diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2016-02-15 19:57:57 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-02-16 15:34:43 +0100 |
| commit | 4987783400667147ada01a5bdcce53f11b822888 (patch) | |
| tree | 5c52e9b632ac7e379e402dee41bbd62438a8e4d9 /migration/ram.c | |
| parent | 98799b0d4be4fb5e3962005448119133a6bf74b2 (diff) | |
migration: fix incorrect memory_global_dirty_log_start outside BQL
This can cause various segmentation faults or aborts in qemu-iotests
test 091.
Fixes: 5b82b703b69acc67b78b98a5efc897a3912719eb
Cc: Dave Gilbert <dgilbert@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'migration/ram.c')
| -rw-r--r-- | migration/ram.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/migration/ram.c b/migration/ram.c index 96c749face..704f6a95bf 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -1920,6 +1920,9 @@ static int ram_save_setup(QEMUFile *f, void *opaque) acct_clear(); } + /* For memory_global_dirty_log_start below. */ + qemu_mutex_lock_iothread(); + qemu_mutex_lock_ramlist(); rcu_read_lock(); bytes_transferred = 0; @@ -1944,6 +1947,7 @@ static int ram_save_setup(QEMUFile *f, void *opaque) memory_global_dirty_log_start(); migration_bitmap_sync(); qemu_mutex_unlock_ramlist(); + qemu_mutex_unlock_iothread(); qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE); |