Re: [Users] about live snapshot and qemu-kvm

On Wed, Jan 1, 2014 at 4:38 AM, R P Herrold wrote: > > Out of curiousity, _what_ build environment 'flags' do you > all, participating in this thread, refer to? -- the thread > does not enumerate them explicitly, and one cannot expect to > hit by 'indirect fire', a target not exposed > > With best regards, this New Year's eve I'm far from being a programmer, but as I went to compare build environments, between qemu-kvm-rhev-0.12.1.2-2.415.el6_5.3.src.rpm and qemu-kvm-0.12.1.2-2.415.el6_5.3.src.rpm in related spec file I see [g.cecchi@tekkaman SPECS]$ diff qemu-kvm.spec.upstream qemu-kvm.spec.rhev 3c3 < %define rhev 0 --- > %define rhev 1 12928a12929 >>>>>>>> rhel-6.5 and apart other probably not trivial implications, such as guest agent part, I see that the "configure" command takes one extra argument in base RH EL 6.5, that is --disable-rhev-features The only patch file containing this keyword is kvm-Block-streaming-disable-for-RHEL.patch and inside it there are these lines that impacts configure options and related built qemu-kvm: --- a/configure +++ b/configure @@ -286,6 +286,7 @@ spice="" smartcard="" smartcard_nss="" live_snapshots="yes" +block_stream="yes" usb_redir="" # OS specific @@ -686,10 +687,22 @@ for opt do ;; --enable-live-snapshots) live_snapshots="yes" ;; + --disable-block-stream) block_stream="no" + ;; + --enable-block-stream) block_stream="yes" + ;; --disable-usb-redir) usb_redir="no" ;; --enable-usb-redir) usb_redir="yes" ;; + --disable-rhev-features) + live_snapshots="no"; + block_stream="no"; + ;; + --enable-rhev-features) + live_snapshots="yes"; + block_stream="yes"; + ;; *) echo "ERROR: unknown option $opt"; show_help="yes" ;; esac @@ -863,8 +876,12 @@ echo " --disable-smartcard-nss disable smartcard nss support" echo " --enable-smartcard-nss enable smartcard nss support" echo " --disable-live-snapshots disable live block device snapshot support" echo " --enable-live-snapshots enable live block device snapshot support" +echo " --disable-block-stream disable block streaming support" +echo " --enable-block-stream enable block streaming support" echo " --disable-usb-redir disable usb network redirection support" echo " --enable-usb-redir enable usb network redirection support" +echo " --disable-rhev-features disable RHEV-only features" +echo " --enable-rhev-features enable RHEV-only features" echo "" echo "NOTE: The object files are built at the place where configure is launched" exit 1 @@ -2271,6 +2288,7 @@ echo "Trace backend $trace_backend" echo "spice support $spice" echo "nss used $smartcard_nss" echo "Live snapshots $live_snapshots" +echo "Block streaming $block_stream" echo "xfsctl support $xfs" echo "usb net redir $usb_redir" @@ -2526,6 +2544,10 @@ if test "$live_snapshots" = "yes" ; then echo "CONFIG_LIVE_SNAPSHOTS=y" >> $config_host_mak fi +if test "$block_stream" = "yes" ; then + echo "CONFIG_BLOCK_STREAM=y" >> $config_host_mak +fi + if test "$usb_redir" = "yes" ; then echo "CONFIG_USB_REDIR=y" >> $config_host_mak fi I don't think the rhev argument has instead implications in upstream source qemu-kvm-0.12.1.2.tar.gz So I think that if you want to dig more and if you have more competences, you have to see the full spec file and the full patch above. Files downloaded here: upstream http://ftp.redhat.com/redhat/linux/enterprise/6Server/en/os/SRPMS/qemu-kv... rhev http://ftp.redhat.com/redhat/linux/enterprise/6Server/en/RHEV/SRPMS/qemu-...