Re: [PATCH] Radix-tree pagecache for 2.5

[Jeff Garzik]

On Fri, Feb 01, 2002 at 09:06:37AM -0800, Linus Torvalds wrote:
> Even databases often use multiple files, and quite frankly, a database
> that doesn't use mmap and doesn't try very hard to not cause extra system
> calls is going to be bad performance-wise _regardless_ of any page cache
> locking.

I've always thought that read(2) and write(2) would in the end wind up
faster than mmap(2)...  Tests in my rewritten cp/rm/mv type utilities
seem to bear this out.

Is mmap(2) only preferred for large files/databases?

	Jeff