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migration: add an indicator for bulk state of ram migration 

the first round of ram transfer is special since all pages
are dirty and thus all memory pages are transferred to
the target. this patch adds a boolean variable to track
this stage.

Signed-off-by: Peter Lieven <pl@kamp.de>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Orit Wasserman <owasserm@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Peter Lieven 2013-03-26 10:58:36 +01:00 committed by Juan Quintela
parent 3edcd7e6eb
commit 78d07ae7ac
1 changed files with 3 additions and 0 deletions
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3
arch_init.c
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@ -319,6 +319,7 @@ static ram_addr_t last_offset;
static unsigned long *migration_bitmap;
static uint64_t migration_dirty_pages;
static uint32_t last_version;
static bool ram_bulk_stage;
static inline
ram_addr_t migration_bitmap_find_and_reset_dirty(MemoryRegion *mr,
@ -426,6 +427,7 @@ static int ram_save_block(QEMUFile *f, bool last_stage)
if (!block) {
block = QTAILQ_FIRST(&ram_list.blocks);
complete_round = true;
ram_bulk_stage = false;
}
} else {
uint8_t *p;
@ -529,6 +531,7 @@ static void reset_ram_globals(void)
last_sent_block = NULL;
last_offset = 0;
last_version = ram_list.version;
ram_bulk_stage = true;
}
#define MAX_WAIT 50 /* ms, half buffered_file limit */