On 22 April 2005 12:59, Bulat Ziganshin wrote:

also while viewing MBlock.c i wonder why you are aligning megablocks to megabyte boundary - may be 8-byte aligning would be enough? megablocks are never copied or allocated as whole, and even in this case aligning to CPU cache line boundary will be enough

Megablocks have to be allocated on a 1Mb boundary because of the way we map addresses to block descriptors: see Bdescr(). Cheers, Simon