diff options
Diffstat (limited to 'arch_init.c')
| -rw-r--r-- | arch_init.c | 47 |
1 files changed, 24 insertions, 23 deletions
diff --git a/arch_init.c b/arch_init.c index d30fd137a5..7377a0703e 100644 --- a/arch_init.c +++ b/arch_init.c @@ -305,34 +305,39 @@ uint64_t xbzrle_mig_pages_overflow(void) return acct_info.xbzrle_overflows; } +/* This is the last block that we have visited serching for dirty pages + */ +static RAMBlock *last_seen_block; +/* This is the last block from where we have sent data */ +static RAMBlock *last_sent_block; +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 size_t save_block_hdr(QEMUFile *f, RAMBlock *block, ram_addr_t offset, - int cont, int flag) + int flag) { size_t size; - qemu_put_be64(f, offset | cont | flag); + if (block == last_sent_block) { + offset |= RAM_SAVE_FLAG_CONTINUE; + } + + qemu_put_be64(f, offset | flag); size = 8; - if (!cont) { + if (block != last_sent_block) { 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; } -/* This is the last block that we have visited serching for dirty pages - */ -static RAMBlock *last_seen_block; -/* This is the last block from where we have sent data */ -static RAMBlock *last_sent_block; -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; - /* Update the xbzrle cache to reflect a page that's been sent as all 0. * The important thing is that a stale (not-yet-0'd) page be replaced * by the new data. @@ -370,7 +375,7 @@ static void xbzrle_cache_zero_page(ram_addr_t current_addr) */ static int save_xbzrle_page(QEMUFile *f, uint8_t **current_data, ram_addr_t current_addr, RAMBlock *block, - ram_addr_t offset, int cont, bool last_stage, + ram_addr_t offset, bool last_stage, uint64_t *bytes_transferred) { int encoded_len = 0, bytes_xbzrle; @@ -420,7 +425,7 @@ static int save_xbzrle_page(QEMUFile *f, uint8_t **current_data, } /* Send XBZRLE based compressed page */ - bytes_xbzrle = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_XBZRLE); + bytes_xbzrle = save_block_hdr(f, block, offset, RAM_SAVE_FLAG_XBZRLE); qemu_put_byte(f, ENCODING_FLAG_XBZRLE); qemu_put_be16(f, encoded_len); qemu_put_buffer(f, XBZRLE.encoded_buf, encoded_len); @@ -608,15 +613,12 @@ static int ram_save_page(QEMUFile *f, RAMBlock* block, ram_addr_t offset, { int pages = -1; uint64_t bytes_xmit; - int cont; ram_addr_t current_addr; MemoryRegion *mr = block->mr; uint8_t *p; int ret; bool send_async = true; - cont = (block == last_sent_block) ? RAM_SAVE_FLAG_CONTINUE : 0; - p = memory_region_get_ram_ptr(mr) + offset; /* In doubt sent page as normal */ @@ -641,7 +643,7 @@ static int ram_save_page(QEMUFile *f, RAMBlock* block, ram_addr_t offset, } } else if (is_zero_range(p, TARGET_PAGE_SIZE)) { acct_info.dup_pages++; - *bytes_transferred += save_block_hdr(f, block, offset, cont, + *bytes_transferred += save_block_hdr(f, block, offset, RAM_SAVE_FLAG_COMPRESS); qemu_put_byte(f, 0); *bytes_transferred += 1; @@ -652,7 +654,7 @@ static int ram_save_page(QEMUFile *f, RAMBlock* block, ram_addr_t offset, xbzrle_cache_zero_page(current_addr); } else if (!ram_bulk_stage && migrate_use_xbzrle()) { pages = save_xbzrle_page(f, &p, current_addr, block, - offset, cont, last_stage, bytes_transferred); + offset, last_stage, bytes_transferred); if (!last_stage) { /* Can't send this cached data async, since the cache page * might get updated before it gets to the wire @@ -663,7 +665,7 @@ static int ram_save_page(QEMUFile *f, RAMBlock* block, ram_addr_t offset, /* XBZRLE overflow or normal page */ if (pages == -1) { - *bytes_transferred += save_block_hdr(f, block, offset, cont, + *bytes_transferred += save_block_hdr(f, block, offset, RAM_SAVE_FLAG_PAGE); if (send_async) { qemu_put_buffer_async(f, p, TARGET_PAGE_SIZE); @@ -726,7 +728,6 @@ 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; } } |