Re: NCHNAMLEN vnode cache limitation removal

To: David Holland <dholland-tech%netbsd.org@localhost>
Subject: Re: NCHNAMLEN vnode cache limitation removal
From: Jason Thorpe <thorpej%me.com@localhost>
Date: Wed, 11 Sep 2019 09:43:18 +0300

> On Sep 11, 2019, at 8:18 AM, David Holland <dholland-tech%netbsd.org@localhost> wrote:
> 
> I'm confused; nothing in there should lead to duplicate entries...

Duplicate names != duplicate entries.

Consider the case:

bin/CVS
bin/cat/CVS
.
.
.
bin/sh/CVS
.
.
.

Distinct vnodes, with distinct parents, all having the same name.

Another advantage of de-duping the name strings is that you can compare names by testing pointer equivalence.

-- thorpej

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References:
- NCHNAMLEN vnode cache limitation removal
  - From: Christos Zoulas
- Re: NCHNAMLEN vnode cache limitation removal
  - From: Jason Thorpe
- Re: NCHNAMLEN vnode cache limitation removal
  - From: David Holland

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