linux-kernel - Re: [PATCH 2/6] locking: Introduce range reader/writer lock

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Message-ID: <20170406165039.GA30318@linux-80c1.suse>
Date:   Thu, 6 Apr 2017 09:50:39 -0700
From:   Davidlohr Bueso <dave@...olabs.net>
To:     Laurent Dufour <ldufour@...ux.vnet.ibm.com>
Cc:     mingo@...nel.org, peterz@...radead.org, akpm@...ux-foundation.org,
        jack@...e.cz, kirill.shutemov@...ux.intel.com, mhocko@...e.com,
        mgorman@...hsingularity.net, linux-kernel@...r.kernel.org,
        Davidlohr Bueso <dbueso@...e.de>
Subject: Re: [PATCH 2/6] locking: Introduce range reader/writer lock

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.