linux-kernel - Re: JFFS2 deadlock

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Message-ID: <OF7C1394C5.2BBD0A26-ONC1257F48.002BF506-C1257F48.002D6C9C@rohde-schwarz.com>
Date:	Thu, 28 Jan 2016 09:16:08 +0100
From:	Thomas.Betker@...de-schwarz.com
To:	computersforpeace@...il.com
Cc:	Artem Bityutskiy <dedekind1@...il.com>,
	Deng Chao <deng.chao1@....com.cn>,
	David Woodhouse <dwmw2@...radead.org>,
	Joakim Tjernlund <Joakim.Tjernlund@...inera.com>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	"linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
	"linux-mtd" <linux-mtd-bounces@...ts.infradead.org>,
	Ming Liu <liu.ming50@...il.com>,
	"sztomi89@...il.com" <sztomi89@...il.com>,
	Thomas Betker <thomas.betker@...enet.de>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	wangzaiwei <wangzaiwei@...-vision.cn>
Subject: Re: JFFS2 deadlock

Hello Brian:

> No, I'm pretty sure this is not the first report. I think there have
> even been patches. The problem is that JFFS2 is effectively
> unmaintained, despite what MAINTAINERS has to say about it.
> 
> Previous reports:
> 
> Subject: Another JFFS2 deadlock, kernel 3.4.11
> http://thread.gmane.org/gmane.linux.drivers.mtd/62523
> 
> Subject: [JFFS2] Revision "jffs2: Fix lock acquisition order bug in
> jffs2_write_begin" introduces another dead lock.
> http://thread.gmane.org/gmane.linux.drivers.mtd/47986

> For reference: outstanding patches, waiting for a maintainer (I've been
> keeping patchwork up-to-date, mostly, but I'm not touching JFFS2 myself,
> for the most part):
> http://patchwork.ozlabs.org/project/linux-mtd/list/?q=jffs2

Subject: [PATCH] Revert "jffs2: Fix lock acquisition order bug in 
jffs2_write_begin"
http://article.gmane.org/gmane.linux.drivers.mtd/62951

This is a patch revising my original patch, which I sent to linux-mtd on 
10-Nov-2015. I didn't see a response yet, but it's one of the outstanding 
patches above.

Best regards,
Thomas