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multifd: Fix flush of zero copy page send request

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Make IO channel flush call after the inflight request has been drained
in multifd thread, or else we may missed to flush the inflight request.

Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Zhenzhong Duan 2022-10-17 15:53:51 +08:00 committed by Juan Quintela
parent ddbe628c97
commit ebfc578715
4 changed files with 1291 additions and 4 deletions
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7
configs/devices/x86_64-softmmu/x86_64-quintela-devices.mak Normal file
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@ -0,0 +1,7 @@
# Boards:
#
CONFIG_ISAPC=n
CONFIG_I440FX=n
CONFIG_Q35=n
CONFIG_MICROVM=y

6
configs/devices/x86_64-softmmu/x86_64-quintela2-devices.mak Normal file
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@ -0,0 +1,6 @@
# Boards:
#
CONFIG_ISAPC=y
CONFIG_I440FX=y
CONFIG_Q35=y
CONFIG_MICROVM=y

8
migration/multifd.c
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@ -630,16 +630,16 @@ int multifd_send_sync_main(QEMUFile *f)
stat64_add(&ram_atomic_counters.transferred, p->packet_len);
qemu_mutex_unlock(&p->mutex);
qemu_sem_post(&p->sem);
if (flush_zero_copy && p->c && (multifd_zero_copy_flush(p->c) < 0)) {
return -1;
}
}
for (i = 0; i < migrate_multifd_channels(); i++) {
MultiFDSendParams *p = &multifd_send_state->params[i];
trace_multifd_send_sync_main_wait(p->id);
qemu_sem_wait(&p->sem_sync);
if (flush_zero_copy && p->c && (multifd_zero_copy_flush(p->c) < 0)) {
return -1;
}
}
trace_multifd_send_sync_main(multifd_send_state->packet_num);

1274
migration/multifd.c.orig Normal file
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