From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752362AbdB1M1O (ORCPT ); Tue, 28 Feb 2017 07:27:14 -0500 Received: from bombadil.infradead.org ([65.50.211.133]:58473 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751737AbdB1M1M (ORCPT ); Tue, 28 Feb 2017 07:27:12 -0500 Date: Tue, 28 Feb 2017 13:26:54 +0100 From: Peter Zijlstra To: Byungchul Park Cc: mingo@kernel.org, tglx@linutronix.de, walken@google.com, boqun.feng@gmail.com, kirill@shutemov.name, linux-kernel@vger.kernel.org, linux-mm@kvack.org, iamjoonsoo.kim@lge.com, akpm@linux-foundation.org, npiggin@gmail.com Subject: Re: [PATCH v5 06/13] lockdep: Implement crossrelease feature Message-ID: <20170228122654.GF5680@worktop> References: <1484745459-2055-1-git-send-email-byungchul.park@lge.com> <1484745459-2055-7-git-send-email-byungchul.park@lge.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1484745459-2055-7-git-send-email-byungchul.park@lge.com> User-Agent: Mutt/1.5.22.1 (2013-10-16) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jan 18, 2017 at 10:17:32PM +0900, Byungchul Park wrote: > + /* > + * Each work of workqueue might run in a different context, > + * thanks to concurrency support of workqueue. So we have to > + * distinguish each work to avoid false positive. > + * > + * TODO: We can also add dependencies between two acquisitions > + * of different work_id, if they don't cause a sleep so make > + * the worker stalled. > + */ > + unsigned int work_id; I don't understand... please explain.