diff options
Diffstat (limited to 'bitmap.c')
-rw-r--r-- | bitmap.c | 7 |
1 files changed, 4 insertions, 3 deletions
@@ -345,11 +345,12 @@ int CreateBitmap(char *filename, int force, char uuid[16], 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... + * fill up a 4K indexing page. 2^20 might be safer, especially + * on 64bit hosts, so use that. */ chunksize = DEFAULT_BITMAP_CHUNK; - /* <<21 for 2^21 chunks, >>9 to convert bytes to sectors */ - while (array_size > (chunksize << (21-9))) + /* <<20 for 2^20 chunks, >>9 to convert bytes to sectors */ + while (array_size > (chunksize << (20-9))) chunksize <<= 1; } |