svn commit: r200184 - stable/8/sbin/ipfw

Brooks Davis brooks at FreeBSD.org
Mon Dec 7 21:06:42 UTC 2009


On Mon, Dec 07, 2009 at 02:17:44PM -0600, Brooks Davis wrote:
> On Sun, Dec 06, 2009 at 07:01:33PM +0000, Luigi Rizzo wrote:
> > Author: luigi
> > Date: Sun Dec  6 19:01:33 2009
> > New Revision: 200184
> > URL: http://svn.freebsd.org/changeset/base/200184
> > 
> > Log:
> >   mfc r200056
> >     use qsort_r instead of heapsort;
> 
> This seems like a move in the wrong direction.  The use of a recursive
> algorithm in the kernel seems generally ill-advised and I was rather
> disturbed when I found we had a quick sort implementation in libkern.
> 
> Unless you know the number of items is small, quick sort isn't safe and
> if the number is small, heap sort is plenty efficient.

Woops, it was pointed out to me that this was the userspace part where
qsort is just fine. :)

-- Brooks
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