linux-kernel - Hard lockups under high CPU load with DynTicks

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Message-ID: <CAHbf0-HyGUPcc14HwBjmQnQV9Mauxur3=5O_MqyGmiV9NK4Pnw@mail.gmail.com>
Date:	Tue, 23 Sep 2014 08:32:02 +0100
From:	Mike Lothian <mike@...eburn.co.uk>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Hard lockups under high CPU load with DynTicks - RCU Related?

Hi

I've raised https://bugzilla.kernel.org/show_bug.cgi?id=84131 and
attempted to bisect

The bug I'm stumbling on happens on both and Intel Sandybridge and AMD
Kabini system - it manifests itself as a hard lockup when the system
is under high load

If I switch off DynTicks the problem doesn't happen - I bisected by
compiling Chromium marking each one good or bad if the system starts
to lockup

I'm not sure if I've filed the bug under the right Product / Component

Please let me know if you'd like any more diagnostics

Cheers

Mike
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