bugs in the qfq packet scheduler
bugs in the qfq packet scheduler
- Subject: bugs in the qfq packet scheduler
- From: Paolo Valente <email@hidden>
- Date: Mon, 20 Oct 2014 10:05:59 +0200
- Unimore-x-sa-score: -2.9
Hi,
I am one of the authors of the qfq packet schedulers (and I hope I am posting this message to the right ml). I have just discovered that qfq has been included also in xnu from a few years. In this respect, this is just to warn you that the version you have merged is buggy.
You can find all the details about these bugs and their fixes in some related threads on lkml. In particular, I fixed most of the bugs that are still present in your version (and those fixes have been committed in Linux). I did not propose at all a few other fixes, because in the meanwhile qfq was replaced by qfq+, my faster variant of qfq.
I hope this information may help (and of course, I am willing to provide more details on demand),
Paolo
--
Paolo Valente
Algogroup
Dipartimento di Fisica, Informatica e Matematica
Via Campi, 213/B
41125 Modena - Italy
homepage: http://algogroup.unimore.it/people/paolo/
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