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Date: Wed, 1 Apr 2015 09:14:00 -0700
Message-ID: <CA+55aFxQ6q7MNS+4XWZ3=Xa0Hz6kumd84v_aEw3M4gBpXszTkQ@mail.gmail.com>
Subject: Re: smp_call_function_single lockups
From: Linus Torvalds <torvalds@linux-foundation.org>
To: Chris J Arges <chris.j.arges@canonical.com>
Cc: Ingo Molnar <mingo@kernel.org>, Rafael David Tinoco <inaddy@ubuntu.com>,
        Peter Anvin <hpa@zytor.com>, Jiang Liu <jiang.liu@linux.intel.com>,
        Peter Zijlstra <peterz@infradead.org>,
        LKML <linux-kernel@vger.kernel.org>, Jens Axboe <axboe@kernel.dk>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        Gema Gomez <gema.gomez-solano@canonical.com>,
        "the arch/x86 maintainers" <x86@kernel.org>
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On Wed, Apr 1, 2015 at 9:10 AM, Chris J Arges
<chris.j.arges@canonical.com> wrote:
>
> Even with irqbalance removed from the L0/L1 machines the hang still occurs.
>
> This results in no 'apic: vector* or 'ack_APIC*' messages being displayed.

Ok. So the ack_APIC debug patch found *something*, but it seems to be
unrelated to the hang.

Dang. Oh well.  Back to square one.

                           Linus
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