[libvirt] [PATCH v3 0/9] Selective block device migration implementation

Eric Blake eblake at redhat.com
Wed Jun 3 17:11:45 UTC 2015


On 06/01/2015 02:41 PM, John Ferlan wrote:

>> And, `make` seems to fail here:
>>
>>     $ ~/tinker-space/libvirt/./autogen.sh --system
>>     $ make -j4
>>     [. . .]
>>     /home/kashyapc/tinker-space/libvirt/./src/qemu/qemu_migration.c: In function 'qemuMigrationRun':
>>     /home/kashyapc/tinker-space/libvirt/./src/qemu/qemu_migration.c:1997:17: error: 'format' may be used uninitialized in this function [-Werror=maybe-uninitialized]
>>              mon_ret = qemuMonitorDriveMirror(priv->mon, diskAlias, nbd_dest,
>>                      ^
>>     /home/kashyapc/tinker-space/libvirt/./src/qemu/qemu_migration.c:1971:21: note: 'format' was declared here
>>              const char *format;
>>
>>
> 
> See my response to 3/9.
> 
> If you initialize to NULL you'll be able to compile.

But you'll end up corrupting your guest if your source has a qcow2 disk.
 The patch needs to be tweaked to mirror to NBD as "raw" rather than as
the source's format.

>> PS: Apologies if this ends up being a double email, the first email was
>> accidentally sent from my @fedoraproject.org address (which is not
>> subscribed to this list).

Unsubscribed mails can still get through to the list, it just requires a
moderation delay on the first time an email address is seen.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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