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[Qemu-devel] [PATCH v2 15/18] COLO: flush host dirty ram from cache
From: |
zhanghailiang |
Subject: |
[Qemu-devel] [PATCH v2 15/18] COLO: flush host dirty ram from cache |
Date: |
Sat, 22 Apr 2017 16:25:55 +0800 |
Don't need to flush all VM's ram from cache, only
flush the dirty pages since last checkpoint
Cc: Juan Quintela <address@hidden>
Signed-off-by: Li Zhijian <address@hidden>
Signed-off-by: Zhang Chen <address@hidden>
Signed-off-by: zhanghailiang <address@hidden>
---
v2:
- stop dirty log after exit from COLO state. (Dave)
---
migration/ram.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/migration/ram.c b/migration/ram.c
index f171a82..7bf3515 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -2775,6 +2775,7 @@ int colo_init_ram_cache(void)
ram_state.ram_bitmap = g_new0(RAMBitmap, 1);
ram_state.ram_bitmap->bmap = bitmap_new(last_ram_page());
ram_state.migration_dirty_pages = 0;
+ memory_global_dirty_log_start();
return 0;
@@ -2798,6 +2799,7 @@ void colo_release_ram_cache(void)
atomic_rcu_set(&ram_state.ram_bitmap, NULL);
if (bitmap) {
+ memory_global_dirty_log_stop();
call_rcu(bitmap, migration_bitmap_free, rcu);
}
@@ -2822,6 +2824,16 @@ void colo_flush_ram_cache(void)
void *src_host;
unsigned long offset = 0;
+ memory_global_dirty_log_sync();
+ qemu_mutex_lock(&ram_state.bitmap_mutex);
+ rcu_read_lock();
+ QLIST_FOREACH_RCU(block, &ram_list.blocks, next) {
+ migration_bitmap_sync_range(&ram_state, block, block->offset,
+ block->used_length);
+ }
+ rcu_read_unlock();
+ qemu_mutex_unlock(&ram_state.bitmap_mutex);
+
trace_colo_flush_ram_cache_begin(ram_state.migration_dirty_pages);
rcu_read_lock();
block = QLIST_FIRST_RCU(&ram_list.blocks);
--
1.8.3.1
- [Qemu-devel] [PATCH v2 00/18] COLO: integrate colo frame with block replication and net compare, zhanghailiang, 2017/04/22
- [Qemu-devel] [PATCH v2 09/18] COLO: Flush memory data from ram cache, zhanghailiang, 2017/04/22
- [Qemu-devel] [PATCH v2 12/18] savevm: split the process of different stages for loadvm/savevm, zhanghailiang, 2017/04/22
- [Qemu-devel] [PATCH v2 04/18] COLO: integrate colo compare with colo frame, zhanghailiang, 2017/04/22
- [Qemu-devel] [PATCH v2 08/18] ram/COLO: Record the dirty pages that SVM received, zhanghailiang, 2017/04/22
- [Qemu-devel] [PATCH v2 11/18] savevm: split save/find loadvm_handlers entry into two helper functions, zhanghailiang, 2017/04/22
- [Qemu-devel] [PATCH v2 13/18] COLO: Separate the process of saving/loading ram and device state, zhanghailiang, 2017/04/22
- [Qemu-devel] [PATCH v2 06/18] COLO: Add block replication into colo process, zhanghailiang, 2017/04/22
- [Qemu-devel] [PATCH v2 14/18] COLO: Split qemu_savevm_state_begin out of checkpoint process, zhanghailiang, 2017/04/22
- [Qemu-devel] [PATCH v2 15/18] COLO: flush host dirty ram from cache,
zhanghailiang <=
- [Qemu-devel] [PATCH v2 02/18] colo-compare: implement the process of checkpoint, zhanghailiang, 2017/04/22
- [Qemu-devel] [PATCH v2 01/18] net/colo: Add notifier/callback related helpers for filter, zhanghailiang, 2017/04/22
- [Qemu-devel] [PATCH v2 16/18] filter: Add handle_event method for NetFilterClass, zhanghailiang, 2017/04/22
- [Qemu-devel] [PATCH v2 17/18] filter-rewriter: handle checkpoint and failover event, zhanghailiang, 2017/04/22
- [Qemu-devel] [PATCH v2 07/18] COLO: Load dirty pages into SVM's RAM cache firstly, zhanghailiang, 2017/04/22
- [Qemu-devel] [PATCH v2 10/18] qmp event: Add COLO_EXIT event to notify users while exited COLO, zhanghailiang, 2017/04/22
- [Qemu-devel] [PATCH v2 05/18] COLO: Handle shutdown command for VM in COLO state, zhanghailiang, 2017/04/22
- [Qemu-devel] [PATCH v2 18/18] COLO: notify net filters about checkpoint/failover event, zhanghailiang, 2017/04/22