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add a version number to ram_list

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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 <pbonzini@redhat.com>
Signed-off-by: Umesh Deshpande <udeshpan@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>

Reviewed-by: Orit Wasserman <owasserm@redhat.com>
This commit is contained in:
Umesh Deshpande 2011-08-18 11:41:17 -07:00 committed by Juan Quintela
parent abb26d63e7
commit f798b07f51
3 changed files with 11 additions and 1 deletions
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7
arch_init.c
View File

@ -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
*
@ -533,6 +533,7 @@ static void reset_ram_globals(void)
{
last_block = NULL;
last_offset = 0;
last_version = ram_list.version;
}
#define MAX_WAIT 50 /* ms, half buffered_file limit */
@ -587,6 +588,10 @@ 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);

4
exec.c
View File

@ -1056,6 +1056,8 @@ ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
}
ram_list.mru_block = NULL;
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),
@ -1084,6 +1086,7 @@ void qemu_ram_free_from_ptr(ram_addr_t addr)
if (addr == block->offset) {
QTAILQ_REMOVE(&ram_list.blocks, block, next);
ram_list.mru_block = NULL;
ram_list.version++;
g_free(block);
return;
}
@ -1098,6 +1101,7 @@ void qemu_ram_free(ram_addr_t addr)
if (addr == block->offset) {
QTAILQ_REMOVE(&ram_list.blocks, block, next);
ram_list.mru_block = NULL;
ram_list.version++;
if (block->flags & RAM_PREALLOC_MASK) {
;
} else if (mem_path) {

1
include/exec/cpu-all.h
View File

@ -497,6 +497,7 @@ typedef struct RAMList {
uint8_t *phys_dirty;
RAMBlock *mru_block;
QTAILQ_HEAD(, RAMBlock) blocks;
uint32_t version;
} RAMList;
extern RAMList ram_list;