On 10/01/2015 08:10 AM, Martin Kletzander wrote:
Of course this will be used only in case we don't need the
memory-backend-file backend, so it should not fire until later.
So if I'm reading things right... when building the numa string, if it's
determine that "-object" and ",memdev=ram-node%zu" will be required,
then it's also required to have "-mem-alloc -mem-path ..."
(furrowing through the qemu docs was more difficult than I thought)
Signed-off-by: Martin Kletzander <mkletzan(a)redhat.com>
---
src/qemu/qemu_command.c | 4 ++++
1 file changed, 4 insertions(+)
Perhaps "outside" the domain of these changes; however, I note that the
call to qemuBuildNumaArgStr is from qemuBuildCommandLine as follows:
if (virDomainNumaGetNodeCount(def->numa)) {
if (qemuBuildNumaArgStr(cfg, def, cmd, qemuCaps, nodeset) < 0)
one of the first things done in qemuBuildNumaArgStr:
size_t ncells = virDomainNumaGetNodeCount(def->numa);
oh and of course the pesky
const long system_page_size = virGetSystemPageSizeKB();
I mentioned previously
BTW: Not noted by Coverity, but interestingly later in the code there's:
if (ncells) {
/* Fortunately, we allow only guest NUMA nodes to be continuous
* starting from zero. */
pos = ncells - 1;
}
Which if I'm reading things correct - cannot happen.
Just a note - you don't have to change/fix this, but well if you want to...
ACK to what's here as it seems reasonable - perhaps a better reason in
the commit message would help
John
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 17e5cfd71702..321a5e931350 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -8132,6 +8132,10 @@ qemuBuildNumaArgStr(virQEMUDriverConfigPtr cfg,
}
}
+ if (!needBackend &&
+ qemuBuildMemPathStr(cfg, def, qemuCaps, cmd) < 0)
+ goto cleanup;
+
for (i = 0; i < ncells; i++) {
VIR_FREE(cpumask);
if (!(cpumask = virBitmapFormat(virDomainNumaGetNodeCpumask(def->numa, i))))