linux-kernel - Re: [BUG] msr-trace.h:42 suspicious rcu_dereference

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Message-ID: <20161121124916.GA12577@krava>
Date:   Mon, 21 Nov 2016 13:49:16 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Steven Rostedt <rostedt@...dmis.org>,
        "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
        linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
        Josh Triplett <josh@...htriplett.org>,
        Andi Kleen <andi@...stfloor.org>,
        Jan Stancek <jstancek@...hat.com>
Subject: Re: [BUG] msr-trace.h:42 suspicious rcu_dereference_check() usage!

On Mon, Nov 21, 2016 at 12:31:31PM +0100, Peter Zijlstra wrote:
> On Mon, Nov 21, 2016 at 12:22:29PM +0100, Jiri Olsa wrote:
> > On Mon, Nov 21, 2016 at 10:42:27AM +0100, Peter Zijlstra wrote:
> > > On Mon, Nov 21, 2016 at 10:34:25AM +0100, Jiri Olsa wrote:
> > > > On Mon, Nov 21, 2016 at 10:28:50AM +0100, Peter Zijlstra wrote:
> > > 
> > > > > I think I prefer something like the below, that only annotates the one
> > > > > RDMSR in question, instead of all of them.
> > > > 
> > > > I was wondering about that, but haven't found RCU_NONIDLE 
> > > 
> > > Its in rcupdate.h ;-)
> > 
> > it was too late in the morning.. ;-) I'm assuming you'll queue this patch.. ?
> 
> Probably, I still have to make pretty the uncore patch from last week,
> and I have a PEBS patch that needs looking at :-)
> 
> BTW, if you have any opinion on that PEBS register set crap, do holler
> :-)
> 
>   lkml.kernel.org/r/20161117171731.GV3157@...ns.programming.kicks-ass.net

ook, will check

thanks,
jirka