diff options
Diffstat (limited to 'storage/myisam')
| -rw-r--r-- | storage/myisam/mi_dynrec.c | 6 | ||||
| -rw-r--r-- | storage/myisam/mi_packrec.c | 4 |
2 files changed, 6 insertions, 4 deletions
diff --git a/storage/myisam/mi_dynrec.c b/storage/myisam/mi_dynrec.c index 3433c26f98b..d1cbd6955dd 100644 --- a/storage/myisam/mi_dynrec.c +++ b/storage/myisam/mi_dynrec.c @@ -66,7 +66,7 @@ static int _mi_cmp_buffer(File file, const uchar *buff, my_off_t filepos, my_bool mi_dynmap_file(MI_INFO *info, my_off_t size) { DBUG_ENTER("mi_dynmap_file"); - if (size > (my_off_t) (~((size_t) 0)) - MEMMAP_EXTRA_MARGIN) + if (size > (my_off_t) (~((size_t) 0))) { DBUG_PRINT("warning", ("File is too large for mmap")); DBUG_RETURN(1); @@ -80,7 +80,7 @@ my_bool mi_dynmap_file(MI_INFO *info, my_off_t size) upon a write if no physical memory is available. */ info->s->file_map= (uchar*) - my_mmap(0, (size_t)(size + MEMMAP_EXTRA_MARGIN), + my_mmap(0, (size_t) size, info->s->mode==O_RDONLY ? PROT_READ : PROT_READ | PROT_WRITE, MAP_SHARED | MAP_NORESERVE, @@ -113,7 +113,7 @@ void mi_remap_file(MI_INFO *info, my_off_t size) if (info->s->file_map) { VOID(my_munmap((char*) info->s->file_map, - (size_t) info->s->mmaped_length + MEMMAP_EXTRA_MARGIN)); + (size_t) info->s->mmaped_length)); mi_dynmap_file(info, size); } } diff --git a/storage/myisam/mi_packrec.c b/storage/myisam/mi_packrec.c index be9ce9a0c24..d9abcbce050 100644 --- a/storage/myisam/mi_packrec.c +++ b/storage/myisam/mi_packrec.c @@ -1502,7 +1502,9 @@ my_bool _mi_memmap_file(MI_INFO *info) DBUG_PRINT("warning",("File isn't extended for memmap")); DBUG_RETURN(0); } - if (mi_dynmap_file(info, share->state.state.data_file_length)) + if (mi_dynmap_file(info, + share->state.state.data_file_length + + MEMMAP_EXTRA_MARGIN)) DBUG_RETURN(0); } info->opt_flag|= MEMMAP_USED; |