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migration/next for 20170607

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Merge remote-tracking branch 'remotes/juanquintela/tags/migration/20170607' into staging

migration/next for 20170607

# gpg: Signature made Wed 07 Jun 2017 10:02:01 BST
# gpg:                using RSA key 0xF487EF185872D723
# gpg: Good signature from "Juan Quintela <quintela@redhat.com>"
# gpg:                 aka "Juan Quintela <quintela@trasno.org>"
# Primary key fingerprint: 1899 FF8E DEBF 58CC EE03  4B82 F487 EF18 5872 D723

* remotes/juanquintela/tags/migration/20170607:
  qemu/migration: fix the double free problem on from_src_file
  ram: Make RAMState dynamic
  ram: Use MigrationStats for statistics
  ram: Move ZERO_TARGET_PAGE inside XBZRLE
  ram: Call migration_page_queue_free() at ram_migration_cleanup()
  ram: We only print throttling information sometimes
  ram: Unfold get_xbzrle_cache_stats() into populate_ram_info()

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2017-06-07 15:06:42 +01:00
commit b55a69fe5f
4 changed files with 114 additions and 194 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

59
migration/migration.c
View File

@ -588,40 +588,42 @@ static bool migration_is_setup_or_active(int state)
}
}
static void get_xbzrle_cache_stats(MigrationInfo *info)
{
if (migrate_use_xbzrle()) {
info->has_xbzrle_cache = true;
info->xbzrle_cache = g_malloc0(sizeof(*info->xbzrle_cache));
info->xbzrle_cache->cache_size = migrate_xbzrle_cache_size();
info->xbzrle_cache->bytes = xbzrle_mig_bytes_transferred();
info->xbzrle_cache->pages = xbzrle_mig_pages_transferred();
info->xbzrle_cache->cache_miss = xbzrle_mig_pages_cache_miss();
info->xbzrle_cache->cache_miss_rate = xbzrle_mig_cache_miss_rate();
info->xbzrle_cache->overflow = xbzrle_mig_pages_overflow();
}
}
static void populate_ram_info(MigrationInfo *info, MigrationState *s)
{
info->has_ram = true;
info->ram = g_malloc0(sizeof(*info->ram));
info->ram->transferred = ram_bytes_transferred();
info->ram->transferred = ram_counters.transferred;
info->ram->total = ram_bytes_total();
info->ram->duplicate = dup_mig_pages_transferred();
info->ram->duplicate = ram_counters.duplicate;
/* legacy value. It is not used anymore */
info->ram->skipped = 0;
info->ram->normal = norm_mig_pages_transferred();
info->ram->normal_bytes = norm_mig_pages_transferred() *
info->ram->normal = ram_counters.normal;
info->ram->normal_bytes = ram_counters.normal *
qemu_target_page_size();
info->ram->mbps = s->mbps;
info->ram->dirty_sync_count = ram_dirty_sync_count();
info->ram->postcopy_requests = ram_postcopy_requests();
info->ram->dirty_sync_count = ram_counters.dirty_sync_count;
info->ram->postcopy_requests = ram_counters.postcopy_requests;
info->ram->page_size = qemu_target_page_size();
if (migrate_use_xbzrle()) {
info->has_xbzrle_cache = true;
info->xbzrle_cache = g_malloc0(sizeof(*info->xbzrle_cache));
info->xbzrle_cache->cache_size = migrate_xbzrle_cache_size();
info->xbzrle_cache->bytes = xbzrle_counters.bytes;
info->xbzrle_cache->pages = xbzrle_counters.pages;
info->xbzrle_cache->cache_miss = xbzrle_counters.cache_miss;
info->xbzrle_cache->cache_miss_rate = xbzrle_counters.cache_miss_rate;
info->xbzrle_cache->overflow = xbzrle_counters.overflow;
}
if (cpu_throttle_active()) {
info->has_cpu_throttle_percentage = true;
info->cpu_throttle_percentage = cpu_throttle_get_percentage();
}
if (s->state != MIGRATION_STATUS_COMPLETED) {
info->ram->remaining = ram_bytes_remaining();
info->ram->dirty_pages_rate = ram_dirty_pages_rate();
info->ram->dirty_pages_rate = ram_counters.dirty_pages_rate;
}
}
@ -659,12 +661,6 @@ MigrationInfo *qmp_query_migrate(Error **errp)
info->disk->total = blk_mig_bytes_total();
}
if (cpu_throttle_active()) {
info->has_cpu_throttle_percentage = true;
info->cpu_throttle_percentage = cpu_throttle_get_percentage();
}
get_xbzrle_cache_stats(info);
break;
case MIGRATION_STATUS_POSTCOPY_ACTIVE:
/* Mostly the same as active; TODO add some postcopy stats */
@ -687,15 +683,12 @@ MigrationInfo *qmp_query_migrate(Error **errp)
info->disk->total = blk_mig_bytes_total();
}
get_xbzrle_cache_stats(info);
break;
case MIGRATION_STATUS_COLO:
info->has_status = true;
/* TODO: display COLO specific information (checkpoint info etc.) */
break;
case MIGRATION_STATUS_COMPLETED:
get_xbzrle_cache_stats(info);
info->has_status = true;
info->has_total_time = true;
info->total_time = s->total_time;
@ -955,8 +948,6 @@ static void migrate_fd_cleanup(void *opaque)
qemu_bh_delete(s->cleanup_bh);
s->cleanup_bh = NULL;
migration_page_queue_free();
if (s->to_dst_file) {
trace_migrate_fd_cleanup();
qemu_mutex_unlock_iothread();
@ -2027,8 +2018,8 @@ static void *migration_thread(void *opaque)
bandwidth, threshold_size);
/* if we haven't sent anything, we don't want to recalculate
10000 is a small enough number for our purposes */
if (ram_dirty_pages_rate() && transferred_bytes > 10000) {
s->expected_downtime = ram_dirty_pages_rate() *
if (ram_counters.dirty_pages_rate && transferred_bytes > 10000) {
s->expected_downtime = ram_counters.dirty_pages_rate *
qemu_target_page_size() / bandwidth;
}

233
migration/ram.c
View File

@ -69,13 +69,13 @@
/* 0x80 is reserved in migration.h start with 0x100 next */
#define RAM_SAVE_FLAG_COMPRESS_PAGE 0x100
static uint8_t *ZERO_TARGET_PAGE;
static inline bool is_zero_range(uint8_t *p, uint64_t size)
{
return buffer_is_zero(p, size);
}
XBZRLECacheStats xbzrle_counters;
/* struct contains XBZRLE cache and a static page
used by the compression */
static struct {
@ -86,6 +86,8 @@ static struct {
/* Cache for XBZRLE, Protected by lock. */
PageCache *cache;
QemuMutex lock;
/* it will store a page full of zeros */
uint8_t *zero_target_page;
} XBZRLE;
/* buffer used for XBZRLE decoding */
@ -177,8 +179,6 @@ struct RAMState {
bool ram_bulk_stage;
/* How many times we have dirty too many pages */
int dirty_rate_high_cnt;
/* How many times we have synchronized the bitmap */
uint64_t bitmap_sync_count;
/* these variables are used for bitmap sync */
/* last time we did a full bitmap_sync */
int64_t time_last_bitmap_sync;
@ -190,33 +190,11 @@ struct RAMState {
uint64_t xbzrle_cache_miss_prev;
/* number of iterations at the beginning of period */
uint64_t iterations_prev;
/* Accounting fields */
/* number of zero pages. It used to be pages filled by the same char. */
uint64_t zero_pages;
/* number of normal transferred pages */
uint64_t norm_pages;
/* Iterations since start */
uint64_t iterations;
/* xbzrle transmitted bytes. Notice that this is with
* compression, they can't be calculated from the pages */
uint64_t xbzrle_bytes;
/* xbzrle transmmited pages */
uint64_t xbzrle_pages;
/* xbzrle number of cache miss */
uint64_t xbzrle_cache_miss;
/* xbzrle miss rate */
double xbzrle_cache_miss_rate;
/* xbzrle number of overflows */
uint64_t xbzrle_overflows;
/* number of dirty bits in the bitmap */
uint64_t migration_dirty_pages;
/* total number of bytes transferred */
uint64_t bytes_transferred;
/* number of dirtied pages in the last second */
uint64_t dirty_pages_rate;
/* Count of requests incoming from destination */
uint64_t postcopy_requests;
/* protects modification of the bitmap */
uint64_t migration_dirty_pages;
/* number of dirty bits in the bitmap */
QemuMutex bitmap_mutex;
/* The RAMBlock used in the last src_page_requests */
RAMBlock *last_req_rb;
@ -226,67 +204,14 @@ struct RAMState {
};
typedef struct RAMState RAMState;
static RAMState ram_state;
uint64_t dup_mig_pages_transferred(void)
{
return ram_state.zero_pages;
}
uint64_t norm_mig_pages_transferred(void)
{
return ram_state.norm_pages;
}
uint64_t xbzrle_mig_bytes_transferred(void)
{
return ram_state.xbzrle_bytes;
}
uint64_t xbzrle_mig_pages_transferred(void)
{
return ram_state.xbzrle_pages;
}
uint64_t xbzrle_mig_pages_cache_miss(void)
{
return ram_state.xbzrle_cache_miss;
}
double xbzrle_mig_cache_miss_rate(void)
{
return ram_state.xbzrle_cache_miss_rate;
}
uint64_t xbzrle_mig_pages_overflow(void)
{
return ram_state.xbzrle_overflows;
}
uint64_t ram_bytes_transferred(void)
{
return ram_state.bytes_transferred;
}
static RAMState *ram_state;
uint64_t ram_bytes_remaining(void)
{
return ram_state.migration_dirty_pages * TARGET_PAGE_SIZE;
return ram_state->migration_dirty_pages * TARGET_PAGE_SIZE;
}
uint64_t ram_dirty_sync_count(void)
{
return ram_state.bitmap_sync_count;
}
uint64_t ram_dirty_pages_rate(void)
{
return ram_state.dirty_pages_rate;
}
uint64_t ram_postcopy_requests(void)
{
return ram_state.postcopy_requests;
}
MigrationStats ram_counters;
/* used by the search for pages to send */
struct PageSearchStatus {
@ -512,8 +437,8 @@ static void xbzrle_cache_zero_page(RAMState *rs, ram_addr_t current_addr)
/* We don't care if this fails to allocate a new cache page
* as long as it updated an old one */
cache_insert(XBZRLE.cache, current_addr, ZERO_TARGET_PAGE,
rs->bitmap_sync_count);
cache_insert(XBZRLE.cache, current_addr, XBZRLE.zero_target_page,
ram_counters.dirty_sync_count);
}
#define ENCODING_FLAG_XBZRLE 0x1
@ -539,11 +464,12 @@ static int save_xbzrle_page(RAMState *rs, uint8_t **current_data,
int encoded_len = 0, bytes_xbzrle;
uint8_t *prev_cached_page;
if (!cache_is_cached(XBZRLE.cache, current_addr, rs->bitmap_sync_count)) {
rs->xbzrle_cache_miss++;
if (!cache_is_cached(XBZRLE.cache, current_addr,
ram_counters.dirty_sync_count)) {
xbzrle_counters.cache_miss++;
if (!last_stage) {
if (cache_insert(XBZRLE.cache, current_addr, *current_data,
rs->bitmap_sync_count) == -1) {
ram_counters.dirty_sync_count) == -1) {
return -1;
} else {
/* update *current_data when the page has been
@ -568,7 +494,7 @@ static int save_xbzrle_page(RAMState *rs, uint8_t **current_data,
return 0;
} else if (encoded_len == -1) {
trace_save_xbzrle_page_overflow();
rs->xbzrle_overflows++;
xbzrle_counters.overflow++;
/* update data in the cache */
if (!last_stage) {
memcpy(prev_cached_page, *current_data, TARGET_PAGE_SIZE);
@ -589,9 +515,9 @@ static int save_xbzrle_page(RAMState *rs, uint8_t **current_data,
qemu_put_be16(rs->f, encoded_len);
qemu_put_buffer(rs->f, XBZRLE.encoded_buf, encoded_len);
bytes_xbzrle += encoded_len + 1 + 2;
rs->xbzrle_pages++;
rs->xbzrle_bytes += bytes_xbzrle;
rs->bytes_transferred += bytes_xbzrle;
xbzrle_counters.pages++;
xbzrle_counters.bytes += bytes_xbzrle;
ram_counters.transferred += bytes_xbzrle;
return 1;
}
@ -673,7 +599,7 @@ static void migration_bitmap_sync(RAMState *rs)
int64_t end_time;
uint64_t bytes_xfer_now;
rs->bitmap_sync_count++;
ram_counters.dirty_sync_count++;
if (!rs->time_last_bitmap_sync) {
rs->time_last_bitmap_sync = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
@ -697,9 +623,9 @@ static void migration_bitmap_sync(RAMState *rs)
/* more than 1 second = 1000 millisecons */
if (end_time > rs->time_last_bitmap_sync + 1000) {
/* calculate period counters */
rs->dirty_pages_rate = rs->num_dirty_pages_period * 1000
ram_counters.dirty_pages_rate = rs->num_dirty_pages_period * 1000
/ (end_time - rs->time_last_bitmap_sync);
bytes_xfer_now = ram_bytes_transferred();
bytes_xfer_now = ram_counters.transferred;
if (migrate_auto_converge()) {
/* The following detection logic can be refined later. For now:
@ -719,13 +645,13 @@ static void migration_bitmap_sync(RAMState *rs)
if (migrate_use_xbzrle()) {
if (rs->iterations_prev != rs->iterations) {
rs->xbzrle_cache_miss_rate =
(double)(rs->xbzrle_cache_miss -
xbzrle_counters.cache_miss_rate =
(double)(xbzrle_counters.cache_miss -
rs->xbzrle_cache_miss_prev) /
(rs->iterations - rs->iterations_prev);
}
rs->iterations_prev = rs->iterations;
rs->xbzrle_cache_miss_prev = rs->xbzrle_cache_miss;
rs->xbzrle_cache_miss_prev = xbzrle_counters.cache_miss;
}
/* reset period counters */
@ -734,7 +660,7 @@ static void migration_bitmap_sync(RAMState *rs)
rs->bytes_xfer_prev = bytes_xfer_now;
}
if (migrate_use_events()) {
qapi_event_send_migration_pass(rs->bitmap_sync_count, NULL);
qapi_event_send_migration_pass(ram_counters.dirty_sync_count, NULL);
}
}
@ -754,11 +680,11 @@ static int save_zero_page(RAMState *rs, RAMBlock *block, ram_addr_t offset,
int pages = -1;
if (is_zero_range(p, TARGET_PAGE_SIZE)) {
rs->zero_pages++;
rs->bytes_transferred +=
ram_counters.duplicate++;
ram_counters.transferred +=
save_page_header(rs, rs->f, block, offset | RAM_SAVE_FLAG_ZERO);
qemu_put_byte(rs->f, 0);
rs->bytes_transferred += 1;
ram_counters.transferred += 1;
pages = 1;
}
@ -806,7 +732,7 @@ static int ram_save_page(RAMState *rs, PageSearchStatus *pss, bool last_stage)
ret = ram_control_save_page(rs->f, block->offset,
offset, TARGET_PAGE_SIZE, &bytes_xmit);
if (bytes_xmit) {
rs->bytes_transferred += bytes_xmit;
ram_counters.transferred += bytes_xmit;
pages = 1;
}
@ -817,9 +743,9 @@ static int ram_save_page(RAMState *rs, PageSearchStatus *pss, bool last_stage)
if (ret != RAM_SAVE_CONTROL_NOT_SUPP) {
if (ret != RAM_SAVE_CONTROL_DELAYED) {
if (bytes_xmit > 0) {
rs->norm_pages++;
ram_counters.normal++;
} else if (bytes_xmit == 0) {
rs->zero_pages++;
ram_counters.duplicate++;
}
}
} else {
@ -845,8 +771,8 @@ static int ram_save_page(RAMState *rs, PageSearchStatus *pss, bool last_stage)
/* XBZRLE overflow or normal page */
if (pages == -1) {
rs->bytes_transferred += save_page_header(rs, rs->f, block,
offset | RAM_SAVE_FLAG_PAGE);
ram_counters.transferred +=
save_page_header(rs, rs->f, block, offset | RAM_SAVE_FLAG_PAGE);
if (send_async) {
qemu_put_buffer_async(rs->f, p, TARGET_PAGE_SIZE,
migrate_release_ram() &
@ -854,9 +780,9 @@ static int ram_save_page(RAMState *rs, PageSearchStatus *pss, bool last_stage)
} else {
qemu_put_buffer(rs->f, p, TARGET_PAGE_SIZE);
}
rs->bytes_transferred += TARGET_PAGE_SIZE;
ram_counters.transferred += TARGET_PAGE_SIZE;
pages = 1;
rs->norm_pages++;
ram_counters.normal++;
}
XBZRLE_cache_unlock();
@ -867,7 +793,7 @@ 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);
@ -908,7 +834,7 @@ static void flush_compressed_data(RAMState *rs)
qemu_mutex_lock(&comp_param[idx].mutex);
if (!comp_param[idx].quit) {
len = qemu_put_qemu_file(rs->f, comp_param[idx].file);
rs->bytes_transferred += len;
ram_counters.transferred += len;
}
qemu_mutex_unlock(&comp_param[idx].mutex);
}
@ -938,8 +864,8 @@ static int compress_page_with_multi_thread(RAMState *rs, RAMBlock *block,
qemu_cond_signal(&comp_param[idx].cond);
qemu_mutex_unlock(&comp_param[idx].mutex);
pages = 1;
rs->norm_pages++;
rs->bytes_transferred += bytes_xmit;
ram_counters.normal++;
ram_counters.transferred += bytes_xmit;
break;
}
}
@ -979,15 +905,15 @@ static int ram_save_compressed_page(RAMState *rs, PageSearchStatus *pss,
ret = ram_control_save_page(rs->f, block->offset,
offset, TARGET_PAGE_SIZE, &bytes_xmit);
if (bytes_xmit) {
rs->bytes_transferred += bytes_xmit;
ram_counters.transferred += bytes_xmit;
pages = 1;
}
if (ret != RAM_SAVE_CONTROL_NOT_SUPP) {
if (ret != RAM_SAVE_CONTROL_DELAYED) {
if (bytes_xmit > 0) {
rs->norm_pages++;
ram_counters.normal++;
} else if (bytes_xmit == 0) {
rs->zero_pages++;
ram_counters.duplicate++;
}
}
} else {
@ -1007,8 +933,8 @@ static int ram_save_compressed_page(RAMState *rs, PageSearchStatus *pss,
blen = qemu_put_compression_data(rs->f, p, TARGET_PAGE_SIZE,
migrate_compress_level());
if (blen > 0) {
rs->bytes_transferred += bytes_xmit + blen;
rs->norm_pages++;
ram_counters.transferred += bytes_xmit + blen;
ram_counters.normal++;
pages = 1;
} else {
qemu_file_set_error(rs->f, blen);
@ -1184,10 +1110,9 @@ static bool get_queued_page(RAMState *rs, PageSearchStatus *pss)
* be some left. in case that there is any page left, we drop it.
*
*/
void migration_page_queue_free(void)
static void migration_page_queue_free(RAMState *rs)
{
struct RAMSrcPageRequest *mspr, *next_mspr;
RAMState *rs = &ram_state;
/* This queue generally should be empty - but in the case of a failed
* migration might have some droppings in.
*/
@ -1215,9 +1140,9 @@ void migration_page_queue_free(void)
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;
rs->postcopy_requests++;
ram_counters.postcopy_requests++;
rcu_read_lock();
if (!rbname) {
/* Reuse last RAMBlock */
@ -1405,13 +1330,12 @@ static int ram_find_and_save_block(RAMState *rs, bool last_stage)
void acct_update_position(QEMUFile *f, size_t size, bool zero)
{
uint64_t pages = size / TARGET_PAGE_SIZE;
RAMState *rs = &ram_state;
if (zero) {
rs->zero_pages += pages;
ram_counters.duplicate += pages;
} else {
rs->norm_pages += pages;
rs->bytes_transferred += size;
ram_counters.normal += pages;
ram_counters.transferred += size;
qemu_update_position(f, size);
}
}
@ -1437,6 +1361,7 @@ void free_xbzrle_decoded_buf(void)
static void ram_migration_cleanup(void *opaque)
{
RAMState **rsp = opaque;
RAMBlock *block;
/* caller have hold iothread lock or is in a bh, so there is
@ -1456,12 +1381,16 @@ static void ram_migration_cleanup(void *opaque)
cache_fini(XBZRLE.cache);
g_free(XBZRLE.encoded_buf);
g_free(XBZRLE.current_buf);
g_free(ZERO_TARGET_PAGE);
g_free(XBZRLE.zero_target_page);
XBZRLE.cache = NULL;
XBZRLE.encoded_buf = NULL;
XBZRLE.current_buf = NULL;
XBZRLE.zero_target_page = NULL;
}
XBZRLE_cache_unlock();
migration_page_queue_free(*rsp);
g_free(*rsp);
*rsp = NULL;
}
static void ram_state_reset(RAMState *rs)
@ -1632,7 +1561,7 @@ static void postcopy_chunk_hostpages_pass(MigrationState *ms, bool unsent_pass,
RAMBlock *block,
PostcopyDiscardState *pds)
{
RAMState *rs = &ram_state;
RAMState *rs = ram_state;
unsigned long *bitmap = block->bmap;
unsigned long *unsentmap = block->unsentmap;
unsigned int host_ratio = block->page_size / TARGET_PAGE_SIZE;
@ -1787,7 +1716,7 @@ 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;
@ -1870,22 +1799,25 @@ 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();
ZERO_TARGET_PAGE = g_malloc0(TARGET_PAGE_SIZE);
XBZRLE.zero_target_page = g_malloc0(TARGET_PAGE_SIZE);
XBZRLE.cache = cache_init(migrate_xbzrle_cache_size() /
TARGET_PAGE_SIZE,
TARGET_PAGE_SIZE);
if (!XBZRLE.cache) {
XBZRLE_cache_unlock();
error_report("Error creating cache");
g_free(*rsp);
*rsp = NULL;
return -1;
}
XBZRLE_cache_unlock();
@ -1894,6 +1826,8 @@ 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;
}
@ -1902,6 +1836,8 @@ 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;
}
}
@ -1911,7 +1847,7 @@ 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()) {
@ -1933,10 +1869,10 @@ static int ram_state_init(RAMState *rs)
* Count the total number of pages used by ram blocks not including any
* gaps due to alignment or unplugs.
*/
rs->migration_dirty_pages = ram_bytes_total() >> TARGET_PAGE_BITS;
(*rsp)->migration_dirty_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();
@ -1961,16 +1897,16 @@ 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();
@ -2005,7 +1941,8 @@ 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;
@ -2058,7 +1995,7 @@ static int ram_save_iterate(QEMUFile *f, void *opaque)
ram_control_after_iterate(f, RAM_CONTROL_ROUND);
qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
rs->bytes_transferred += 8;
ram_counters.transferred += 8;
ret = qemu_file_get_error(f);
if (ret < 0) {
@ -2080,7 +2017,8 @@ 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();
@ -2117,7 +2055,8 @@ 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 = rs->migration_dirty_pages * TARGET_PAGE_SIZE;

15
migration/ram.h
View File

@ -32,19 +32,11 @@
#include "qemu-common.h"
#include "exec/cpu-common.h"
extern MigrationStats ram_counters;
extern XBZRLECacheStats xbzrle_counters;
int64_t xbzrle_cache_resize(int64_t new_size);
uint64_t dup_mig_pages_transferred(void);
uint64_t norm_mig_pages_transferred(void);
uint64_t xbzrle_mig_bytes_transferred(void);
uint64_t xbzrle_mig_pages_transferred(void);
uint64_t xbzrle_mig_pages_cache_miss(void);
double xbzrle_mig_cache_miss_rate(void);
uint64_t xbzrle_mig_pages_overflow(void);
uint64_t ram_bytes_transferred(void);
uint64_t ram_bytes_remaining(void);
uint64_t ram_dirty_sync_count(void);
uint64_t ram_dirty_pages_rate(void);
uint64_t ram_postcopy_requests(void);
uint64_t ram_bytes_total(void);
void migrate_compress_threads_create(void);
@ -53,7 +45,6 @@ void migrate_decompress_threads_create(void);
void migrate_decompress_threads_join(void);
uint64_t ram_pagesize_summary(void);
void migration_page_queue_free(void);
int ram_save_queue_pages(const char *rbname, ram_addr_t start, ram_addr_t len);
void acct_update_position(QEMUFile *f, size_t size, bool zero);
void free_xbzrle_decoded_buf(void);

1
migration/savevm.c
View File

@ -2276,7 +2276,6 @@ int load_snapshot(const char *name, Error **errp)
aio_context_acquire(aio_context);
ret = qemu_loadvm_state(f);
qemu_fclose(f);
aio_context_release(aio_context);
migration_incoming_state_destroy();