Re: The reason to call it 3.0 is the desktop (was Re: [OT] 2.6 not 3.0

[Andrew Morton]

Daniel Phillips wrote:
> 
> This is easy to verify: say you have 100 MB of kernel source stored in, say,
> 50 different clumps on disk.

Disks use segmentation on their readahead buffers.  Typically four-way.
So they will only buffer four different chunks of disk at a time.

If you're reading from 50 different places on disk, the disk keeps
invalidating readahead at the segment level.