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migration: Non multifd migration don't care about multifd flushes

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RDMA was having trouble because
migrate_multifd_flush_after_each_section() can only be true or false,
but we don't want to send any flush when we are not in multifd
migration.

CC: Fabiano Rosas <farosas@suse.de
Fixes: 294e5a4034 ("multifd: Only flush once each full round of memory")

Reported-by: Li Zhijian <lizhijian@fujitsu.com>
Reviewed-by: Li Zhijian <lizhijian@fujitsu.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-ID: <20231011205548.10571-2-quintela@redhat.com>
(cherry picked from commit d4f34485ca)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This commit is contained in:
Juan Quintela 2023-10-11 22:55:48 +02:00 committed by Michael Tokarev
parent 9285589334
commit 95b3854bf7
1 changed files with 9 additions and 6 deletions
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15
migration/ram.c
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@ -1399,7 +1399,8 @@ static int find_dirty_block(RAMState *rs, PageSearchStatus *pss)
pss->page = 0;
pss->block = QLIST_NEXT_RCU(pss->block, next);
if (!pss->block) {
if (!migrate_multifd_flush_after_each_section()) {
if (migrate_multifd() &&
!migrate_multifd_flush_after_each_section()) {
QEMUFile *f = rs->pss[RAM_CHANNEL_PRECOPY].pss_channel;
int ret = multifd_send_sync_main(f);
if (ret < 0) {
@ -3076,7 +3077,7 @@ static int ram_save_setup(QEMUFile *f, void *opaque)
return ret;
}
if (!migrate_multifd_flush_after_each_section()) {
if (migrate_multifd() && !migrate_multifd_flush_after_each_section()) {
qemu_put_be64(f, RAM_SAVE_FLAG_MULTIFD_FLUSH);
}
@ -3188,7 +3189,7 @@ static int ram_save_iterate(QEMUFile *f, void *opaque)
out:
if (ret >= 0
&& migration_is_setup_or_active(migrate_get_current()->state)) {
if (migrate_multifd_flush_after_each_section()) {
if (migrate_multifd() && migrate_multifd_flush_after_each_section()) {
ret = multifd_send_sync_main(rs->pss[RAM_CHANNEL_PRECOPY].pss_channel);
if (ret < 0) {
return ret;
@ -3265,7 +3266,7 @@ static int ram_save_complete(QEMUFile *f, void *opaque)
return ret;
}
if (!migrate_multifd_flush_after_each_section()) {
if (migrate_multifd() && !migrate_multifd_flush_after_each_section()) {
qemu_put_be64(f, RAM_SAVE_FLAG_MULTIFD_FLUSH);
}
qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
@ -3774,7 +3775,8 @@ int ram_load_postcopy(QEMUFile *f, int channel)
break;
case RAM_SAVE_FLAG_EOS:
/* normal exit */
if (migrate_multifd_flush_after_each_section()) {
if (migrate_multifd() &&
migrate_multifd_flush_after_each_section()) {
multifd_recv_sync_main();
}
break;
@ -4052,7 +4054,8 @@ static int ram_load_precopy(QEMUFile *f)
break;
case RAM_SAVE_FLAG_EOS:
/* normal exit */
if (migrate_multifd_flush_after_each_section()) {
if (migrate_multifd() &&
migrate_multifd_flush_after_each_section()) {
multifd_recv_sync_main();
}
break;