linux-kernel - Re: [PATCH v8 1/6] lib/dlock-list: Distributed and lock-protected lists

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Date:   Tue, 31 Oct 2017 14:37:32 -0700
From:   Davidlohr Bueso <dave@...olabs.net>
To:     Waiman Long <longman@...hat.com>
Cc:     Alexander Viro <viro@...iv.linux.org.uk>, Jan Kara <jack@...e.com>,
        Jeff Layton <jlayton@...chiereds.net>,
        "J. Bruce Fields" <bfields@...ldses.org>,
        Tejun Heo <tj@...nel.org>,
        Christoph Lameter <cl@...ux-foundation.org>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Andi Kleen <andi@...stfloor.org>,
        Dave Chinner <dchinner@...hat.com>,
        Boqun Feng <boqun.feng@...il.com>
Subject: Re: [PATCH v8 1/6] lib/dlock-list: Distributed and lock-protected
 lists

On Tue, 31 Oct 2017, Waiman Long wrote:

>+void dlock_lists_del(struct dlock_list_node *node)
>+{
>+	struct dlock_list_head *head;
>+	bool retry;
>+
>+	do {
>+		head = READ_ONCE(node->head);

Boqun had previously pointed this out; you need to WRITE_ONCE() node->head too.

Thanks,
Davidlohr