Re: Vnode API change: add global vnode cache

[Thor Lancelot Simon <tls%panix.com@localhost>]

On Mon, Apr 07, 2014 at 04:04:28PM +0000, Taylor R Campbell wrote:
>    Date: Mon, 7 Apr 2014 16:44:47 +0100
>    From: Mindaugas Rasiukevicius <rmind%netbsd.org@localhost>
> 
>    One concern though: can you benchmark ./build.sh on a machine with 8 or
>    more CPUs?  I fear that vcache.lock might be a bit contended and we ought
>    to figure out how much.  If the contention is not significant, it should
>    be fine for now.
> 
> I can do this if you really want, but I doubt it'll make a difference
> unless your src and obj trees are spread across multiple different
> types of file systems, because currently for ufs, ufs_ihashlock and
> ufs_hashlock are just as contended as vcache.lock would be.

This will nail people building on tmpfs, no?

Thor