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Reduce the time of checkpoint for COLO 

we should set ram_bulk_stage to false after ram_state_init,
otherwise the bitmap will be unused in migration_bitmap_find_dirty.
all pages in ram cache will be flushed to the ram of secondary guest
for each checkpoint.

Signed-off-by: Lei Rao <lei.rao@intel.com>
Signed-off-by: Derek Su <dereksu@qnap.com>
Signed-off-by: Zhang Chen <chen.zhang@intel.com>
Reviewed-by: Li Zhijian <lizhijian@cn.fujitsu.com>
Reviewed-by: Zhang Chen <chen.zhang@intel.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Rao, Lei 2020-10-16 13:52:01 +08:00 committed by Jason Wang
parent 33609e95b2
commit b70cb3b485
1 changed files with 13 additions and 1 deletions
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14
migration/ram.c
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@ -3011,6 +3011,18 @@ static void decompress_data_with_multi_threads(QEMUFile *f,
qemu_mutex_unlock(&decomp_done_lock);
}
/*
* we must set ram_bulk_stage to false, otherwise in
* migation_bitmap_find_dirty the bitmap will be unused and
* all the pages in ram cache wil be flushed to the ram of
* secondary VM.
*/
static void colo_init_ram_state(void)
{
ram_state_init(&ram_state);
ram_state->ram_bulk_stage = false;
}
/*
* colo cache: this is for secondary VM, we cache the whole
* memory of the secondary VM, it is need to hold the global lock
@ -3054,7 +3066,7 @@ int colo_init_ram_cache(void)
}
}
ram_state_init(&ram_state);
colo_init_ram_state();
return 0;
}