Re: kfree(NULL)

[Daniel Walker]

On Fri, 2006-04-21 at 03:22 -0400, James Morris wrote:
> On Fri, 21 Apr 2006, Daniel Walker wrote:
> 
> > 	I included a patch , not like it's needed . Recently I've been
> > evaluating likely/unlikely branch prediction .. One thing that I found 
> > is that the kfree function is often called with a NULL "objp" . In fact
> > it's so frequent that the "unlikely" branch predictor should be inverted!
> > Or at least on my configuration. 
> 
> It would be helpful to collect some stats on this so we can look at the 
> ratio.

On my system it was roughly 31 million kfree(NULL) calls, to 4 million
calls with other values . That was over 4 hours of run time .

Daniel

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