diff options
Diffstat (limited to 'bitmap.c')
-rw-r--r-- | bitmap.c | 11 |
1 files changed, 11 insertions, 0 deletions
@@ -341,6 +341,17 @@ int CreateBitmap(char *filename, int force, char uuid[16], return rv; } + if (chunksize == UnSet) { + /* We don't want more than 2^21 chunks, as 2^11 fill up one + * 4K page (2 bytes per chunk), and 2^10 address of those + * fill up a 4K indexing page. 2^20 might be safer... + */ + chunksize = DEFAULT_BITMAP_CHUNK; + /* <<21 for 2^21 chunks, >>9 to convert bytes to sectors */ + while (array_size > (chunksize << (21-9))) + chunksize <<= 1; + } + memset(&sb, 0, sizeof(sb)); sb.magic = BITMAP_MAGIC; sb.version = major; |