Re: [PATCH v3 3/4] qemu: Keep numad hint after reboot

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On Thu, Aug 13, 2015 at 02:49:34PM +0200, Ján Tomko wrote:
s/reboot/daemon restart/ ?


Yes, exactly!

On Thu, Aug 13, 2015 at 10:18:33AM +0200, Martin Kletzander wrote:
The numad hint stored in priv->autoNodeset is information that gets lost
during daemon restart.  And because we would like to use that
information in the future, we also need to save it in the status XML.
For the sake of tests, we need to initialize nnumaCell_max to some
value, so that the restoration doesn't fail in our test suite.  There is
no need to fill in the actual numa cell data since the recalculating
function virCapabilitiesGetCpusForNodemask() will not fail, it will just
skip filling the data in the bitmap which we don't use in tests anyway.

Signed-off-by: Martin Kletzander <mkletzan@xxxxxxxxxx>
---
 src/qemu/qemu_domain.c  | 32 +++++++++++++++++++++++++++++++-
 tests/qemuxml2xmltest.c |  3 ++-
 tests/testutilsqemu.c   |  2 ++
 3 files changed, 35 insertions(+), 2 deletions(-)

@@ -805,15 +817,33 @@ qemuDomainObjPrivateXMLParse(xmlXPathContextPtr ctxt,
     }
     VIR_FREE(nodes);

+    if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
+        goto error;
+
+    if ((tmp = virXPathString("string(./numad/@nodeset)", ctxt))) {
+        if (virBitmapParse(tmp, 0, &priv->autoNodeset,
+                           caps->host.nnumaCell_max) < 0)
+            goto error;
+
+        if (!(priv->autoCpuset = virCapabilitiesGetCpusForNodemask(caps,
+                                                                   priv->autoNodeset)))
+            goto error;
+    }
+    virObjectUnref(caps);
+    caps = NULL;

This assignment seems redundant.


I was thinking about the future when someone adds few lines after this
and will try to use 'caps'.  Feel free to remove it with follow-up
trivial patch if you don't like it.

Jan

+    VIR_FREE(tmp);
+
     return 0;

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