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| author | Zhang Chen <zhangckid@gmail.com> | 2018-09-03 12:38:48 +0800 |
|---|---|---|
| committer | Jason Wang <jasowang@redhat.com> | 2018-10-19 11:15:03 +0800 |
| commit | 13af18f2228892d19d40ff96672677d168da7e9e (patch) | |
| tree | 3b2f851c82349606015b85fe2d688cc8643035cc /migration/ram.h | |
| parent | aad555c2294b5de22524b7dbacc728d51cc63bcc (diff) | |
| download | qemu-13af18f2228892d19d40ff96672677d168da7e9e.zip qemu-13af18f2228892d19d40ff96672677d168da7e9e.tar.gz qemu-13af18f2228892d19d40ff96672677d168da7e9e.tar.bz2 | |
COLO: Load dirty pages into SVM's RAM cache firstly
We should not load PVM's state directly into SVM, because there maybe some
errors happen when SVM is receving data, which will break SVM.
We need to ensure receving all data before load the state into SVM. We use
an extra memory to cache these data (PVM's ram). The ram cache in secondary side
is initially the same as SVM/PVM's memory. And in the process of checkpoint,
we cache the dirty pages of PVM into this ram cache firstly, so this ram cache
always the same as PVM's memory at every checkpoint, then we flush this cached ram
to SVM after we receive all PVM's state.
Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
Signed-off-by: Zhang Chen <zhangckid@gmail.com>
Signed-off-by: Zhang Chen <chen.zhang@intel.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Diffstat (limited to 'migration/ram.h')
| -rw-r--r-- | migration/ram.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/migration/ram.h b/migration/ram.h index a139066..83ff1bc 100644 --- a/migration/ram.h +++ b/migration/ram.h @@ -71,4 +71,8 @@ int64_t ramblock_recv_bitmap_send(QEMUFile *file, const char *block_name); int ram_dirty_bitmap_reload(MigrationState *s, RAMBlock *rb); +/* ram cache */ +int colo_init_ram_cache(void); +void colo_release_ram_cache(void); + #endif |