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migration: disable RDMA WRITE after postcopy started

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RDMA WRITE operations are performed with no notification to the destination
qemu, then the destination qemu can not wakeup. This patch disable RDMA WRITE
after postcopy started.

Signed-off-by: Lidong Chen <lidongchen@tencent.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Lidong Chen 2018-08-06 21:29:27 +08:00 committed by Juan Quintela
parent 4cbc9c7ffd
commit ccb7e1b5a6
2 changed files with 18 additions and 2 deletions
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8
migration/qemu-file.c
View file

@ -253,8 +253,12 @@ size_t ram_control_save_page(QEMUFile *f, ram_addr_t block_offset,
if (f->hooks && f->hooks->save_page) {
int ret = f->hooks->save_page(f, f->opaque, block_offset,
offset, size, bytes_sent);
f->bytes_xfer += size;
if (ret != RAM_SAVE_CONTROL_DELAYED) {
if (ret != RAM_SAVE_CONTROL_NOT_SUPP) {
f->bytes_xfer += size;
}
if (ret != RAM_SAVE_CONTROL_DELAYED &&
ret != RAM_SAVE_CONTROL_NOT_SUPP) {
if (bytes_sent && *bytes_sent > 0) {
qemu_update_position(f, *bytes_sent);
} else if (ret < 0) {

12
migration/rdma.c
View file

@ -2921,6 +2921,10 @@ static size_t qemu_rdma_save_page(QEMUFile *f, void *opaque,
CHECK_ERROR_STATE();
if (migrate_get_current()->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) {
return RAM_SAVE_CONTROL_NOT_SUPP;
}
qemu_fflush(f);
if (size > 0) {
@ -3480,6 +3484,10 @@ static int qemu_rdma_registration_start(QEMUFile *f, void *opaque,
CHECK_ERROR_STATE();
if (migrate_get_current()->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) {
return 0;
}
trace_qemu_rdma_registration_start(flags);
qemu_put_be64(f, RAM_SAVE_FLAG_HOOK);
qemu_fflush(f);
@ -3502,6 +3510,10 @@ static int qemu_rdma_registration_stop(QEMUFile *f, void *opaque,
CHECK_ERROR_STATE();
if (migrate_get_current()->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) {
return 0;
}
qemu_fflush(f);
ret = qemu_rdma_drain_cq(f, rdma);