diff options
Diffstat (limited to 'buf/buf0lru.c')
| -rw-r--r-- | buf/buf0lru.c | 112 |
1 files changed, 78 insertions, 34 deletions
diff --git a/buf/buf0lru.c b/buf/buf0lru.c index 08536ea5270..037479f83eb 100644 --- a/buf/buf0lru.c +++ b/buf/buf0lru.c @@ -2531,6 +2531,14 @@ func_exit: Dump the LRU page list to the specific file. */ #define LRU_DUMP_FILE "ib_lru_dump" #define LRU_DUMP_TEMP_FILE "ib_lru_dump.tmp" +#define LRU_OS_FILE_WRITE() \ + os_file_write(LRU_DUMP_FILE, dump_file, buffer, \ + (buffers << UNIV_PAGE_SIZE_SHIFT) & 0xFFFFFFFFUL, \ + (buffers >> (32 - UNIV_PAGE_SIZE_SHIFT)), \ + buffer_size) +#define LRU_DUMP_PAGE_COUNT 1 /* Specifies how many dump pages + should be filled for each hold + of the LRU_list_mutex. */ UNIV_INTERN ibool @@ -2541,23 +2549,30 @@ buf_LRU_file_dump(void) ibool success; byte* buffer_base = NULL; byte* buffer = NULL; + const ulint buffer_size = LRU_DUMP_PAGE_COUNT * UNIV_PAGE_SIZE; buf_page_t* bpage; + buf_page_t* first_bpage; ulint buffers; ulint offset; - ibool ret = FALSE; + ulint pages_written; ulint i; + ulint total_pages; + + /* Sanity test to make sure page size is a multiple of + assumed dump record size */ + ut_a(UNIV_PAGE_SIZE % 8 == 0); for (i = 0; i < srv_n_data_files; i++) { if (strstr(srv_data_file_names[i], LRU_DUMP_FILE) != NULL) { fprintf(stderr, " InnoDB: The name '%s' seems to be used for" - " innodb_data_file_path. For safety, dumping of the LRU list" - " is not being done.\n", LRU_DUMP_FILE); + " innodb_data_file_path. Dumping LRU list is" + " not done for safeness.\n", LRU_DUMP_FILE); goto end; } } - buffer_base = ut_malloc(2 * UNIV_PAGE_SIZE); + buffer_base = ut_malloc(UNIV_PAGE_SIZE + buffer_size); buffer = ut_align(buffer_base, UNIV_PAGE_SIZE); if (!buffer) { fprintf(stderr, @@ -2577,18 +2592,28 @@ buf_LRU_file_dump(void) } buffers = offset = 0; - for (i = 0; i < srv_buf_pool_instances; i++) { buf_pool_t* buf_pool; buf_pool = buf_pool_from_array(i); mutex_enter(&buf_pool->LRU_list_mutex); - bpage = UT_LIST_GET_LAST(buf_pool->LRU); + bpage = first_bpage = UT_LIST_GET_FIRST(buf_pool->LRU); + total_pages = UT_LIST_GET_LEN(buf_pool->LRU); - while (bpage != NULL) { - if (offset == 0) { - memset(buffer, 0, UNIV_PAGE_SIZE); + pages_written = 0; + while (bpage != NULL && (pages_written++ < total_pages)) { + + buf_page_t* next_bpage = UT_LIST_GET_NEXT(LRU, bpage); + + if (next_bpage == first_bpage) { + /* Do not release list mutex here, it will be + released just outside this while loop */ + fprintf(stderr, + "InnoDB: detected cycle in LRU for" + " buffer pool %lu, skipping to next" + " buffer pool.\n", i); + break; } mach_write_to_4(buffer + offset * 4, bpage->space); @@ -2596,52 +2621,71 @@ buf_LRU_file_dump(void) mach_write_to_4(buffer + offset * 4, bpage->offset); offset++; - if (offset == UNIV_PAGE_SIZE/4) { + ut_a(offset <= buffer_size); + if (offset == buffer_size/4) { + mutex_t *next_block_mutex = NULL; + if (srv_shutdown_state != SRV_SHUTDOWN_NONE) { - success = 0; + mutex_exit(&buf_pool->LRU_list_mutex); + success = FALSE; fprintf(stderr, " InnoDB: stopped dumping lru" " pages because of server" " shutdown.\n"); + goto end; + } + + /* While writing file, release buffer pool + mutex but keep the next page fixed so we + don't worry about our list iterator becoming + invalid */ + if (next_bpage) { + next_block_mutex = buf_page_get_mutex( + next_bpage); + + mutex_enter(next_block_mutex); + next_bpage->buf_fix_count++; + mutex_exit(next_block_mutex); + } + mutex_exit(&buf_pool->LRU_list_mutex); + + success = LRU_OS_FILE_WRITE(); + + /* Grab this here so that next_bpage can't + be purged when we drop the fix_count */ + mutex_enter(&buf_pool->LRU_list_mutex); + + if (next_bpage) { + mutex_enter(next_block_mutex); + next_bpage->buf_fix_count--; + mutex_exit(next_block_mutex); } - success = os_file_write(LRU_DUMP_FILE, dump_file, buffer, - (buffers << UNIV_PAGE_SIZE_SHIFT) & 0xFFFFFFFFUL, - (buffers >> (32 - UNIV_PAGE_SIZE_SHIFT)), - UNIV_PAGE_SIZE); + if (!success) { mutex_exit(&buf_pool->LRU_list_mutex); fprintf(stderr, - " InnoDB: cannot write page %lu of %s\n", + " InnoDB: cannot write page" + " %lu of %s\n", buffers, LRU_DUMP_FILE); goto end; } buffers++; offset = 0; - } - bpage = UT_LIST_GET_PREV(LRU, bpage); - } + bpage = next_bpage; + } else { + bpage = UT_LIST_GET_NEXT(LRU, bpage); + } + } /* while(bpage ...) */ mutex_exit(&buf_pool->LRU_list_mutex); - } - - if (offset == 0) { - memset(buffer, 0, UNIV_PAGE_SIZE); - } + } /* for(srv_buf_pool_instances ...) */ mach_write_to_4(buffer + offset * 4, 0xFFFFFFFFUL); offset++; mach_write_to_4(buffer + offset * 4, 0xFFFFFFFFUL); offset++; - success = os_file_write(LRU_DUMP_FILE, dump_file, buffer, - (buffers << UNIV_PAGE_SIZE_SHIFT) & 0xFFFFFFFFUL, - (buffers >> (32 - UNIV_PAGE_SIZE_SHIFT)), - UNIV_PAGE_SIZE); - if (!success) { - goto end; - } - - ret = TRUE; + success = LRU_OS_FILE_WRITE(); end: if (dump_file != -1) { if (success) { @@ -2656,7 +2700,7 @@ end: if (buffer_base) ut_free(buffer_base); - return(ret); + return(success); } typedef struct { |