From: Andrew Morton <akpm@linux-foundation.org>
To: Ed Cashin <ecashin@coraid.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH 4/7] aoe: make dynamic block minor numbers the default
Date: Tue, 2 Oct 2012 14:17:34 -0700 [thread overview]
Message-ID: <20121002141734.56ee52b3.akpm@linux-foundation.org> (raw)
In-Reply-To: <4b1456739285d5a7a153ba74a51f3e3bfd5c4a53.1349104674.git.ecashin@coraid.com>
On Mon, 1 Oct 2012 19:05:15 -0700
Ed Cashin <ecashin@coraid.com> wrote:
> Because udev use is so widespread, making the old static mapping
> the default is too conservative, given the severe limitations it
> places on usable AoE addresses. Storage virtualization and
> larger shelves have made the old limitations too confining.
>
> These changes make the dynamic block device minor numbers the
> default, removing the limitations on usable AoE addresses.
>
> The static arrangement is still available with aoe_dyndevs=0, and
> the aoe-stat tool from the userland aoetools package, the user
> space counterpart to the aoe driver, recognizes the case where
> there is a mismatch between the minor number in sysfs and the
> minor number in a special device file.
Oh. There we are.
Again, what are the back-(in)compatibility issues which users might
encounter with this?
next prev parent reply other threads:[~2012-10-02 21:17 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-02 1:59 [PATCH 1/7] aoe: support more AoE addresses with dynamic block device minor numbers Ed Cashin
2012-10-02 2:01 ` [PATCH 2/7] aoe: retain static block device numbers for backwards compatibility Ed Cashin
2012-10-02 21:16 ` Andrew Morton
2012-10-02 2:03 ` [PATCH 3/7] aoe: update and specify AoE address guards and error messages Ed Cashin
2012-10-02 2:05 ` [PATCH 4/7] aoe: make dynamic block minor numbers the default Ed Cashin
2012-10-02 21:17 ` Andrew Morton [this message]
2012-10-02 22:50 ` Ed Cashin
2012-10-02 2:07 ` [PATCH 5/7] aoe: remove unused code Ed Cashin
2012-10-02 2:09 ` [PATCH 6/7] aoe: update documentation to better reflect aoe-plus-udev usage Ed Cashin
2012-10-02 2:11 ` [PATCH 7/7] aoe: update aoe-internal version number to 50 Ed Cashin
2012-10-02 10:30 ` [PATCH 1/7] aoe: support more AoE addresses with dynamic block device minor numbers Ed Cashin
2012-10-02 21:12 ` Andrew Morton
2012-10-03 0:03 ` Ed Cashin
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