From: Andrew Morton <akpm@linux-foundation.org>
To: Ed Cashin <ecashin@coraid.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/7] aoe: retain static block device numbers for backwards compatibility
Date: Tue, 2 Oct 2012 14:16:26 -0700 [thread overview]
Message-ID: <20121002141626.4ac3c537.akpm@linux-foundation.org> (raw)
In-Reply-To: <1dd6f0e49b1c1fb151ba57df86bff4b81aa0b258.1349104674.git.ecashin@coraid.com>
On Mon, 1 Oct 2012 19:01:15 -0700
Ed Cashin <ecashin@coraid.com> wrote:
> The old mapping between AoE target shelf and slot addresses and
> the block device minor number is retained as a
> backwards-compatible feature, with a new "aoe_dyndevs" module
> parameter available for enabling dynamic block device minor
> numbers.
OK, so the default behaviour is unchanged and users opt into the new
behaviour by providing this module parameter?
Why is this worth doing? What behaviour changes would users see if we
defaulted to dynamic minors?
I'm surprised we don't have some library code somewhere for managing a
map of minor numbers - it's an operation which is common to so many
drivers. It would be bitmap or IDR based, I expect.
next prev parent reply other threads:[~2012-10-02 21:16 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 [this message]
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
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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