off-by: Wang Yechao <wang.yechao255(a)zte.com.cn>
---
src/qemu/qemu_domain.c | 38 +++++++++++++++++++++++---------------
1 file changed, 23 insertions(+), 15 deletions(-)
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 2fd8a2a..191113a 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -8344,23 +8344,13 @@ qemuDomainSnapshotDiscardAllMetadata(virQEMUDriverPtr driver,
}
-/**
- * qemuDomainRemoveInactive:
- *
- * The caller must hold a lock to the vm.
- */
-void
-qemuDomainRemoveInactive(virQEMUDriverPtr driver,
- virDomainObjPtr vm)
+static void
+qemuDomainRemoveInactiveCommon(virQEMUDriverPtr driver,
+ virDomainObjPtr vm)
{
char *snapDir;
virQEMUDriverConfigPtr cfg;
- if (vm->persistent) {
- /* Short-circuit, we don't want to remove a persistent domain */
- return;
- }
-
cfg = virQEMUDriverGetConfig(driver);
/* Remove any snapshot metadata prior to removing the domain */
@@ -8379,13 +8369,31 @@ qemuDomainRemoveInactive(virQEMUDriverPtr driver,
}
qemuExtDevicesCleanupHost(driver, vm->def);
- virDomainObjListRemove(driver->domains, vm);
-
virObjectUnref(cfg);
}
/**
+ * qemuDomainRemoveInactive:
+ *
+ * The caller must hold a lock to the vm.
+ */
+void
+qemuDomainRemoveInactive(virQEMUDriverPtr driver,
+ virDomainObjPtr vm)
+{
+ if (vm->persistent) {
+ /* Short-circuit, we don't want to remove a persistent domain */
+ return;
+ }
+
+ qemuDomainRemoveInactiveCommon(driver, vm);
+
+ virDomainObjListRemove(driver->domains, vm);
+}
+
+
+/**
* qemuDomainRemoveInactiveJob:
*
* Just like qemuDomainRemoveInactive but it tries to grab a
--
1.8.3.1
11:35 p.m.
New subject: [libvirt] [PATCH v4 2/4] qemu: Create a qemuDomainRemoveInactiveLocked
Create a qemuDomainRemoveInactiveLocked which is a copy of
qemuDomainRemoveInactive except that instead of calling
virDomainObjListRemove it calls virDomainObjListRemoveLocked.
Signed-off-by: Wang Yechao <wang.yechao255(a)zte.com.cn>
---
src/qemu/qemu_domain.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 191113a..22436d2 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -8394,6 +8394,28 @@ qemuDomainRemoveInactive(virQEMUDriverPtr driver,
/**
+ * qemuDomainRemoveInactiveLocked:
+ *
+ * The caller must hold a lock to the vm and must hold the
+ * lock on driver->domains in order to call the remove obj
+ * from locked list method.
+ */
+static void
+qemuDomainRemoveInactiveLocked(virQEMUDriverPtr driver,
+ virDomainObjPtr vm)
+{
+ if (vm->persistent) {
+ /* Short-circuit, we don't want to remove a persistent domain */
+ return;
+ }
+
+ qemuDomainRemoveInactiveCommon(driver, vm);
+
+ virDomainObjListRemoveLocked(driver->domains, vm);
+}
+
+
+/**
* qemuDomainRemoveInactiveJob:
*
* Just like qemuDomainRemoveInactive but it tries to grab a
--
1.8.3.1
11:35 p.m.
New subject: [libvirt] [PATCH v4 3/4] qemu: Create a qemuDomainRemoveInactiveJobLocked
Create a qemuDomainRemoveInactiveJobLocked which copies
qemuDomainRemoveInactiveJob except of course calling
virDomainObjListRemoveLocked.
Signed-off-by: Wang Yechao <wang.yechao255(a)zte.com.cn>
---
src/qemu/qemu_domain.c | 21 +++++++++++++++++++++
src/qemu/qemu_domain.h | 3 +++
2 files changed, 24 insertions(+)
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 22436d2..b20d430 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -8438,6 +8438,27 @@ qemuDomainRemoveInactiveJob(virQEMUDriverPtr driver,
}
+/**
+ * qemuDomainRemoveInactiveJobLocked:
+ *
+ * Similar to qemuDomainRemoveInactiveJob, except that the caller must
+ * also hold the lock @driver->domains
+ */
+void
+qemuDomainRemoveInactiveJobLocked(virQEMUDriverPtr driver,
+ virDomainObjPtr vm)
+{
+ bool haveJob;
+
+ haveJob = qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) >= 0;
+
+ qemuDomainRemoveInactiveLocked(driver, vm);
+
+ if (haveJob)
+ qemuDomainObjEndJob(driver, vm);
+}
+
+
void
qemuDomainSetFakeReboot(virQEMUDriverPtr driver,
virDomainObjPtr vm,
diff --git a/src/qemu/qemu_domain.h b/src/qemu/qemu_domain.h
index 914c9a6..ecbe2e8 100644
--- a/src/qemu/qemu_domain.h
+++ b/src/qemu/qemu_domain.h
@@ -704,6 +704,9 @@ void qemuDomainRemoveInactive(virQEMUDriverPtr driver,
void qemuDomainRemoveInactiveJob(virQEMUDriverPtr driver,
virDomainObjPtr vm);
+void qemuDomainRemoveInactiveJobLocked(virQEMUDriverPtr driver,
+ virDomainObjPtr vm);
+
void qemuDomainSetFakeReboot(virQEMUDriverPtr driver,
virDomainObjPtr vm,
bool value);
--
1.8.3.1
11:35 p.m.
New subject: [libvirt] [PATCH v4 4/4] qemu: Fix deadlock if create qemuProcessReconnect thread failed
qemuProcessReconnectHelper has hold lock on doms, if create
qemuProcessReconnect thread failed, calls
qemuDomainRemoveInactiveJob will lead to deadlock.
Modify qemuProcessReconnectHelper to call
qemuDomainRemoveInactiveJobLocked.
Signed-off-by: Wang Yechao <wang.yechao255(a)zte.com.cn>
---
src/qemu/qemu_process.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index f9a01da..711db10 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -8033,7 +8033,7 @@ qemuProcessReconnectHelper(virDomainObjPtr obj,
*/
qemuProcessStop(src->driver, obj, VIR_DOMAIN_SHUTOFF_FAILED,
QEMU_ASYNC_JOB_NONE, 0);
- qemuDomainRemoveInactiveJob(src->driver, obj);
+ qemuDomainRemoveInactiveJobLocked(src->driver, obj);
virDomainObjEndAPI(&obj);
virNWFilterUnlockFilterUpdates();
--
1.8.3.1
6:19 a.m.
On 9/21/18 12:35 AM, Wang Yechao wrote:
v3 patch:
https://www.redhat.com/archives/libvir-list/2018-September/msg00950.html
---
Changes in v4:
- Split up v3 into four parts
Wang Yechao (4):
qemu: Split up qemuDomainRemoveInactive
qemu: Create a qemuDomainRemoveInactiveLocked
qemu: Create a qemuDomainRemoveInactiveJobLocked
qemu: Fix deadlock if create qemuProcessReconnect thread failed
src/qemu/qemu_domain.c | 79 ++++++++++++++++++++++++++++++++++++++++---------
src/qemu/qemu_domain.h | 3 ++
src/qemu/qemu_process.c | 2 +-
3 files changed, 69 insertions(+), 15 deletions(-)
Thanks for splitting. I cleaned up the commit messages, merged patches
2&3 (must be able successfully build after each patch), and pushed the
series.
Reviewed-by: John Ferlan <jferlan(a)redhat.com>
John
2253
days inactive
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5 comments
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Wang Yechao