[PATCH v0 4/4] background snapshot: add trace events for page fault processing

[Denis Plotnikov <dplotnikov@virtuozzo.com>]

Signed-off-by: Denis Plotnikov <dplotnikov@virtuozzo.com>
---
 migration/ram.c        | 4 ++++
 migration/trace-events | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/migration/ram.c b/migration/ram.c
index f187b5b494..29712a11c2 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -2172,12 +2172,16 @@ again:
             break;
         }
 
+        trace_page_fault_processing_start(msg.arg.pagefault.address);
+
         if (ram_process_page_fault(msg.arg.pagefault.address) < 0) {
             error_report("page fault: error on write protected page "
                          "processing [0x%llx]",
                          msg.arg.pagefault.address);
             break;
         }
+
+        trace_page_fault_processing_finish(msg.arg.pagefault.address);
     }
 
     return NULL;
diff --git a/migration/trace-events b/migration/trace-events
index 4ab0a503d2..f46b3b9a72 100644
--- a/migration/trace-events
+++ b/migration/trace-events
@@ -128,6 +128,8 @@ save_xbzrle_page_skipping(void) ""
 save_xbzrle_page_overflow(void) ""
 ram_save_iterate_big_wait(uint64_t milliconds, int iterations) "big wait: %" PRIu64 " milliseconds, %d iterations"
 ram_load_complete(int ret, uint64_t seq_iter) "exit_code %d seq iteration %" PRIu64
+page_fault_processing_start(unsigned long address) "HVA: 0x%lx"
+page_fault_processing_finish(unsigned long address) "HVA: 0x%lx"
 
 # migration.c
 await_return_path_close_on_source_close(void) ""
-- 
2.17.0