Re: [libvirt] [PATCH v3 4/5] qemu: Use predictable file names for memory-backend-file
On Tue, Nov 07, 2017 at 04:51:03PM +0100, Michal Privoznik wrote:
In some cases management application needs to allocate memory for
qemu upfront and then just let qemu use that. Since we don't want
to expose path for memory-backend-file anywhere in the domain
XML, we can generate predictable paths. In this case:
$memoryBackingDir/libvirt/qemu/$shortName/$alias
where $shortName is result of virDomainObjGetShortName().
diff --git
a/tests/qemuxml2argvdata/qemuxml2argv-cpu-numa-memshared.args
b/tests/qemuxml2argvdata/qemuxml2argv-cpu-numa-memshared.args
index 5700c3413..352819429 100644
--- a/tests/qemuxml2argvdata/qemuxml2argv-cpu-numa-memshared.args
+++ b/tests/qemuxml2argvdata/qemuxml2argv-cpu-numa-memshared.args
@@ -10,10 +10,12 @@ QEMU_AUDIO_DRV=none \
-M pc \
-m 214 \
-smp 16,sockets=2,cores=4,threads=2 \
--object memory-backend-file,id=ram-node0,mem-path=/var/lib/libvirt/qemu/ram,\
+-object memory-backend-file,id=ram-node0,\
+mem-path=/var/lib/libvirt/qemu/ram/libvirt/qemu/-1-QEMUGuest1/ram-node0,\
Heh, we're getting '-1' in all the paths here. Presumably this is because in
the test suite we've not bothered to set the 'id' field to any value.
I can't help thinking that virDomainObjGetShortName ought to return a fatal
error if 'id' is still -1, as in non-test suite code, this would be indication
of a significant screw up by someone trying to create names before the VM config
is updated to reflect running state. This would of course mean our tests
should set 'id' to a sensible value too.
No need to fix for this patch though - just a curiosity to look at a later
date
Regards,
Daniel
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