[Qemu-devel] [PULL 32/65] ram: Move last_req_rb to RAMState

[Juan Quintela <quintela@redhat.com>]

It was on MigrationState when it is only used inside ram.c for
postcopy.  Problem is that we need to access it without being able to
pass it RAMState directly.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
---
 include/migration/migration.h | 2 --
 migration/migration.c         | 1 -
 migration/ram.c               | 7 +++++--
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/include/migration/migration.h b/include/migration/migration.h
index 87d0cc5..0f75573 100644
--- a/include/migration/migration.h
+++ b/include/migration/migration.h
@@ -189,8 +189,6 @@ struct MigrationState
     /* Queue of outstanding page requests from the destination */
     QemuMutex src_page_req_mutex;
     QSIMPLEQ_HEAD(src_page_requests, MigrationSrcPageRequest) src_page_requests;
-    /* The RAMBlock used in the last src_page_request */
-    RAMBlock *last_req_rb;
     /* The semaphore is used to notify COLO thread that failover is finished */
     QemuSemaphore colo_exit_sem;
 
diff --git a/migration/migration.c b/migration/migration.c
index 7f7bab9..c1730a0 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -1126,7 +1126,6 @@ MigrationState *migrate_init(const MigrationParams *params)
     s->postcopy_after_devices = false;
     s->postcopy_requests = 0;
     s->migration_thread_running = false;
-    s->last_req_rb = NULL;
     error_free(s->error);
     s->error = NULL;
 
diff --git a/migration/ram.c b/migration/ram.c
index 2f5cbd1..cec51b4 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -204,6 +204,8 @@ struct RAMState {
     QemuMutex bitmap_mutex;
     /* Ram Bitmap protected by RCU */
     RAMBitmap *ram_bitmap;
+    /* The RAMBlock used in the last src_page_requests */
+    RAMBlock *last_req_rb;
 };
 typedef struct RAMState RAMState;
 
@@ -1226,12 +1228,13 @@ int ram_save_queue_pages(MigrationState *ms, const char *rbname,
                          ram_addr_t start, ram_addr_t len)
 {
     RAMBlock *ramblock;
+    RAMState *rs = &ram_state;
 
     ms->postcopy_requests++;
     rcu_read_lock();
     if (!rbname) {
         /* Reuse last RAMBlock */
-        ramblock = ms->last_req_rb;
+        ramblock = rs->last_req_rb;
 
         if (!ramblock) {
             /*
@@ -1249,7 +1252,7 @@ int ram_save_queue_pages(MigrationState *ms, const char *rbname,
             error_report("ram_save_queue_pages no block '%s'", rbname);
             goto err;
         }
-        ms->last_req_rb = ramblock;
+        rs->last_req_rb = ramblock;
     }
     trace_ram_save_queue_pages(ramblock->idstr, start, len);
     if (start+len > ramblock->used_length) {
-- 
2.9.3