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Date:      Wed, 24 Sep 2008 13:47:32 -0400
From:      Jeff Wheelhouse <freebsd-hackers@wheelhouse.org>
To:        John Baldwin <jhb@freebsd.org>
Cc:        freebsd-hackers@freebsd.org
Subject:   Re: Major SMP problems with lstat/namei
Message-ID:  <B7B44FFC-4D5A-40C5-A8F4-8389135401FC@wheelhouse.org>
In-Reply-To: <200809241212.09920.jhb@freebsd.org>
References:  <8185F68B-C443-4891-BEC2-5E3D453DDC93@wheelhouse.org> <200809241212.09920.jhb@freebsd.org>

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On Sep 24, 2008, at 12:12 PM, John Baldwin wrote:
> Shared lookups only work on the NFS client in 6.x.  I'm about to  
> turn them on
> for UFS in HEAD (8.x) and will backport the needed fixes to 7.x  
> after 7.1
> (too risky to merge to 7.x this close to a release).

Testers available, when you get to that.  :-)

> So lookup_shared=1
> isn't going to really help on 6.x unless you are doing it all over  
> NFS.  You
> also want to backport my fix to cache_enter() before using  
> lookup_shared at
> all:

Since it sounds like 6.x is a dead end, we'll focus on 7.x, provided  
we can get it to be stable for us.

Having never used svn, I do need to figure out how to pull the  
specific  patches you referenced, but I'm sure that's not an  
unclimbable mountain. :-)

I appreciate your insight on this, it's very helpful.

Thanks,
Jeff





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