Hi
Hi
This is just v3 rebased, with review-by, and the small changes suggested.
I added the removal of hotmplug because they are already reviewed.
I plan to send this as migration/next for when 2.0 open.
- put all reviews
- rebase
- small changes on compression-switch
- add all the hotplug removal comments/typos/fixes
Please, comment.
Thanks, Juan.
[v3]
Contination of the previous series, addressed comments from Peter and Dave.
- All docs suggestions changed
- rename flush_page_queue to migration_page_queue()
- rebase on top of latest
- move the compression-switch logic
- change parameters to page_abs everywhere (notice that we end dropping them)
[v2]
Continuation of previous series, all review comments addressed. New things:
- Consolidate all function comments in the same style (yes, docs)
- Be much more careful with maintaining comments correct
- Move all postcopy fields to RAMState
- Move QEMUFile to RAMState
- rename qemu_target_page_bits() to qemu_target_page_size() to reflect use
- Remove MigrationState from functions that don't need it
- reorganize last_sent_block to the place where it is used/needed
- Move several places from offsets to pages
- Rename last_ram_offset() to last_ram_page() to refect use
Please comment.
[v1]
Currently, we have several places where we store informaticon about
ram for migration pruposes:
- global variables on migration/ram.c
- inside the accounting_info struct in migration/ram.c
notice that not all the accounting vars are inside there
- some stuff is in MigrationState, althought it belongs to migrate/ram.c
So, this series does:
- move everything related to ram.c to RAMState struct
- make all the statistics consistent, exporting them with an accessor
function
Why now?
Because I am trying to do some more optimizations about how we send
data around and it is basically impossible to do with current code, we
still need to add more variables. Notice that there are things like that:
- accounting info was only reset if we had xbzrle enabled
- How/where to initialize variables are completely inconsistent.
To Do:
- There are still places that access directly the global struct.
Mainly postcopy. We could finfd a way to make a pointer to the
current migration. If people like the approach, I will search where
to put it.
- I haven't posted any real change here, this is just the move of
variables to the struct and pass the struct around. Optimizations
will came after.
- Consolidate XBZRLE, Compression params, etc in its own structs
(inside or not RAMState, to be able to allocate ones, others, or
...)
[v2 no-hotplug]
This updates patches with all the comments received.
I move qdev_unplug() to make linux-user compile.
Please, review.
[RFC - v1 no-hotplug]
This series disable hotplug/unplug during migration. Thank to Markus
for explaining where I had to put the checks. Why? Because during
migration we will fail if there are changes. For instance, in
postcopy, if we add a memory region, we would failing. Same for other
devices if they are not setup exactly the same on destination.
Iidea would be to disable it, andthen enable for the thing that we know that work.
This series are on top of my previous RAMState v2 serie.
Commets, please?
Thanks, Juan.
Comments, please.
Chao Fan (1):
ram: Add page-size to output in 'info migrate'
Juan Quintela (58):
ram: Update all functions comments
ram: Rename flush_page_queue() to migration_page_queue_free()
ram: Rename block_name to rbname
ram: Create RAMState
ram: Add dirty_rate_high_cnt to RAMState
ram: Move bitmap_sync_count into RAMState
ram: Move start time into RAMState
ram: Move bytes_xfer_prev into RAMState
ram: Change byte_xfer_{prev,now} type to uint64_t
ram: Move num_dirty_pages_period into RAMState
ram: Change num_dirty_pages_period type to uint64_t
ram: Move xbzrle_cache_miss_prev into RAMState
ram: Move iterations_prev into RAMState
ram: Move dup_pages into RAMState
ram: Remove unused dup_mig_bytes_transferred()
ram: Remove unused pages_skipped variable
ram: Move norm_pages to RAMState
ram: Remove norm_mig_bytes_transferred
ram: Move iterations into RAMState
ram: Move xbzrle_bytes into RAMState
ram: Move xbzrle_pages into RAMState
ram: Move xbzrle_cache_miss into RAMState
ram: Move xbzrle_cache_miss_rate into RAMState
ram: Move xbzrle_overflows into RAMState
ram: Move migration_dirty_pages to RAMState
ram: Everything was init to zero, so use memset
ram: Move migration_bitmap_mutex into RAMState
ram: Move migration_bitmap_rcu into RAMState
ram: Move bytes_transferred into RAMState
ram: Use the RAMState bytes_transferred parameter
ram: Remove ram_save_remaining
ram: Move last_req_rb to RAMState
ram: Move src_page_req* to RAMState
ram: Create ram_dirty_sync_count()
ram: Remove dirty_bytes_rate
ram: Move dirty_pages_rate to RAMState
ram: Move postcopy_requests into RAMState
ram: Add QEMUFile to RAMState
ram: Move QEMUFile into RAMState
ram: Remove compression_switch and inline its logic
migration: Remove MigrationState from migration_in_postcopy
ram: We don't need MigrationState parameter anymore
ram: Rename qemu_target_page_bits() to qemu_target_page_size()
ram: Pass RAMBlock to bitmap_sync
ram: ram_discard_range() don't use the mis parameter
ram: reorganize last_sent_block
ram: Use page number instead of an address for the bitmap operations
ram: Remember last_page instead of last_offset
ram: Change offset field in PageSearchStatus to page
ram: Use ramblock and page offset instead of absolute offset
ram: rename last_ram_offset() last_ram_pages()
ram: Use RAMBitmap type for coherence
migration: Remove MigrationState parameter from migration_is_idle()
qdev: qdev_hotplug is really a bool
qdev: Export qdev_hot_removed
qdev: Move qdev_unplug() to qdev-monitor.c
migration: Disable hotplug/unplug during migration
ram: Remove migration_bitmap_extend()
exec.c | 11 +-
hmp.c | 3 +
hw/core/qdev.c | 40 +-
include/exec/ram_addr.h | 8 +-
include/hw/qdev-core.h | 3 +-
include/migration/migration.h | 41 +-
include/sysemu/sysemu.h | 2 +-
migration/migration.c | 44 +-
migration/postcopy-ram.c | 14 +-
migration/ram.c | 1210 +++++++++++++++++++++--------------------
migration/savevm.c | 15 +-
migration/trace-events | 4 +-
qapi-schema.json | 5 +-
qdev-monitor.c | 45 ++
14 files changed, 741 insertions(+), 704 deletions(-)
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2.9.3