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qemu/migration
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Juan Quintela 73208a336e migration: Make dirty_bytes_last_sync atomic 
As we set its value, it needs to be operated with atomics.
We rename it from remaining to better reflect its meaning.

Statistics always return the real reamaining bytes.  This was used to
store how much pages where dirty on the previous generation, so we can
calculate the expected downtime as: dirty_bytes_last_sync /
current_bandwith.

If we use the actual remaining bytes, we would see a very small value
at the end of the iteration.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

---

I am open to use ram_bytes_remaining() in its only use and be more
"optimistic" about the downtime.

Don't use __nocheck() functions.
Use stat64_get() now that it exists.
2023-04-27 16:39:54 +02:00
..
block-dirty-bitmap.c migration: Create migrate_block_bitmap_mapping() function 2023-04-27 16:37:28 +02:00
block.c migration: Move migrate_use_block_incremental() to option.c 2023-04-24 15:01:46 +02:00
block.h migration: disable auto-converge during bulk block migration 2017-09-27 11:27:14 +01:00
channel-block.c io: Add support for MSG_PEEK for socket channel 2023-02-06 19:22:56 +01:00
channel-block.h migration: introduce a QIOChannel impl for BlockDriverState VMState 2022-06-22 19:33:43 +01:00
channel.c migration: check magic value for deciding the mapping of channels 2023-02-06 19:22:57 +01:00
channel.h migration: check magic value for deciding the mapping of channels 2023-02-06 19:22:57 +01:00
colo-failover.c migration/colo: Improve an x-colo-lost-heartbeat error message 2023-02-23 14:10:17 +01:00
colo.c migration: Create migrate_checkpoint_delay() 2023-04-24 15:01:46 +02:00
dirtyrate.c *: Add missing includes of qemu/error-report.h 2023-03-22 15:06:57 +00:00
dirtyrate.h migration/dirtyrate: Refactor dirty page rate calculation 2022-07-20 12:15:08 +01:00
exec.c *: Add missing includes of qemu/error-report.h 2023-03-22 15:06:57 +00:00
exec.h migration: Export exec.c functions in its own file 2017-06-01 18:49:22 +02:00
fd.c monitor: Use getter/setter functions for cur_mon 2020-10-09 07:08:19 +02:00
fd.h migration: Fix fd protocol for incoming defer 2019-06-05 12:43:55 +02:00
global_state.c migration: Silence compiler warning in global_state_store_running() 2020-10-02 12:28:48 +01:00
meson.build migration: Create options.c 2023-04-24 15:01:46 +02:00
migration-hmp-cmds.c spice: move client_migrate_info command to ui/ 2023-04-24 15:01:46 +02:00
migration.c migration: Make dirty_bytes_last_sync atomic 2023-04-27 16:39:54 +02:00
migration.h multifd: Only flush once each full round of memory 2023-04-27 16:37:28 +02:00
multifd-zlib.c migration: Move parameters functions to option.c 2023-04-24 15:01:46 +02:00
multifd-zstd.c migration: Move parameters functions to option.c 2023-04-24 15:01:46 +02:00
multifd.c multifd: Fix the number of channels ready 2023-04-27 16:37:28 +02:00
multifd.h migration/multifd: Move load_cleanup inside incoming_state_destroy 2023-02-13 03:45:40 +01:00
options.c multifd: Only flush once each full round of memory 2023-04-27 16:37:28 +02:00
options.h multifd: Create property multifd-flush-after-each-section 2023-04-27 16:37:28 +02:00
page_cache.c migration: Fix cache_init()'s "Failed to allocate" error messages 2021-02-08 11:19:51 +00:00
page_cache.h migration: Clean up signed vs. unsigned XBZRLE cache-size 2021-02-08 11:19:51 +00:00
postcopy-ram.c migration: Allow postcopy_ram_supported_by_host() to report err 2023-04-27 10:18:25 +02:00
postcopy-ram.h migration: Allow postcopy_ram_supported_by_host() to report err 2023-04-27 10:18:25 +02:00
qemu-file.c migration: mark mixed functions that can suspend 2023-04-20 11:17:35 +02:00
qemu-file.h migration: mark mixed functions that can suspend 2023-04-20 11:17:35 +02:00
ram.c migration: Make dirty_bytes_last_sync atomic 2023-04-27 16:39:54 +02:00
ram.h migration: Make dirty_bytes_last_sync atomic 2023-04-27 16:39:54 +02:00
rdma.c migration: Create migrate_rdma_pin_all() function 2023-04-24 15:01:46 +02:00
rdma.h migration: Export rdma.c functions in its own file 2017-06-01 18:49:23 +02:00
savevm.c migration/vmstate-dump: Dump array size too as "num" 2023-04-27 10:18:25 +02:00
savevm.h migration: Rename res_{postcopy,precopy}_only 2023-02-15 20:04:30 +01:00
socket.c migration: Move migrate_use_zero_copy_send() to options.c 2023-04-24 15:01:46 +02:00
socket.h migration: Postcopy preemption preparation on channel creation 2022-07-20 12:15:08 +01:00
target.c migration: fix populate_vfio_info 2023-03-16 16:07:07 +01:00
threadinfo.c migration: Introduce interface query-migrationthreads 2023-02-06 19:22:57 +01:00
threadinfo.h migration: Introduce interface query-migrationthreads 2023-02-06 19:22:57 +01:00
tls.c migration: Create migrate_tls_hostname() function 2023-04-27 16:37:28 +02:00
tls.h migration: Add helpers to detect TLS capability 2022-07-20 12:15:08 +01:00
trace-events migration: Remove unused res_compatible 2023-02-15 20:04:30 +01:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
vmstate-types.c Move CPU softfloat unions to cpu-float.h 2022-04-06 14:31:43 +02:00
vmstate.c migration: Add canary to VMSTATE_END_OF_LIST 2023-02-06 19:22:56 +01:00
xbzrle.c migration/xbzrle: fix out-of-bounds write with axv512 2023-03-16 16:07:07 +01:00
xbzrle.h AVX512 support for xbzrle_encode_buffer 2023-02-11 16:51:09 +01:00
yank_functions.c migration: Move the yank unregister of channel_close out 2021-07-26 12:45:03 +01:00
yank_functions.h migration: Move the yank unregister of channel_close out 2021-07-26 12:45:03 +01:00