Subject: [PATCH 05/46] rdma: introduce qemu_update_position()

From: Nigel Croxon <[email-masked]>
Date: Thu, 14 Nov 2013 22:52:41 +0100

RH-Author: Nigel Croxon <[email-masked]>
Message-id: <[email-masked]>
Patchwork-id: 55689
O-Subject: [RHEL7.0 PATCH 05/42] rdma: introduce qemu_update_position()
Bugzilla: 1011720
RH-Acked-by: Orit Wasserman <[email-masked]>
RH-Acked-by: Amit Shah <[email-masked]>
RH-Acked-by: Paolo Bonzini <[email-masked]>

Bugzilla: 1011720
https://bugzilla.redhat.com/show_bug.cgi?id=1011720

>From commit ID:
commit 2b0ce0797d6bfb13ebefe010da86abced0b7a9b3
Author: Michael R. Hines <[email-masked]>
Date:   Tue Jun 25 21:35:28 2013 -0400

    rdma: introduce qemu_update_position()

    RDMA writes happen asynchronously, and thus the performance accounting
    also needs to be able to occur asynchronously. This allows anybody
    to call into savevm.c to update both f->pos as well as into arch_init.c
    to update the acct_info structure with up-to-date values when
    the RDMA transfer actually completes.

    Reviewed-by: Juan Quintela <[email-masked]>
    Tested-by: Chegu Vinod <[email-masked]>
    Tested-by: Michael R. Hines <[email-masked]>
    Signed-off-by: Michael R. Hines <[email-masked]>
    Signed-off-by: Juan Quintela <[email-masked]>
---
 arch_init.c                   |   12 ++++++++++++
 include/migration/migration.h |    2 ++
 include/migration/qemu-file.h |    1 +
 savevm.c                      |    5 +++++
 4 files changed, 20 insertions(+), 0 deletions(-)

Signed-off-by: Michal Novotny <[email-masked]>
---
 arch_init.c                   | 12 ++++++++++++
 include/migration/migration.h |  2 ++
 include/migration/qemu-file.h |  1 +
 savevm.c                      |  5 +++++
 4 files changed, 20 insertions(+)

diff --git a/arch_init.c b/arch_init.c
index 2c0ea1b..e940ede 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -522,6 +522,18 @@ static int ram_save_block(QEMUFile *f, bool last_stage)
 
 static uint64_t bytes_transferred;
 
+void acct_update_position(QEMUFile *f, size_t size, bool zero)
+{
+    uint64_t pages = size / TARGET_PAGE_SIZE;
+    if (zero) {
+        acct_info.dup_pages += pages;
+    } else {
+        acct_info.norm_pages += pages;
+        bytes_transferred += size;
+        qemu_update_position(f, size);
+    }
+}
+
 static ram_addr_t ram_save_remaining(void)
 {
     return migration_dirty_pages;
diff --git a/include/migration/migration.h b/include/migration/migration.h
index f1519dd..2f3a3d9 100644
--- a/include/migration/migration.h
+++ b/include/migration/migration.h
@@ -92,6 +92,8 @@ uint64_t ram_bytes_remaining(void);
 uint64_t ram_bytes_transferred(void);
 uint64_t ram_bytes_total(void);
 
+void acct_update_position(QEMUFile *f, size_t size, bool zero);
+
 extern SaveVMHandlers savevm_ram_handlers;
 
 uint64_t dup_mig_bytes_transferred(void);
diff --git a/include/migration/qemu-file.h b/include/migration/qemu-file.h
index 8931e16..fb1cf40 100644
--- a/include/migration/qemu-file.h
+++ b/include/migration/qemu-file.h
@@ -93,6 +93,7 @@ void qemu_put_be32(QEMUFile *f, unsigned int v);
 void qemu_put_be64(QEMUFile *f, uint64_t v);
 int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size);
 int qemu_get_byte(QEMUFile *f);
+void qemu_update_position(QEMUFile *f, size_t size);
 
 static inline unsigned int qemu_get_ubyte(QEMUFile *f)
 {
diff --git a/savevm.c b/savevm.c
index 4d898af..f68f7f2 100644
--- a/savevm.c
+++ b/savevm.c
@@ -671,6 +671,11 @@ int qemu_get_fd(QEMUFile *f)
     return -1;
 }
 
+void qemu_update_position(QEMUFile *f, size_t size)
+{
+    f->pos += size;
+}
+
 /** Closes the file
  *
  * Returns negative error value if any error happened on previous operations or
-- 
1.7.11.7