Re: [PATCH] Performance regression in 2.6.7-rc3

[Nick Piggin]

Herbert Xu wrote:
> Martin J. Bligh <mbligh@xxxxxxxxxxx> wrote:
>
> > How the hell can that have any effect on non-threaded workloads? Perhaps
> > some part of kernel compile *is* multi-threaded. It does seem to get 
>
>
> make(1) with vfork(2) perhaps?

I think balance on clone probably needs to be turned off by default
presently.

It slows down a simple thread creation test by a factor of 7(!) here,
and has quite a few not too difficult to imagine performance problems.

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