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Re: [Qemu-devel] [PATCH v9 00/56] Postcopy implementation
From: |
Bharata B Rao |
Subject: |
Re: [Qemu-devel] [PATCH v9 00/56] Postcopy implementation |
Date: |
Fri, 6 Nov 2015 09:18:47 +0530 |
User-agent: |
Mutt/1.5.23 (2014-03-12) |
On Thu, Nov 05, 2015 at 06:10:27PM +0000, Dr. David Alan Gilbert (git) wrote:
> From: "Dr. David Alan Gilbert" <address@hidden>
>
> This is the 9th cut of my version of postcopy.
>
> The userfaultfd linux kernel code is now in the upstream kernel
> tree, and so 4.3 can be used without modification.
>
> This qemu series can be found at:
> https://github.com/orbitfp7/qemu.git
> on the wp3-postcopy-v9 tag
>
> Testing status:
> * Tested heavily on x86
> * Smoke tested on aarch64 (so it does work on different page sizes)
Tested minimally on ppc64 with back and forth postcopy migration of
unloaded pseries guest within the localhost - works as expected.
However I am seeing a failure in one case. I am not sure if this is
a user error or a real issue in postcopy migration. If I switch to postcopy
migration immediately after starting the migration, I see the migration
failing with error:
qemu-system-ppc64: qemu_savevm_send_packaged: Unreasonably large packaged
state: 25905005
1. (qemu) migrate_set_capability x-postcopy-ram on
2. (qemu) migrate -d tcp:localhost:4444
3. (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: 4177 milliseconds
expected downtime: 300 milliseconds
setup: 75 milliseconds
transferred ram: 115523 kbytes
throughput: 155.69 mbps
remaining ram: 30117196 kbytes
total ram: 33554688 kbytes
duplicate: 835311 pages
skipped: 0 pages
normal: 24061 pages
normal bytes: 96244 kbytes
dirty sync count: 1
4. (qemu) migrate_start_postcopy
5. (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: failed
total time: 0 milliseconds
If I run 'info migrate' in step 3 a few more times before step 4, then
the migration succeeds. So is there a way to figure out when to switch
over to postcopy migration ?
QEMU cmdline: ./ppc64-softmmu/qemu-system-ppc64 --enable-kvm --nographic -vga
none -machine pseries -m 32G,slots=32,maxmem=64G -smp 16 -device
virtio-blk-pci,drive=rootdisk -drive
file=/home/bharata/F20-snap1,if=none,cache=none,id=rootdisk,format=qcow2
-monitor telnet:127.0.0.1:1234,server,nowait
Host: 4.3.0-rc7+
Regards,
Bharata.
- [Qemu-devel] [PATCH v9 48/56] Host page!=target page: Cleanup bitmaps, (continued)
- [Qemu-devel] [PATCH v9 48/56] Host page!=target page: Cleanup bitmaps, Dr. David Alan Gilbert (git), 2015/11/05
- [Qemu-devel] [PATCH v9 49/56] Round up RAMBlock sizes to host page sizes, Dr. David Alan Gilbert (git), 2015/11/05
- [Qemu-devel] [PATCH v9 50/56] Postcopy; Handle userfault requests, Dr. David Alan Gilbert (git), 2015/11/05
- [Qemu-devel] [PATCH v9 51/56] Start up a postcopy/listener thread ready for incoming page data, Dr. David Alan Gilbert (git), 2015/11/05
- [Qemu-devel] [PATCH v9 52/56] postcopy: Wire up loadvm_postcopy_handle_ commands, Dr. David Alan Gilbert (git), 2015/11/05
- [Qemu-devel] [PATCH v9 53/56] Postcopy: Mark nohugepage before discard, Dr. David Alan Gilbert (git), 2015/11/05
- [Qemu-devel] [PATCH v9 54/56] End of migration for postcopy, Dr. David Alan Gilbert (git), 2015/11/05
- [Qemu-devel] [PATCH v9 55/56] Disable mlock around incoming postcopy, Dr. David Alan Gilbert (git), 2015/11/05
- [Qemu-devel] [PATCH v9 56/56] Inhibit ballooning during postcopy, Dr. David Alan Gilbert (git), 2015/11/05
- Re: [Qemu-devel] [PATCH v9 00/56] Postcopy implementation,
Bharata B Rao <=
- Re: [Qemu-devel] [PATCH v9 00/56] Postcopy implementation, Dr. David Alan Gilbert, 2015/11/06
- Re: [Qemu-devel] [PATCH v9 00/56] Postcopy implementation, Bharata B Rao, 2015/11/06
- Re: [Qemu-devel] [PATCH v9 00/56] Postcopy implementation, Dr. David Alan Gilbert, 2015/11/06
- Re: [Qemu-devel] [PATCH v9 00/56] Postcopy implementation, Dr. David Alan Gilbert, 2015/11/06
- Re: [Qemu-devel] [PATCH v9 00/56] Postcopy implementation, Bharata B Rao, 2015/11/06
- Re: [Qemu-devel] [PATCH v9 00/56] Postcopy implementation, Dr. David Alan Gilbert, 2015/11/06
- Re: [Qemu-devel] [PATCH v9 00/56] Postcopy implementation, Bharata B Rao, 2015/11/08
- Re: [Qemu-devel] [PATCH v9 00/56] Postcopy implementation, Dr. David Alan Gilbert, 2015/11/09
- Re: [Qemu-devel] [PATCH v9 00/56] Postcopy implementation, Bharata B Rao, 2015/11/09
- Re: [Qemu-devel] [PATCH v9 00/56] Postcopy implementation, Dr. David Alan Gilbert, 2015/11/09