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authorHyman Huang(黄勇) <huangy81@chinatelecom.cn>2021-06-29 16:01:19 +0000
committerJuan Quintela <quintela@redhat.com>2021-11-01 22:56:43 +0100
commit63b41db4bc776e71384d14d68a8ec6e0aae5ea3a (patch)
tree8d3b98aaf502edc40bfaeed25fb278561042596c /include/exec/memory.h
parent7786ae40ba4e7d5b9ebbfd07924f4379e218c6ef (diff)
memory: make global_dirty_tracking a bitmask
since dirty ring has been introduced, there are two methods to track dirty pages of vm. it seems that "logging" has a hint on the method, so rename the global_dirty_log to global_dirty_tracking would make description more accurate. dirty rate measurement may start or stop dirty tracking during calculation. this conflict with migration because stop dirty tracking make migration leave dirty pages out then that'll be a problem. make global_dirty_tracking a bitmask can let both migration and dirty rate measurement work fine. introduce GLOBAL_DIRTY_MIGRATION and GLOBAL_DIRTY_DIRTY_RATE to distinguish what current dirty tracking aims for, migration or dirty rate. Signed-off-by: Hyman Huang(黄勇) <huangy81@chinatelecom.cn> Message-Id: <9c9388657cfa0301bd2c1cfa36e7cf6da4aeca19.1624040308.git.huangy81@chinatelecom.cn> Reviewed-by: Peter Xu <peterx@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
Diffstat (limited to 'include/exec/memory.h')
-rw-r--r--include/exec/memory.h20
1 files changed, 17 insertions, 3 deletions
diff --git a/include/exec/memory.h b/include/exec/memory.h
index a185b6dcb8..04280450c9 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -61,7 +61,17 @@ static inline void fuzz_dma_read_cb(size_t addr,
}
#endif
-extern bool global_dirty_log;
+/* Possible bits for global_dirty_log_{start|stop} */
+
+/* Dirty tracking enabled because migration is running */
+#define GLOBAL_DIRTY_MIGRATION (1U << 0)
+
+/* Dirty tracking enabled because measuring dirty rate */
+#define GLOBAL_DIRTY_DIRTY_RATE (1U << 1)
+
+#define GLOBAL_DIRTY_MASK (0x3)
+
+extern unsigned int global_dirty_tracking;
typedef struct MemoryRegionOps MemoryRegionOps;
@@ -2388,13 +2398,17 @@ void memory_listener_unregister(MemoryListener *listener);
/**
* memory_global_dirty_log_start: begin dirty logging for all regions
+ *
+ * @flags: purpose of starting dirty log, migration or dirty rate
*/
-void memory_global_dirty_log_start(void);
+void memory_global_dirty_log_start(unsigned int flags);
/**
* memory_global_dirty_log_stop: end dirty logging for all regions
+ *
+ * @flags: purpose of stopping dirty log, migration or dirty rate
*/
-void memory_global_dirty_log_stop(void);
+void memory_global_dirty_log_stop(unsigned int flags);
void mtree_info(bool flatview, bool dispatch_tree, bool owner, bool disabled);