3:31 a.m.
see 2/2
Peter Krempa (2):
qemuDomainPinIOThread: Copy the cpu bitmap instead of re-parsing it
qemuDomainPinIOThread: Update live definition after process pinning
src/qemu/qemu_driver.c | 18 +++++-------------
1 file changed, 5 insertions(+), 13 deletions(-)
--
2.34.1
3:31 a.m.
New subject: [PATCH 1/2] qemuDomainPinIOThread: Copy the cpu bitmap instead of re-parsing it
The bitmap recorded in the live/persistent definition was re-parsed two
more times. We can copy it which is cheaper and less verbose.
Signed-off-by: Peter Krempa <pkrempa(a)redhat.com>
---
src/qemu/qemu_driver.c | 12 ++----------
1 file changed, 2 insertions(+), 10 deletions(-)
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index e150b86cef..077547e1d3 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -5011,7 +5011,6 @@ qemuDomainPinIOThread(virDomainPtr dom,
if (def) {
virDomainIOThreadIDDef *iothrid;
- virBitmap *cpumask;
if (!(iothrid = virDomainIOThreadIDFind(def, iothread_id))) {
virReportError(VIR_ERR_INVALID_ARG,
@@ -5019,11 +5018,8 @@ qemuDomainPinIOThread(virDomainPtr dom,
goto endjob;
}
- if (!(cpumask = virBitmapNewData(cpumap, maplen)))
- goto endjob;
-
virBitmapFree(iothrid->cpumask);
- iothrid->cpumask = cpumask;
+ iothrid->cpumask = virBitmapNewCopy(pcpumap);
iothrid->autofill = false;
/* Configure the corresponding cpuset cgroup before set affinity. */
@@ -5060,7 +5056,6 @@ qemuDomainPinIOThread(virDomainPtr dom,
if (persistentDef) {
virDomainIOThreadIDDef *iothrid;
- virBitmap *cpumask;
if (!(iothrid = virDomainIOThreadIDFind(persistentDef, iothread_id))) {
virReportError(VIR_ERR_INVALID_ARG,
@@ -5068,11 +5063,8 @@ qemuDomainPinIOThread(virDomainPtr dom,
goto endjob;
}
- if (!(cpumask = virBitmapNewData(cpumap, maplen)))
- goto endjob;
-
virBitmapFree(iothrid->cpumask);
- iothrid->cpumask = cpumask;
+ iothrid->cpumask = virBitmapNewCopy(pcpumap);
iothrid->autofill = false;
ret = virDomainDefSave(persistentDef, driver->xmlopt, cfg->configDir);
--
2.34.1
3:31 a.m.
New subject: [PATCH 2/2] qemuDomainPinIOThread: Update live definition after process pinning
Otherwise we'll keep using the new pinning value even if it can't be
applied to the thread.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2040555
Signed-off-by: Peter Krempa <pkrempa(a)redhat.com>
---
src/qemu/qemu_driver.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 077547e1d3..3c0c81a6b9 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -5018,10 +5018,6 @@ qemuDomainPinIOThread(virDomainPtr dom,
goto endjob;
}
- virBitmapFree(iothrid->cpumask);
- iothrid->cpumask = virBitmapNewCopy(pcpumap);
- iothrid->autofill = false;
-
/* Configure the corresponding cpuset cgroup before set affinity. */
if (virCgroupHasController(priv->cgroup,
VIR_CGROUP_CONTROLLER_CPUSET)) {
@@ -5039,6 +5035,10 @@ qemuDomainPinIOThread(virDomainPtr dom,
if (virProcessSetAffinity(iothrid->thread_id, pcpumap, false) < 0)
goto endjob;
+ virBitmapFree(iothrid->cpumask);
+ iothrid->cpumask = virBitmapNewCopy(pcpumap);
+ iothrid->autofill = false;
+
qemuDomainSaveStatus(vm);
if (g_snprintf(paramField, VIR_TYPED_PARAM_FIELD_LENGTH,
--
2.34.1
3:49 a.m.
On a Tuesday in 2022, Peter Krempa wrote:
see 2/2
Peter Krempa (2):
qemuDomainPinIOThread: Copy the cpu bitmap instead of re-parsing it
qemuDomainPinIOThread: Update live definition after process pinning
src/qemu/qemu_driver.c | 18 +++++-------------
1 file changed, 5 insertions(+), 13 deletions(-)
Reviewed-by: Ján Tomko <jtomko(a)redhat.com>
Jano
3:51 a.m.
On Tue, Jan 18, 2022 at 10:31:44AM +0100, Peter Krempa wrote:
see 2/2
Peter Krempa (2):
qemuDomainPinIOThread: Copy the cpu bitmap instead of re-parsing it
qemuDomainPinIOThread: Update live definition after process pinning
src/qemu/qemu_driver.c | 18 +++++-------------
1 file changed, 5 insertions(+), 13 deletions(-)
Reviewed-by: Pavel Hrdina <phrdina(a)redhat.com>
1017
days inactive
1017
days old
4 comments
3 participants
participants (3)
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Ján Tomko -
Pavel Hrdina -
Peter Krempa