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Message-Id: <20150107163915.50a71131faf74e0f75562137@linux-foundation.org>
Date: Wed, 7 Jan 2015 16:39:15 -0800
From: Andrew Morton <akpm@...ux-foundation.org>
To: Chunyan Zhang <chunyan.zhang@...eadtrum.com>
Cc: <ionut.m.alexa@...il.com>, <mark.yang@...eadtrum.com>,
<wei.qiao@...eadtrum.com>, <geng.ren@...eadtrum.com>,
<orson.zhai@...eadtrum.com>, <zhizhou.zhang@...eadtrum.com>,
<ke.wang@...eadtrum.com>, <zhang.lyra@...il.com>,
<linux-kernel@...r.kernel.org>,
Arjan van de Ven <arjan@...radead.org>,
Tejun Heo <tj@...nel.org>
Subject: Re: [PATCH] kernel: async: Fixed the wrong waitting condition of
wait_event
(resend with cc's, sorry)
On Mon, 5 Jan 2015 11:35:35 +0800 Chunyan Zhang <chunyan.zhang@...eadtrum.com> wrote:
> This patch changes the waitting condition of wait_event in the
> function 'async_synchronize_cookie_domain'.
>
> This function waits until all asynchronous function calls for the certain
> domain have been done.
>
> But, the function 'lowest_in_progress' returns the lowest *pending*
> entry's cookie.
>
> So we should make sure that the return value of lowest_in_progress(domain)
> must be larger than @cookie.
I'm having runtime problems with this. Twice the kernel silently hangs
late in initcalls and the third time I got a great stream of oopses.
I'll drop it. Hopefully you'll be able to work through the bug with
Arjan and Tejun.
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