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SubjectRe: 1.2.13 v 1.3.81 open() speed results

On Tue, 16 Apr 1996, Leonard N. Zubkoff wrote:

> If someone would kindly point me at the kernel profiling app, I will
> recompile and profile the kernel.
> Don't bother. I'm 99.99% certain you'll find that get_empty_inode is the
> loser. I've already reported this and run some profiles for Linus...

Good, I had a cursory look at the fileopen code; is there any profit on
the old idea of a 'half open' chain. This was a George 3 idea which
effectively hid 'closed' files on double headed chain of finite length.
This provided a secondary cache of highly reusable files such directories.

The idea of course is to search the 'half open' chain for a filename first.


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