Re: [PATCH 1/3] sysfs directory scaling: rbtree for dirent namelookups

[Greg KH]

On Sun, Nov 01, 2009 at 11:31:30AM -0500, Benjamin LaHaise wrote:
> Use an rbtree in sysfs_dirent to speed up file lookup times
> 
> Systems with large numbers (tens of thousands and more) of network 
> interfaces stress the sysfs code in ways that make the linear search for 
> a name match take far too long.  Avoid this by using an rbtree.

What kind of speedups are you seeing here?  And do these changes cause a
memory increase due to the structure changes which outweigh the
speedups?

What kind of test are you doing to reproduce this?

thanks,

greg k-h
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