Re: [00/41] Large Blocksize Support V7 (adds memmap support)

[JÃrn Engel]

On Tue, 18 September 2007 11:00:40 +0100, Mel Gorman wrote:
> 
> We still lack data on what sort of workloads really benefit from large
> blocks

Compressing filesystems like jffs2 and logfs gain better compression
ratio with larger blocks.  Going from 4KiB to 64KiB gave somewhere
around 10% benefit iirc.  Testdata was a 128MiB qemu root filesystem.

Granted, the same could be achieved by adding some extra code and a few
bounce buffers to the filesystem.  How suck a hack would perform I'd
prefer not to find out, though. :)

JÃrn

-- 
Write programs that do one thing and do it well. Write programs to work
together. Write programs to handle text streams, because that is a
universal interface.
-- Doug MacIlroy
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/