netdev - Re: ppp/pppoe, still panic 4.15.3 in ppp

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Message-ID: <20180223100710.GF1322@alphalink.fr>
Date:   Fri, 23 Feb 2018 11:07:10 +0100
From:   Guillaume Nault <g.nault@...halink.fr>
To:     Denys Fedoryshchenko <nuclearcat@...learcat.com>
Cc:     Cong Wang <xiyou.wangcong@...il.com>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        netdev-owner@...r.kernel.org
Subject: Re: ppp/pppoe, still panic 4.15.3 in ppp_push

On Fri, Feb 23, 2018 at 11:41:43AM +0200, Denys Fedoryshchenko wrote:
> On 2018-02-23 11:38, Guillaume Nault wrote:
> > On Thu, Feb 22, 2018 at 08:51:19PM +0200, Denys Fedoryshchenko wrote:
> > > I'm using accel-ppp that has unit-cache option, i guess for
> > > "reusing" ppp
> > > interfaces (because creating a lot of interfaces on BRAS with 8k
> > > users quite
> > > expensive).
> > > Maybe it is somehow related and can be that scenario causing this bug?
> > > 
> > Indeed, it'd be interesting to know if unit-cache is part of the
> > equation (if it's workable for you to disable it).
> Already did that and testing, unfortunately i had to disable KASAN and full
> refcount, as performance hit is too heavy for me. I will try to enable KASAN
> alone tomorrow.
> 
Don't hesitate to post the result even if you can't afford enabling KASAN.