From: Mark Lord <kernel@teksavvy.com>
To: Ted Ts'o <tytso@mit.edu>,
Linux Kernel <linux-kernel@vger.kernel.org>,
linux-ext4@vger.kernel.org
Subject: Re: CONFIG_EXT4_USE_FOR_EXT23: rootfs shows as ext2 instead of ext4
Date: Wed, 13 Apr 2011 10:10:06 -0400 [thread overview]
Message-ID: <4DA5AEBE.6060705@teksavvy.com> (raw)
In-Reply-To: <20110413004938.GE3682@thunk.org>
On 11-04-12 08:49 PM, Ted Ts'o wrote:
> On Tue, Apr 12, 2011 at 01:25:08PM -0400, Mark Lord wrote:
>> Ted et al.
>>
>> I've only just noticed this, so I have no idea how long it has been this way.
>>
>> When I build a kernel with CONFIG_EXT4_USE_FOR_EXT23=y and boot from it,
>> the ext4 root filesystem shows up as "ext2" mode, rather than "ext4".
>>
>> This looks very wrong to me, and quite dangerous.
>
> It's a cosemtic bug, I agree, but I'm not sure why you consider it
> dangerous.
It is dangerous if it really has mounted an ext4 as ext2;
the on-disk formats are not 100% compatible.
I don't know what it is doing, so it looks quite dangerous.
Perhaps it really did mount as ext4 though, in which case not.
Thanks.
next prev parent reply other threads:[~2011-04-13 14:10 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-12 17:25 CONFIG_EXT4_USE_FOR_EXT23: rootfs shows as ext2 instead of ext4 Mark Lord
2011-04-13 0:49 ` Ted Ts'o
2011-04-13 14:05 ` Mark Lord
2011-04-13 14:10 ` Mark Lord [this message]
2011-04-13 21:00 ` Theodore Tso
2011-04-13 22:30 ` Joel Becker
2011-04-14 15:41 ` [PATCH] ext4: register ext2 and ext3 alias after ext4 Milton Miller
2011-04-14 15:41 ` [PATCH] fs: synchronize_rcu when unregister_filesystem success not failure Milton Miller
2011-04-14 15:52 ` Linus Torvalds
2011-04-14 16:59 ` Marco Stornelli
2011-04-15 0:49 ` Mark Lord
2011-04-15 1:07 ` [PATCH] ext4: register ext2 and ext3 alias after ext4 Mark Lord
2011-04-17 2:01 ` Ted Ts'o
2011-04-14 1:34 ` CONFIG_EXT4_USE_FOR_EXT23: rootfs shows as ext2 instead of ext4 Mark Lord
2011-04-14 12:47 ` Theodore Tso
2011-04-14 12:47 ` Theodore Tso
2011-04-13 16:45 ` John Stoffel
2011-04-13 18:17 ` Ric Wheeler
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