Tim Kientzle kientzle at
Wed Mar 3 16:28:20 UTC 2010

Adrian Chadd wrote:
> On 21 February 2010 02:20, Adrian Chadd <adrian at> wrote:
>> Oh I know that! I'm just saying that I may try lzma'ing the kernel and
>> rootfs's to see what kind of savings I get over gzip. :)
> The answer is "whoa". 24 megabyte compressed kernel + MDROOT drops to
> 6.5 megabytes with gzip -9 and a few bytes shy of 5 megabytes with a
> default lzma compress.

Interesting question:  What is the impact on boot speed?
It could be a lot faster to load 5MB from disk and
decompress to a 24MB image than to wait for 24MB from

> This is +1 for GEOM_ULZMA too if it's as effective for the mfs itself.
> I'll toy with that later.

Let us know what you find.


More information about the freebsd-hackers mailing list