linux-kernel - Re: [PATCH RESEND] Fix a dead loop in async_synchronize

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Message-ID: <CABE8wwsqyo=BPCy4xy1PAVKFWe=GqYRdYowXkQ6UZoXdtEdCZA@mail.gmail.com>
Date:	Wed, 11 Jul 2012 15:50:43 -0700
From:	Dan Williams <dan.j.williams@...el.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Li Zhong <zhong@...ux.vnet.ibm.com>,
	LKML <linux-kernel@...r.kernel.org>, arjan@...ux.intel.com,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Christian Kujau <lists@...dbynature.de>,
	Cong Wang <xiyou.wangcong@...il.com>
Subject: Re: [PATCH RESEND] Fix a dead loop in async_synchronize_full()

On Wed, Jul 11, 2012 at 3:42 PM, Andrew Morton
<akpm@...ux-foundation.org> wrote:
> The patch is fairly wordwrapped - please fix up your email client.
>
> More seriously, it does not apply to linux-next due to some fairly
> significant changes which have been sitting in Dan's tree since May.
> What's going on?
>

Those changes missed the 3.5 merge window, but now that they have
Arjan's ack they should head upstream via James for 3.6.  Right now
they are on his pending [1] branch.

As far as the comment:

> It seems async_synchronize_full() wants to synchronize all entries in
> all running lists(domains), so maybe we could just check the entry_count
> to know whether all works are finished.

...at first glance this is what the new async patches achieve.
async_synchronize_full should now sync work across all domains, but if
you can reproduce this bug it would be nice to confirm that the
pending changes fix it.

--
Dan

[1]: http://git.kernel.org/?p=linux/kernel/git/jejb/scsi.git;a=shortlog;h=refs/heads/pending
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