diff options
| -rw-r--r-- | migration/migration.c | 3 | ||||
| -rw-r--r-- | migration/ram.c | 49 | ||||
| -rw-r--r-- | migration/ram.h | 1 |
3 files changed, 36 insertions, 17 deletions
diff --git a/migration/migration.c b/migration/migration.c index beea01ce63..7e5dbd9b92 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -352,9 +352,6 @@ static void process_incoming_migration_co(void *opaque) migrate_decompress_threads_join(); exit(EXIT_FAILURE); } - - free_xbzrle_decoded_buf(); - mis->bh = qemu_bh_new(process_incoming_migration_bh, mis); qemu_bh_schedule(mis->bh); } diff --git a/migration/ram.c b/migration/ram.c index 649f76cb52..73aec34161 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -85,11 +85,10 @@ static struct { QemuMutex lock; /* it will store a page full of zeros */ uint8_t *zero_target_page; + /* buffer used for XBZRLE decoding */ + uint8_t *decoded_buf; } XBZRLE; -/* buffer used for XBZRLE decoding */ -static uint8_t *xbzrle_decoded_buf; - static void XBZRLE_cache_lock(void) { if (migrate_use_xbzrle()) @@ -1350,13 +1349,18 @@ uint64_t ram_bytes_total(void) return total; } -void free_xbzrle_decoded_buf(void) +static void xbzrle_load_setup(void) { - g_free(xbzrle_decoded_buf); - xbzrle_decoded_buf = NULL; + XBZRLE.decoded_buf = g_malloc(TARGET_PAGE_SIZE); } -static void ram_migration_cleanup(void *opaque) +static void xbzrle_load_cleanup(void) +{ + g_free(XBZRLE.decoded_buf); + XBZRLE.decoded_buf = NULL; +} + +static void ram_save_cleanup(void *opaque) { RAMState **rsp = opaque; RAMBlock *block; @@ -2078,11 +2082,6 @@ static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host) int xh_flags; uint8_t *loaded_data; - if (!xbzrle_decoded_buf) { - xbzrle_decoded_buf = g_malloc(TARGET_PAGE_SIZE); - } - loaded_data = xbzrle_decoded_buf; - /* extract RLE header */ xh_flags = qemu_get_byte(f); xh_len = qemu_get_be16(f); @@ -2096,7 +2095,9 @@ static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host) error_report("Failed to load XBZRLE page - len overflow!"); return -1; } + loaded_data = XBZRLE.decoded_buf; /* load data and decode */ + /* it can change loaded_data to point to an internal buffer */ qemu_get_buffer_in_place(f, &loaded_data, xh_len); /* decode RLE */ @@ -2310,6 +2311,26 @@ static void decompress_data_with_multi_threads(QEMUFile *f, } /** + * ram_load_setup: Setup RAM for migration incoming side + * + * Returns zero to indicate success and negative for error + * + * @f: QEMUFile where to receive the data + * @opaque: RAMState pointer + */ +static int ram_load_setup(QEMUFile *f, void *opaque) +{ + xbzrle_load_setup(); + return 0; +} + +static int ram_load_cleanup(void *opaque) +{ + xbzrle_load_cleanup(); + return 0; +} + +/** * ram_postcopy_incoming_init: allocate postcopy data structures * * Returns 0 for success and negative if there was one error @@ -2629,7 +2650,9 @@ static SaveVMHandlers savevm_ram_handlers = { .save_live_complete_precopy = ram_save_complete, .save_live_pending = ram_save_pending, .load_state = ram_load, - .save_cleanup = ram_migration_cleanup, + .save_cleanup = ram_save_cleanup, + .load_setup = ram_load_setup, + .load_cleanup = ram_load_cleanup, }; void ram_mig_init(void) diff --git a/migration/ram.h b/migration/ram.h index 6272eb0007..a8b79a4d4c 100644 --- a/migration/ram.h +++ b/migration/ram.h @@ -47,7 +47,6 @@ void migrate_decompress_threads_join(void); uint64_t ram_pagesize_summary(void); int ram_save_queue_pages(const char *rbname, ram_addr_t start, ram_addr_t len); void acct_update_position(QEMUFile *f, size_t size, bool zero); -void free_xbzrle_decoded_buf(void); void ram_debug_dump_bitmap(unsigned long *todump, bool expected, unsigned long pages); void ram_postcopy_migrated_memory_release(MigrationState *ms); |