Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934122AbdDFQu5 (ORCPT ); Thu, 6 Apr 2017 12:50:57 -0400 Received: from mx2.suse.de ([195.135.220.15]:38216 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933468AbdDFQuv (ORCPT ); Thu, 6 Apr 2017 12:50:51 -0400 Date: Thu, 6 Apr 2017 09:50:39 -0700 From: Davidlohr Bueso To: Laurent Dufour Cc: mingo@kernel.org, peterz@infradead.org, akpm@linux-foundation.org, jack@suse.cz, kirill.shutemov@linux.intel.com, mhocko@suse.com, mgorman@techsingularity.net, linux-kernel@vger.kernel.org, Davidlohr Bueso Subject: Re: [PATCH 2/6] locking: Introduce range reader/writer lock Message-ID: <20170406165039.GA30318@linux-80c1.suse> References: <20170406084620.22700-1-dave@stgolabs.net> <20170406084620.22700-3-dave@stgolabs.net> <2a5c78b9-23ac-3b81-71ee-6a88b965f859@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: <2a5c78b9-23ac-3b81-71ee-6a88b965f859@linux.vnet.ibm.com> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 183 Lines: 6 On Thu, 06 Apr 2017, Laurent Dufour wrote: >How is 'seqnum' wrapping handled here ? >I'd rather see something like time_before() here, isn't it ? Its a 64bit counter, no overflows.