From: "H. Peter Anvin" <hpa@zytor.com>
To: Joel Becker <Joel.Becker@oracle.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Larger dev_t and major/minor split
Date: Thu, 20 Mar 2003 16:02:06 -0800 [thread overview]
Message-ID: <3E7A567E.3080409@zytor.com> (raw)
In-Reply-To: <20030320234946.GT2835@ca-server1.us.oracle.com>
Joel Becker wrote:
> On Thu, Mar 20, 2003 at 03:06:31PM -0800, H. Peter Anvin wrote:
>
>>Last I checked, all traditional (inode-based) Unix filesystems,
>>including ext2/3 used block pointers for dev_t. There are plenty of
>>block pointers; 60 bytes worth.
>
> They do indeed. But ext2/3 touches that block pointer with
> cpu_to_le32() and friends. It needs fixing at best, and compatability
> work for already existing partitions.
>
A few options:
a) Use an inode flag indicating a large dev_t. This is probably the
best option.
b) Use a sentinel value, e.g. 0xffffffff, to indicate that the major and
minor are in block pointers 1 and 2.
-hpa
next prev parent reply other threads:[~2003-03-20 23:51 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-20 21:42 Larger dev_t and major/minor split H. Peter Anvin
2003-03-20 22:09 ` Joel Becker
2003-03-20 23:06 ` H. Peter Anvin
2003-03-20 23:49 ` Joel Becker
2003-03-21 0:02 ` H. Peter Anvin [this message]
2003-03-20 22:47 ` Greg KH
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