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ram: Add dirty_rate_high_cnt to RAMState 

We need to add a parameter to several functions to make this work.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
This commit is contained in:
Juan Quintela 2017-03-13 19:35:50 +01:00
parent 6f37bb8bf3
commit 8d820d6f67
1 changed files with 11 additions and 10 deletions
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21
migration/ram.c
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@ -45,8 +45,6 @@
#include "qemu/rcu_queue.h"
#include "migration/colo.h"
static int dirty_rate_high_cnt;
static uint64_t bitmap_sync_count;
/***********************************************************/
@ -154,6 +152,8 @@ struct RAMState {
uint32_t last_version;
/* We are in the first round */
bool ram_bulk_stage;
/* How many times we have dirty too many pages */
int dirty_rate_high_cnt;
};
typedef struct RAMState RAMState;
@ -651,7 +651,7 @@ uint64_t ram_pagesize_summary(void)
return summary;
}
static void migration_bitmap_sync(void)
static void migration_bitmap_sync(RAMState *rs)
{
RAMBlock *block;
MigrationState *s = migrate_get_current();
@ -696,9 +696,9 @@ static void migration_bitmap_sync(void)
if (s->dirty_pages_rate &&
(num_dirty_pages_period * TARGET_PAGE_SIZE >
(bytes_xfer_now - bytes_xfer_prev)/2) &&
(dirty_rate_high_cnt++ >= 2)) {
(rs->dirty_rate_high_cnt++ >= 2)) {
trace_migration_throttle();
dirty_rate_high_cnt = 0;
rs->dirty_rate_high_cnt = 0;
mig_throttle_guest_down();
}
bytes_xfer_prev = bytes_xfer_now;
@ -1920,7 +1920,7 @@ int ram_postcopy_send_discard_bitmap(MigrationState *ms)
rcu_read_lock();
/* This should be our last sync, the src is now paused */
migration_bitmap_sync();
migration_bitmap_sync(&ram_state);
unsentmap = atomic_rcu_read(&migration_bitmap_rcu)->unsentmap;
if (!unsentmap) {
@ -1998,7 +1998,7 @@ static int ram_save_init_globals(RAMState *rs)
{
int64_t ram_bitmap_pages; /* Size of bitmap in pages, including gaps */
dirty_rate_high_cnt = 0;
rs->dirty_rate_high_cnt = 0;
bitmap_sync_count = 0;
migration_bitmap_sync_init();
qemu_mutex_init(&migration_bitmap_mutex);
@ -2062,7 +2062,7 @@ static int ram_save_init_globals(RAMState *rs)
migration_dirty_pages = ram_bytes_total() >> TARGET_PAGE_BITS;
memory_global_dirty_log_start();
migration_bitmap_sync();
migration_bitmap_sync(rs);
qemu_mutex_unlock_ramlist();
qemu_mutex_unlock_iothread();
rcu_read_unlock();
@ -2210,7 +2210,7 @@ static int ram_save_complete(QEMUFile *f, void *opaque)
rcu_read_lock();
if (!migration_in_postcopy(migrate_get_current())) {
migration_bitmap_sync();
migration_bitmap_sync(rs);
}
ram_control_before_iterate(f, RAM_CONTROL_FINISH);
@ -2243,6 +2243,7 @@ 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;
uint64_t remaining_size;
remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE;
@ -2251,7 +2252,7 @@ static void ram_save_pending(QEMUFile *f, void *opaque, uint64_t max_size,
remaining_size < max_size) {
qemu_mutex_lock_iothread();
rcu_read_lock();
migration_bitmap_sync();
migration_bitmap_sync(rs);
rcu_read_unlock();
qemu_mutex_unlock_iothread();
remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE;