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Date:   Wed, 10 Jun 2020 08:38:33 -0400
From:   Qian Cai <cai@lca.pw>
To:     Thomas Gleixner <tglx@linutronix.de>
Cc:     Peter Zijlstra <peterz@infradead.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Andy Lutomirski <luto@kernel.org>,
        Andrew Cooper <andrew.cooper3@citrix.com>,
        X86 ML <x86@kernel.org>,
        "Paul E. McKenney" <paulmck@kernel.org>,
        Alexandre Chartre <alexandre.chartre@oracle.com>,
        Frederic Weisbecker <frederic@kernel.org>,
        Paolo Bonzini <pbonzini@redhat.com>,
        Sean Christopherson <sean.j.christopherson@intel.com>,
        Masami Hiramatsu <mhiramat@kernel.org>,
        Petr Mladek <pmladek@suse.com>,
        Steven Rostedt <rostedt@goodmis.org>,
        Joel Fernandes <joel@joelfernandes.org>,
        Boris Ostrovsky <boris.ostrovsky@oracle.com>,
        Juergen Gross <jgross@suse.com>,
        Brian Gerst <brgerst@gmail.com>,
        Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
        Josh Poimboeuf <jpoimboe@redhat.com>,
        Will Deacon <will@kernel.org>,
        Tom Lendacky <thomas.lendacky@amd.com>,
        Wei Liu <wei.liu@kernel.org>,
        Michael Kelley <mikelley@microsoft.com>,
        Jason Chen CJ <jason.cj.chen@intel.com>,
        Zhao Yakui <yakui.zhao@intel.com>,
        Alexander Potapenko <glider@google.com>
Subject: Re: [patch V9 10/39] x86/entry: Provide helpers for execute on
 irqstack
Message-ID: <20200610123833.GD954@lca.pw>
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 <87wo4gnetx.fsf@nanos.tec.linutronix.de>
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On Tue, Jun 09, 2020 at 10:50:50PM +0200, Thomas Gleixner wrote:
> Qian,
> 
> Thomas Gleixner <tglx@linutronix.de> writes:
> >> BAD (after oom02)
> >> # cat /sys/kernel/debug/stackdepot/info
> >> Unique stacks: 140476
> >
> > That's indeed odd. I try to reproduce and figure out what really breaks
> > here.
> 
> I checked your config file and I think I know where this comes from. Can
> you plase disable KASAN just for testing purposes and compare before
> after again?

It turns out I'll need a few days to be able to get ahold of those
affected systems again. I'll be reporting back as soon as possible.