Date: Tue, 9 Jan 2018 17:20:19 +0100
From: Peter Zijlstra <peterz@infradead.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: Vince Weaver <vincent.weaver@maine.edu>,
        linux-kernel@vger.kernel.org, Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Steven Rostedt <rostedt@goodmis.org>
Subject: Re: perf: perf_fuzzer quickly locks up on 4.15-rc7
Message-ID: <20180109162019.GL3040@hirez.programming.kicks-ass.net>
References: <alpine.DEB.2.21.1801081105570.319@macbook-air>
 <20180108173005.lkglqrixb2ota6g2@gmail.com>
 <alpine.DEB.2.21.1801081528110.14364@macbook-air>
 <20180109102507.GG6176@hirez.programming.kicks-ass.net>
 <20180109132602.GA2369@hirez.programming.kicks-ass.net>
 <alpine.DEB.2.21.1801090841300.15884@macbook-air>
 <20180109151253.GK6176@hirez.programming.kicks-ass.net>
 <alpine.DEB.2.21.1801091022040.16446@macbook-air>
 <20180109153341.GL6176@hirez.programming.kicks-ass.net>
 <20180109161606.etvacvfe6rq777ps@gmail.com>
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On Tue, Jan 09, 2018 at 05:16:06PM +0100, Ingo Molnar wrote:
> > +	force_early_printk
> > +			Forcefully uses early_console (as per earlyprintk=)
> > +			usage for regular printk, bypassing everything,
> > +			including the syslog (dmesg will be empty).
> 
> BTW., this looks very useful - please consider pushing it upstream if it does not 
> hurt any of the other syslog usecases.

I've posted it a number of times, the printk people didn't hate it but
haven't merged it either. Instead they continue working on making it a
bigger trainwreck...

I'll post it again later when we're not chasing spectres and meltdowns.