Re: negative dentry_stat.nr_unused causes aggressive dcache pruning

[Greg Banks]

On Wed, Dec 08, 2004 at 04:16:52PM -0600, Steve Lord wrote:
> 
> I have seen this stat go negative (just from booting up a multi cpu box),
> and looking at the code, it is manipulated without locking in a number
> of places. I have only seen this in real life on a 2.4 kernel, but 2.6
> also looks vulnerable.

On early 2.6.x, a heavy streaming NFS load was a great way to trigger
this.  I haven't seen it happen since

http://linus.bkbits.net:8080/linux-2.5/cset@40b8cf606MV-gl6VpDyWKzzW1jaIJw

Greg.
-- 
Greg Banks, R&D Software Engineer, SGI Australian Software Group.
I don't speak for SGI.
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