* Bharata B Rao (bhar...@linux.vnet.ibm.com) wrote: > On Mon, Sep 28, 2015 at 05:51:39PM +0100, Dr. David Alan Gilbert (git) wrote: > > From: "Dr. David Alan Gilbert" <dgilb...@redhat.com> > > > > This is the 8th cut of my version of postcopy. > > > > The userfaultfd linux kernel code is now in the upstream kernel > > tree, and so 4.3-rc3 can be used without modification. > > > > This qemu series can be found at: > > https://github.com/orbitfp7/qemu.git > > on the wp3-postcopy-v8 tag > > > > > > Testing status: > > * Tested heavily on x86 > > * Smoke tested on aarch64 (so it does work on different page sizes) > > * Power is unhappy for me (but gets further than the htab problem > > v7 used to have) (I get a kvm run failed) > > Seems to be completing successfully on Power. But it takes 2min for the > migration status to transition from setup to active. > > Host: 4.3.0-rc3+ > Guest: 4.3.0-rc3+ > QEMU: wp3-postcopy-v8 of your tree. > > # ./ppc64-softmmu/qemu-system-ppc64 --enable-kvm --nographic -machine pseries > -m 8G,slots=32,maxmem=32G -device virtio-blk-pci,drive=rootdisk -drive > file=/home/bharata/F20-snap1,if=none,cache=none,id=rootdisk,format=qcow2 -vga > none -net nic,model=virtio -net user -redir tcp:2000::22 -smp 16,maxcpus=32 > -serial pty > > (qemu) migrate_set_capability x-postcopy-ram on > (qemu) migrate -d tcp:localhost:4444 > (qemu) info migrate > capabilities: xbzrle: off rdma-pin-all: off auto-converge: off zero-blocks: > off compress: off events: off x-postcopy-ram: on > Migration status: setup > total time: 0 milliseconds > > same status for around 2min...
That's interesting; I saw that behaviour on my aarch64 box, but not on my power box or on x86. Can you try using tcp:127.0.0.1:4444 to force ipv4 (that fixed it for me on aarch64). On the aarch box I found that it still happened with head of tree qemu and so decided it wasn't my postcopy world; I'm assuming what's happening is that it's trying to connect to the IPv6 address, timing out and then trying IPv4. > (qemu) info migrate > capabilities: xbzrle: off rdma-pin-all: off auto-converge: off zero-blocks: > off compress: off events: off x-postcopy-ram: on > Migration status: active > total time: 130089 milliseconds > expected downtime: 300 milliseconds > setup: 24 milliseconds > transferred ram: 79454 kbytes > throughput: 50.09 mbps > remaining ram: 7670688 kbytes > total ram: 8388864 kbytes > duplicate: 160684 pages > skipped: 0 pages > normal: 18860 pages > normal bytes: 75440 kbytes > dirty sync count: 1 > > (qemu) migrate_start_postcopy > > (qemu) info migrate > capabilities: xbzrle: off rdma-pin-all: off auto-converge: off zero-blocks: > off compress: off events: off x-postcopy-ram: on > Migration status: postcopy-active > total time: 135627 milliseconds > expected downtime: 43 milliseconds > setup: 24 milliseconds > transferred ram: 338598 kbytes > throughput: 74.02 mbps > remaining ram: 1688384 kbytes > total ram: 8388864 kbytes > duplicate: 1600406 pages > skipped: 0 pages > normal: 75258 pages > normal bytes: 301032 kbytes > dirty sync count: 0 > dirty pages rate: 98 pages > > (qemu) info migrate > capabilities: xbzrle: off rdma-pin-all: off auto-converge: off zero-blocks: > off compress: off events: off x-postcopy-ram: on > Migration status: completed > total time: 136898 milliseconds > downtime: 685 milliseconds > setup: 24 milliseconds > transferred ram: 1194196 kbytes > throughput: 72.00 mbps > remaining ram: 0 kbytes > total ram: 8388864 kbytes > duplicate: 1810921 pages > skipped: 0 pages > normal: 286839 pages > normal bytes: 1147356 kbytes > dirty sync count: 2 Great; is the guest happy? Dave > -- Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK
