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[PULL,07/28] migration: force QEMUFile to blocking mode for outgoing migration

Message ID 9e4d2b98ee98f4cee50d671e500eceeefa751ee0.1464242913.git.amit.shah@redhat.com
State New
Headers show

Commit Message

Amit Shah May 26, 2016, 6:11 a.m. UTC 
From: "Daniel P. Berrange" <berrange@redhat.com>

Instead of relying on the default QEMUFile I/O blocking flag
state, explicitly turn on blocking I/O for outgoing migration
since it takes place in a background thread.

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Message-Id: <1461751518-12128-8-git-send-email-berrange@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
---
 migration/migration.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/migration/migration.c b/migration/migration.c
index ac7790f..c8d10ee 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -1791,6 +1791,7 @@  void migrate_fd_connect(MigrationState *s)
     s->expected_downtime = max_downtime/1000000;
     s->cleanup_bh = qemu_bh_new(migrate_fd_cleanup, s);
 
+    qemu_file_set_blocking(s->to_dst_file, true);
     qemu_file_set_rate_limit(s->to_dst_file,
                              s->bandwidth_limit / XFER_LIMIT_RATIO);