On 10/29/2012 9:21 AM, Vinod, Chegu wrote:
Date: Mon, 29 Oct 2012 15:11:25 +0100
From: Juan Quintela <quint...@redhat.com>
To: qemu-devel@nongnu.org
Cc: owass...@redhat.com, mtosa...@redhat.com, a...@redhat.com,
pbonz...@redhat.com
Subject: [Qemu-devel] [PATCH 00/18] Migration thread lite (20121029)
Hi
After discussing with Anthony and Paolo, this is the minimal migration thread
support that we can do for 1.3.
- fixed all the comments (thanks eric, paolo and orit).
- buffered_file.c remains until 1.4.
- testing for vinod showed very nice results, that is why the bitmap
handling optimizations remain.
Hi Juan,
Is there any value in calling the migration_bitmap_synch() routine in
the ram_save_setup() . All the
pages were marked as dirty to begin with...so can't we just assume that
all pages need to be sent
and proceed ?
migration_bitmap_synch () - still remains an expensive call. and the
very first call to seems to be ~3x times
more expensive than the subsequent calls. For large guests (>128G
guests) this is multiple seconds...and
it freezes the OS instance.
Thanks
Vinod
Note: Writes has become blocking, and I have to change the "remove"
the feature now in qemu-sockets.c. Checked that migration was the only user of
that feature. If new users appear, they just need to add the
socket_set_nonblock() by hand.
Please, review.
Thanks, Juan.
The following changes since commit 50cd72148211c5e5f22ea2519d19ce024226e61f:
hw/xtensa_sim: get rid of intermediate xtensa_sim_init (2012-10-27 15:04:00
+0000)
are available in the git repository at:
http://repo.or.cz/r/qemu/quintela.git migration-thread-20121029
for you to fetch changes up to 2c74654f19efc7db35117a87c0d9db4776931e1b:
ram: optimize migration bitmap walking (2012-10-29 14:14:28 +0100)
Juan Quintela (15):
buffered_file: Move from using a timer to use a thread
migration: make qemu_fopen_ops_buffered() return void
migration: stop all cpus correctly
migration: make writes blocking
migration: remove unfreeze logic
migration: take finer locking
buffered_file: Unfold the trick to restart generating migration data
buffered_file: don't flush on put buffer
buffered_file: unfold buffered_append in buffered_put_buffer
savevm: New save live migration method: pending
migration: include qemu-file.h
migration-fd: remove duplicate include
memory: introduce memory_region_test_and_clear_dirty
ram: Use memory_region_test_and_clear_dirty
ram: optimize migration bitmap walking
Paolo Bonzini (1):
split MRU ram list
Umesh Deshpande (2):
add a version number to ram_list
protect the ramlist with a separate mutex
arch_init.c | 115 ++++++++++++++++++++++++-----------------------
block-migration.c | 49 +++++---------------
buffered_file.c | 130 +++++++++++++++++++++++++-----------------------------
buffered_file.h | 2 +-
cpu-all.h | 15 ++++++-
exec.c | 44 +++++++++++++++---
memory.c | 16 +++++++
memory.h | 18 ++++++++
migration-exec.c | 3 +-
migration-fd.c | 4 +-
migration-tcp.c | 2 +-
migration-unix.c | 2 +-
migration.c | 100 ++++++++++++++++-------------------------
migration.h | 4 +-
qemu-file.h | 5 ---
qemu-sockets.c | 4 --
savevm.c | 24 +++++++---
sysemu.h | 1 +
vmstate.h | 1 +
19 files changed, 280 insertions(+), 259 deletions(-)
--
1.7.11.7
.
