We create the variable while we are at migration and we remove it after migration.
Signed-off-by: Juan Quintela <quint...@redhat.com> --- migration/ram.c | 52 ++++++++++++++++++++++++++++++++-------------------- 1 file changed, 32 insertions(+), 20 deletions(-) diff --git a/migration/ram.c b/migration/ram.c index 6c48219..1164f14 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -199,7 +199,7 @@ struct RAMState { }; typedef struct RAMState RAMState; -static RAMState ram_state; +static RAMState *ram_state; MigrationStats ram_counters; @@ -783,7 +783,7 @@ static int ram_save_page(RAMState *rs, PageSearchStatus *pss, bool last_stage) static int do_compress_ram_page(QEMUFile *f, RAMBlock *block, ram_addr_t offset) { - RAMState *rs = &ram_state; + RAMState *rs = ram_state; int bytes_sent, blen; uint8_t *p = block->host + (offset & TARGET_PAGE_MASK); @@ -1130,7 +1130,7 @@ static void migration_page_queue_free(RAMState *rs) int ram_save_queue_pages(const char *rbname, ram_addr_t start, ram_addr_t len) { RAMBlock *ramblock; - RAMState *rs = &ram_state; + RAMState *rs = ram_state; ram_counters.postcopy_requests++; rcu_read_lock(); @@ -1351,7 +1351,7 @@ void free_xbzrle_decoded_buf(void) static void ram_migration_cleanup(void *opaque) { - RAMState *rs = opaque; + RAMState **rsp = opaque; RAMBlock *block; /* caller have hold iothread lock or is in a bh, so there is @@ -1378,7 +1378,9 @@ static void ram_migration_cleanup(void *opaque) XBZRLE.zero_target_page = NULL; } XBZRLE_cache_unlock(); - migration_page_queue_free(rs); + migration_page_queue_free(*rsp); + g_free(*rsp); + *rsp = NULL; } static void ram_state_reset(RAMState *rs) @@ -1703,7 +1705,7 @@ static int postcopy_chunk_hostpages(MigrationState *ms, RAMBlock *block) */ int ram_postcopy_send_discard_bitmap(MigrationState *ms) { - RAMState *rs = &ram_state; + RAMState *rs = ram_state; RAMBlock *block; int ret; @@ -1786,12 +1788,13 @@ err: return ret; } -static int ram_state_init(RAMState *rs) +static int ram_state_init(RAMState **rsp) { - memset(rs, 0, sizeof(*rs)); - qemu_mutex_init(&rs->bitmap_mutex); - qemu_mutex_init(&rs->src_page_req_mutex); - QSIMPLEQ_INIT(&rs->src_page_requests); + *rsp = g_new0(RAMState, 1); + + qemu_mutex_init(&(*rsp)->bitmap_mutex); + qemu_mutex_init(&(*rsp)->src_page_req_mutex); + QSIMPLEQ_INIT(&(*rsp)->src_page_requests); if (migrate_use_xbzrle()) { XBZRLE_cache_lock(); @@ -1802,6 +1805,8 @@ static int ram_state_init(RAMState *rs) if (!XBZRLE.cache) { XBZRLE_cache_unlock(); error_report("Error creating cache"); + g_free(*rsp); + *rsp = NULL; return -1; } XBZRLE_cache_unlock(); @@ -1810,6 +1815,8 @@ static int ram_state_init(RAMState *rs) XBZRLE.encoded_buf = g_try_malloc0(TARGET_PAGE_SIZE); if (!XBZRLE.encoded_buf) { error_report("Error allocating encoded_buf"); + g_free(*rsp); + *rsp = NULL; return -1; } @@ -1818,6 +1825,8 @@ static int ram_state_init(RAMState *rs) error_report("Error allocating current_buf"); g_free(XBZRLE.encoded_buf); XBZRLE.encoded_buf = NULL; + g_free(*rsp); + *rsp = NULL; return -1; } } @@ -1827,7 +1836,7 @@ static int ram_state_init(RAMState *rs) qemu_mutex_lock_ramlist(); rcu_read_lock(); - ram_state_reset(rs); + ram_state_reset(*rsp); /* Skip setting bitmap if there is no RAM */ if (ram_bytes_total()) { @@ -1852,7 +1861,7 @@ static int ram_state_init(RAMState *rs) ram_counters.remaining_pages = ram_bytes_total() >> TARGET_PAGE_BITS; memory_global_dirty_log_start(); - migration_bitmap_sync(rs); + migration_bitmap_sync(*rsp); qemu_mutex_unlock_ramlist(); qemu_mutex_unlock_iothread(); rcu_read_unlock(); @@ -1877,16 +1886,16 @@ static int ram_state_init(RAMState *rs) */ static int ram_save_setup(QEMUFile *f, void *opaque) { - RAMState *rs = opaque; + RAMState **rsp = opaque; RAMBlock *block; /* migration has already setup the bitmap, reuse it. */ if (!migration_in_colo_state()) { - if (ram_state_init(rs) < 0) { + if (ram_state_init(rsp) != 0) { return -1; - } + } } - rs->f = f; + (*rsp)->f = f; rcu_read_lock(); @@ -1921,7 +1930,8 @@ static int ram_save_setup(QEMUFile *f, void *opaque) */ static int ram_save_iterate(QEMUFile *f, void *opaque) { - RAMState *rs = opaque; + RAMState **temp = opaque; + RAMState *rs = *temp; int ret; int i; int64_t t0; @@ -1996,7 +2006,8 @@ static int ram_save_iterate(QEMUFile *f, void *opaque) */ static int ram_save_complete(QEMUFile *f, void *opaque) { - RAMState *rs = opaque; + RAMState **temp = opaque; + RAMState *rs = *temp; rcu_read_lock(); @@ -2033,7 +2044,8 @@ static void ram_save_pending(QEMUFile *f, void *opaque, uint64_t max_size, uint64_t *non_postcopiable_pending, uint64_t *postcopiable_pending) { - RAMState *rs = opaque; + RAMState **temp = opaque; + RAMState *rs = *temp; uint64_t remaining_size; remaining_size = ram_counters.remaining_pages * TARGET_PAGE_SIZE; -- 2.9.4