linux-ext4 - Re: [PATCH] ext3: Remove the obsolete broken EXT3_IOC32_WAIT_FOR

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Date:	Sat, 8 Oct 2011 16:52:35 -0400
From:	Ted Ts'o <tytso@....edu>
To:	Jan Kara <jack@...e.cz>
Cc:	Tao Ma <tm@....ma>, linux-ext4@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] ext3: Remove the obsolete broken
 EXT3_IOC32_WAIT_FOR_READONLY.

On Sat, Oct 08, 2011 at 12:12:33AM +0200, Jan Kara wrote:
> On Fri 07-10-11 23:21:18, Tao Ma wrote:
> > From: Tao Ma <boyu.mt@...bao.com>
> > 
> > There are no user of EXT3_IOC32_WAIT_FOR_READONLY and also it is
> > broken. No one set the set_ro_timer, no one wake up us and our
> > state is set to TASK_INTERRUPTIBLE not RUNNING. So remove it.
>   Hmm, I vaguely recall Andrew had some debugging patches which were using
> turn_ro_timer and this functionality. But I'm not sure if they are still
> usable or if they still make sense when one can easily test crashing using
> virtual machines... Andrew?

That's why I decided to accept the corresponding patch for ext4; if
the rest of debugging patch is out-of-tree, then might as well have it
all out-of-tree --- and killall qemu is probably a better way of
testing this anyway.

							- Ted
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