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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
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@ -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);