netdev - Re: kernel panic in qdisc_match_from

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Message-ID: <alpine.LNX.2.00.1608162150110.22028@cbobk.fhfr.pm>
Date:	Tue, 16 Aug 2016 21:51:10 +0200 (CEST)
From:	Jiri Kosina <jikos@...nel.org>
To:	David Ahern <dsa@...ulusnetworks.com>
cc:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Simon Horman <simon.horman@...ronome.com>
Subject: Re: kernel panic in qdisc_match_from_root starting openvswitch

On Tue, 16 Aug 2016, Jiri Kosina wrote:

> > I am hitting a kernel panic with '/etc/init.d/openvswitch-switch 
> > restart' Stack trace below. Reverting 59cc1f61f09c ("net: sched: convert 
> > qdisc linked list to hashtable") clears the problem.
> 
> Thanks a lot for the report. Could you please test either with the 
> attached two patches applied on top of net-next, or alternatively with 
> 'might-rebase/net-sched-qdiscs' branch of
> 
> 	git://git.kernel.org/pub/scm/linux/kernel/git/jikos/jikos.git
> 
> (HEAD of that branch is 60b3487ad7f) and report back to me whether it 
> fixes any issues you are seeing? Applying the attached patches on top of 
> net-next or testing with the git branch above should be equivalent test 
> wrt. qdiscs.

And this time hopefully with the actual patches ... 

-- 
Jiri Kosina
SUSE Labs

View attachment "0001-net-sched-fix-handling-of-singleton-qdiscs-with-qdis.patch" of type "TEXT/x-patch" (4776 bytes)

View attachment "0002-net-sched-avoid-duplicates-in-qdisc-dump.patch" of type "TEXT/x-patch" (1871 bytes)