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[Qemu-devel] [PATCH 02/14] add a version number to ram_list
From: |
Juan Quintela |
Subject: |
[Qemu-devel] [PATCH 02/14] add a version number to ram_list |
Date: |
Fri, 21 Sep 2012 16:08:08 +0200 |
From: Umesh Deshpande <address@hidden>
This will be used to detect if last_block might have become invalid
across different calls to ram_save_live.
Signed-off-by: Paolo Bonzini <address@hidden>
Signed-off-by: Umesh Deshpande <address@hidden>
Signed-off-by: Juan Quintela <address@hidden>
---
arch_init.c | 7 ++++++-
cpu-all.h | 1 +
exec.c | 4 ++++
3 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/arch_init.c b/arch_init.c
index d96e888..eb33fdd 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -336,6 +336,7 @@ static RAMBlock *last_block;
static ram_addr_t last_offset;
static unsigned long *migration_bitmap;
static uint64_t migration_dirty_pages;
+static uint32_t last_version;
static inline bool migration_bitmap_test_and_reset_dirty(MemoryRegion *mr,
ram_addr_t offset)
@@ -406,7 +407,6 @@ static void migration_bitmap_sync(void)
}
}
-
/*
* ram_save_block: Writes a page of memory to the stream f
*
@@ -558,6 +558,7 @@ static void reset_ram_globals(void)
{
last_block = NULL;
last_offset = 0;
+ last_version = ram_list.version;
sort_ram_list();
}
@@ -613,6 +614,10 @@ static int ram_save_iterate(QEMUFile *f, void *opaque)
uint64_t expected_downtime;
MigrationState *s = migrate_get_current();
+ if (ram_list.version != last_version) {
+ reset_ram_globals();
+ }
+
bytes_transferred_last = bytes_transferred;
bwidth = qemu_get_clock_ns(rt_clock);
diff --git a/cpu-all.h b/cpu-all.h
index 3e67019..6576229 100644
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -497,6 +497,7 @@ typedef struct RAMBlock {
typedef struct RAMList {
uint8_t *phys_dirty;
+ uint32_t version;
QLIST_HEAD(, RAMBlock) blocks_mru;
QLIST_HEAD(, RAMBlock) blocks;
} RAMList;
diff --git a/exec.c b/exec.c
index 0db2beb..e9d1509 100644
--- a/exec.c
+++ b/exec.c
@@ -2583,6 +2583,8 @@ ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void
*host,
QLIST_INSERT_HEAD(&ram_list.blocks, new_block, next);
QLIST_INSERT_HEAD(&ram_list.blocks_mru, new_block, next_mru);
+ ram_list.version++;
+
ram_list.phys_dirty = g_realloc(ram_list.phys_dirty,
last_ram_offset() >> TARGET_PAGE_BITS);
memset(ram_list.phys_dirty + (new_block->offset >> TARGET_PAGE_BITS),
@@ -2610,6 +2612,7 @@ void qemu_ram_free_from_ptr(ram_addr_t addr)
if (addr == block->offset) {
QLIST_REMOVE(block, next);
QLIST_REMOVE(block, next_mru);
+ ram_list.version++;
g_free(block);
return;
}
@@ -2624,6 +2627,7 @@ void qemu_ram_free(ram_addr_t addr)
if (addr == block->offset) {
QLIST_REMOVE(block, next);
QLIST_REMOVE(block, next_mru);
+ ram_list.version++;
if (block->flags & RAM_PREALLOC_MASK) {
;
} else if (mem_path) {
--
1.7.11.4
- [Qemu-devel] [RFC 00/14] Migration thread, Juan Quintela, 2012/09/21
- [Qemu-devel] [PATCH 01/14] split MRU ram list, Juan Quintela, 2012/09/21
- [Qemu-devel] [PATCH 03/14] protect the ramlist with a separate mutex, Juan Quintela, 2012/09/21
- [Qemu-devel] [PATCH 02/14] add a version number to ram_list,
Juan Quintela <=
- [Qemu-devel] [PATCH 04/14] buffered_file: Move from using a timer to use a thread, Juan Quintela, 2012/09/21
- [Qemu-devel] [PATCH 05/14] migration: make qemu_fopen_ops_buffered() return void, Juan Quintela, 2012/09/21
- [Qemu-devel] [PATCH 09/14] migration: take finer locking, Juan Quintela, 2012/09/21
- [Qemu-devel] [PATCH 08/14] migration: remove unfreeze logic, Juan Quintela, 2012/09/21
- [Qemu-devel] [PATCH 13/14] savevm: New save live migration method: pending, Juan Quintela, 2012/09/21