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migration: Fix regression with compression threads

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Compression threads got broken on commit

  commit 2479569466
  Author: Juan Quintela <quintela@redhat.com>
  Date:   Tue Mar 21 11:45:01 2017 +0100

      ram: reorganize last_sent_block

On do_compress_ram_page() we use a different QEMUFile than the
migration one.  We need to pass it there.  The failure can be seen as:

(qemu) qemu-system-x86_64: Unknown combination of migration flags: 0
qemu-system-x86_64: error while loading state section id 3(ram)
qemu-system-x86_64: load of migration failed: Invalid argument

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Tested-by: Peter Xu <peterx@redhat.com>
This commit is contained in:
Juan Quintela 2017-05-10 13:28:13 +02:00
parent cdece0467c
commit 2bf3aa85f0
1 changed files with 10 additions and 9 deletions
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19
migration/ram.c
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@ -436,20 +436,21 @@ void migrate_compress_threads_create(void)
* @offset: offset inside the block for the page
* in the lower bits, it contains flags
*/
static size_t save_page_header(RAMState *rs, RAMBlock *block, ram_addr_t offset)
static size_t save_page_header(RAMState *rs, QEMUFile *f, RAMBlock *block,
ram_addr_t offset)
{
size_t size, len;
if (block == rs->last_sent_block) {
offset |= RAM_SAVE_FLAG_CONTINUE;
}
qemu_put_be64(rs->f, offset);
qemu_put_be64(f, offset);
size = 8;
if (!(offset & RAM_SAVE_FLAG_CONTINUE)) {
len = strlen(block->idstr);
qemu_put_byte(rs->f, len);
qemu_put_buffer(rs->f, (uint8_t *)block->idstr, len);
qemu_put_byte(f, len);
qemu_put_buffer(f, (uint8_t *)block->idstr, len);
size += 1 + len;
rs->last_sent_block = block;
}
@ -571,7 +572,7 @@ static int save_xbzrle_page(RAMState *rs, uint8_t **current_data,
}
/* Send XBZRLE based compressed page */
bytes_xbzrle = save_page_header(rs, block,
bytes_xbzrle = save_page_header(rs, rs->f, block,
offset | RAM_SAVE_FLAG_XBZRLE);
qemu_put_byte(rs->f, ENCODING_FLAG_XBZRLE);
qemu_put_be16(rs->f, encoded_len);
@ -745,7 +746,7 @@ static int save_zero_page(RAMState *rs, RAMBlock *block, ram_addr_t offset,
if (is_zero_range(p, TARGET_PAGE_SIZE)) {
rs->zero_pages++;
rs->bytes_transferred +=
save_page_header(rs, block, offset | RAM_SAVE_FLAG_COMPRESS);
save_page_header(rs, rs->f, block, offset | RAM_SAVE_FLAG_COMPRESS);
qemu_put_byte(rs->f, 0);
rs->bytes_transferred += 1;
pages = 1;
@ -834,7 +835,7 @@ static int ram_save_page(RAMState *rs, PageSearchStatus *pss, bool last_stage)
/* XBZRLE overflow or normal page */
if (pages == -1) {
rs->bytes_transferred += save_page_header(rs, block,
rs->bytes_transferred += save_page_header(rs, rs->f, block,
offset | RAM_SAVE_FLAG_PAGE);
if (send_async) {
qemu_put_buffer_async(rs->f, p, TARGET_PAGE_SIZE,
@ -860,7 +861,7 @@ static int do_compress_ram_page(QEMUFile *f, RAMBlock *block,
int bytes_sent, blen;
uint8_t *p = block->host + (offset & TARGET_PAGE_MASK);
bytes_sent = save_page_header(rs, block, offset |
bytes_sent = save_page_header(rs, f, block, offset |
RAM_SAVE_FLAG_COMPRESS_PAGE);
blen = qemu_put_compression_data(f, p, TARGET_PAGE_SIZE,
migrate_compress_level());
@ -991,7 +992,7 @@ static int ram_save_compressed_page(RAMState *rs, PageSearchStatus *pss,
pages = save_zero_page(rs, block, offset, p);
if (pages == -1) {
/* Make sure the first page is sent out before other pages */
bytes_xmit = save_page_header(rs, block, offset |
bytes_xmit = save_page_header(rs, rs->f, block, offset |
RAM_SAVE_FLAG_COMPRESS_PAGE);
blen = qemu_put_compression_data(rs->f, p, TARGET_PAGE_SIZE,
migrate_compress_level());