qemu-kvm/kvm-migration-Introduce-ram_transferred_add.patch

From 030b54f5a2b2c8976370c962e9847af4746ac2c2 Mon Sep 17 00:00:00 2001
From: David Edmondson <david.edmondson@oracle.com>
Date: Tue, 21 Dec 2021 09:34:40 +0000
Subject: [PATCH 1/9] migration: Introduce ram_transferred_add()
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RH-Author: Leonardo Brás <leobras@redhat.com>
RH-MergeRequest: 201: Zero-copy-send fixes + improvements
RH-Commit: [1/8] a6545760b0de13d533f6164be0545a6720bb42c7
RH-Bugzilla: 2110203
RH-Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
RH-Acked-by: Peter Xu <peterx@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>

Replace direct manipulation of ram_counters.transferred with a
function.

Signed-off-by: David Edmondson <david.edmondson@oracle.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
(cherry picked from commit 4c2d0f6dca24f3396ab0718ad3f9f53cc53004df)
Signed-off-by: Leonardo Bras <leobras@redhat.com>
---
 migration/ram.c | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/migration/ram.c b/migration/ram.c
index 3e208efca7..3e82c4ff46 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -391,6 +391,11 @@ uint64_t ram_bytes_remaining(void)
 
 MigrationStats ram_counters;
 
+static void ram_transferred_add(uint64_t bytes)
+{
+    ram_counters.transferred += bytes;
+}
+
 /* used by the search for pages to send */
 struct PageSearchStatus {
     /* Current block being searched */
@@ -772,7 +777,7 @@ static int save_xbzrle_page(RAMState *rs, uint8_t **current_data,
      * RAM_SAVE_FLAG_CONTINUE.
      */
     xbzrle_counters.bytes += bytes_xbzrle - 8;
-    ram_counters.transferred += bytes_xbzrle;
+    ram_transferred_add(bytes_xbzrle);
 
     return 1;
 }
@@ -1203,7 +1208,7 @@ static int save_zero_page(RAMState *rs, RAMBlock *block, ram_addr_t offset)
 
     if (len) {
         ram_counters.duplicate++;
-        ram_counters.transferred += len;
+        ram_transferred_add(len);
         return 1;
     }
     return -1;
@@ -1239,7 +1244,7 @@ static bool control_save_page(RAMState *rs, RAMBlock *block, ram_addr_t offset,
     }
 
     if (bytes_xmit) {
-        ram_counters.transferred += bytes_xmit;
+        ram_transferred_add(bytes_xmit);
         *pages = 1;
     }
 
@@ -1270,8 +1275,8 @@ static bool control_save_page(RAMState *rs, RAMBlock *block, ram_addr_t offset,
 static int save_normal_page(RAMState *rs, RAMBlock *block, ram_addr_t offset,
                             uint8_t *buf, bool async)
 {
-    ram_counters.transferred += save_page_header(rs, rs->f, block,
-                                                 offset | RAM_SAVE_FLAG_PAGE);
+    ram_transferred_add(save_page_header(rs, rs->f, block,
+                                         offset | RAM_SAVE_FLAG_PAGE));
     if (async) {
         qemu_put_buffer_async(rs->f, buf, TARGET_PAGE_SIZE,
                               migrate_release_ram() &
@@ -1279,7 +1284,7 @@ static int save_normal_page(RAMState *rs, RAMBlock *block, ram_addr_t offset,
     } else {
         qemu_put_buffer(rs->f, buf, TARGET_PAGE_SIZE);
     }
-    ram_counters.transferred += TARGET_PAGE_SIZE;
+    ram_transferred_add(TARGET_PAGE_SIZE);
     ram_counters.normal++;
     return 1;
 }
@@ -1378,7 +1383,7 @@ exit:
 static void
 update_compress_thread_counts(const CompressParam *param, int bytes_xmit)
 {
-    ram_counters.transferred += bytes_xmit;
+    ram_transferred_add(bytes_xmit);
 
     if (param->zero_page) {
         ram_counters.duplicate++;
@@ -2303,7 +2308,7 @@ void acct_update_position(QEMUFile *f, size_t size, bool zero)
         ram_counters.duplicate += pages;
     } else {
         ram_counters.normal += pages;
-        ram_counters.transferred += size;
+        ram_transferred_add(size);
         qemu_update_position(f, size);
     }
 }
@@ -3147,7 +3152,7 @@ out:
 
         qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
         qemu_fflush(f);
-        ram_counters.transferred += 8;
+        ram_transferred_add(8);
 
         ret = qemu_file_get_error(f);
     }
-- 
2.31.1