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d59c40cc48
qemu/migration
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Leonardo Bras d59c40cc48 migration/multifd: Report to user when zerocopy not working 
Some errors, like the lack of Scatter-Gather support by the network
interface(NETIF_F_SG) may cause sendmsg(...,MSG_ZEROCOPY) to fail on using
zero-copy, which causes it to fall back to the default copying mechanism.

After each full dirty-bitmap scan there should be a zero-copy flush
happening, which checks for errors each of the previous calls to
sendmsg(...,MSG_ZEROCOPY). If all of them failed to use zero-copy, then
increment dirty_sync_missed_zero_copy migration stat to let the user know
about it.

Signed-off-by: Leonardo Bras <leobras@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Acked-by: Peter Xu <peterx@redhat.com>
Message-Id: <20220711211112.18951-4-leobras@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2022-07-20 12:15:09 +01:00
..
block-dirty-bitmap.c migration: block-dirty-bitmap: add missing qemu_mutex_lock_iothread 2021-10-05 13:10:29 +02:00
block.c block: Change blk_{pread,pwrite}() param order 2022-07-12 12:14:56 +02:00
block.h migration: disable auto-converge during bulk block migration 2017-09-27 11:27:14 +01:00
channel-block.c migration: introduce a QIOChannel impl for BlockDriverState VMState 2022-06-22 19:33:43 +01:00
channel-block.h migration: introduce a QIOChannel impl for BlockDriverState VMState 2022-06-22 19:33:43 +01:00
channel.c migration: Add helpers to detect TLS capability 2022-07-20 12:15:08 +01:00
channel.h migration: Route errors down through migration_channel_connect 2018-02-06 10:55:12 +00:00
colo-failover.c qemu/atomic.h: rename atomic_ to qatomic_ 2020-09-23 16:07:44 +01:00
colo.c migration: remove the QEMUFileOps abstraction 2022-06-23 10:18:13 +01:00
dirtyrate.c migration/dirtyrate: Refactor dirty page rate calculation 2022-07-20 12:15:08 +01:00
dirtyrate.h migration/dirtyrate: Refactor dirty page rate calculation 2022-07-20 12:15:08 +01:00
exec.c migration: unify incoming processing 2018-07-10 12:48:53 +01:00
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: remove the QEMUFileOps abstraction 2022-06-23 10:18:13 +01:00
migration.c Add dirty-sync-missed-zero-copy migration stat 2022-07-20 12:15:09 +01:00
migration.h migration: Add property x-postcopy-preempt-break-huge 2022-07-20 12:15:08 +01:00
multifd-zlib.c multifd: Copy pages before compressing them with zlib 2022-07-20 12:15:08 +01:00
multifd-zstd.c multifd: recv side only needs the RAMBlock host address 2022-01-28 15:38:23 +01:00
multifd.c migration/multifd: Report to user when zerocopy not working 2022-07-20 12:15:09 +01:00
multifd.h multifd: Implement zero copy write in multifd migration (multifd-zero-copy) 2022-05-16 13:56:24 +01:00
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: Enable TLS for preempt channel 2022-07-20 12:15:09 +01:00
postcopy-ram.h migration: Create the postcopy preempt channel asynchronously 2022-07-20 12:15:08 +01:00
qemu-file.c migration: remove unreachable code after reading data 2022-07-20 12:15:09 +01:00
qemu-file.h migration: Postcopy recover with preempt enabled 2022-07-20 12:15:08 +01:00
ram.c migration/multifd: Report to user when zerocopy not working 2022-07-20 12:15:09 +01:00
ram.h migration/multifd: Report to user when zerocopy not working 2022-07-20 12:15:09 +01:00
rdma.c migration: remove the QEMUFileOps abstraction 2022-06-23 10:18:13 +01:00
rdma.h migration: Export rdma.c functions in its own file 2017-06-01 18:49:23 +02:00
savevm.c migration: Postcopy recover with preempt enabled 2022-07-20 12:15:08 +01:00
savevm.h migration: Add blocker information 2021-02-08 11:19:51 +00:00
socket.c migration: Postcopy preemption preparation on channel creation 2022-07-20 12:15:08 +01:00
socket.h migration: Postcopy preemption preparation on channel creation 2022-07-20 12:15:08 +01:00
target.c migration: Move populate_vfio_info() into a separate file 2021-05-14 12:31:51 +02:00
tls.c migration: Add helpers to detect TLS capability 2022-07-20 12:15:08 +01:00
tls.h migration: Add helpers to detect TLS capability 2022-07-20 12:15:08 +01:00
trace-events migration: Enable TLS for preempt channel 2022-07-20 12:15:09 +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: rename qemu_ftell to qemu_file_total_transferred 2022-06-22 19:33:36 +01:00
xbzrle.c migration: Create migration/xbzrle.h 2017-05-18 18:04:54 +02:00
xbzrle.h migration: Create migration/xbzrle.h 2017-05-18 18:04:54 +02:00
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