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migration: remove last_sent_block from save_page_header 

Compression code (still not on tree) want to call this funtion from
outside the migration thread, so we can't write to last_sent_block.

Instead of reverting full patch:

[PULL 07/11] save_block_hdr: we can recalculate

Just revert the parts that touch last_sent_block.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Juan Quintela 2015-03-17 12:56:13 +01:00
parent 80b262e143
commit 43edc0ed11
1 changed files with 6 additions and 6 deletions
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12
arch_init.c
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@ -332,19 +332,14 @@ static size_t save_page_header(QEMUFile *f, RAMBlock *block, ram_addr_t offset)
{
size_t size;
if (block == last_sent_block) {
offset |= RAM_SAVE_FLAG_CONTINUE;
}
qemu_put_be64(f, offset);
size = 8;
if (block != last_sent_block) {
if (!(offset & RAM_SAVE_FLAG_CONTINUE)) {
qemu_put_byte(f, strlen(block->idstr));
qemu_put_buffer(f, (uint8_t *)block->idstr,
strlen(block->idstr));
size += 1 + strlen(block->idstr);
last_sent_block = block;
}
return size;
}
@ -644,6 +639,10 @@ static int ram_save_page(QEMUFile *f, RAMBlock* block, ram_addr_t offset,
XBZRLE_cache_lock();
current_addr = block->offset + offset;
if (block == last_sent_block) {
offset |= RAM_SAVE_FLAG_CONTINUE;
}
if (ret != RAM_SAVE_CONTROL_NOT_SUPP) {
if (ret != RAM_SAVE_CONTROL_DELAYED) {
if (bytes_xmit > 0) {
@ -739,6 +738,7 @@ static int ram_find_and_save_block(QEMUFile *f, bool last_stage,
/* if page is unmodified, continue to the next */
if (pages > 0) {
last_sent_block = block;
break;
}
}