Re: [PATCH v2 07/32] perf/x86/intel/cqm: add helpers for per-package locking

From	Thomas Gleixner <tglx@linutronix.de>
Newsgroups	linux.kernel
Subject	Re: [PATCH v2 07/32] perf/x86/intel/cqm: add helpers for per-package locking
Date	2016-05-18 21:20 +0200
Message-ID	<rAfaG-6av-21@gated-at.bofh.it> (permalink)
References	<rxLqq-1mv-9@gated-at.bofh.it> <rxLA5-1qt-1@gated-at.bofh.it> <rAdBT-584-3@gated-at.bofh.it>
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On Wed, 18 May 2016, Thomas Gleixner wrote:
> On Wed, 11 May 2016, David Carrillo-Cisneros wrote:

> > +	cqm_pkg_id_for_each_online(i)
> > +		mutex_lock_nested(&cqm_pkgs_data[i]->pkg_data_mutex, i);

Peter just pointed out that this will fail when the number of nest levels
exceeds 8. So any system with more than 8 packages will make lockdep explode.

Thanks,

	tglx

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Re: [PATCH v2 07/32] perf/x86/intel/cqm: add helpers for per-package  locking Thomas Gleixner <tglx@linutronix.de> - 2016-05-18 19:40 +0200
  Re: [PATCH v2 07/32] perf/x86/intel/cqm: add helpers for per-package  locking Thomas Gleixner <tglx@linutronix.de> - 2016-05-18 21:20 +0200

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