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Date: Wed, 9 Nov 2011 08:53:30 -0800
From: Greg KH <gregkh@suse.de>
To: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>,
        "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>,
        Nao Nishijima <nao.nishijima.xt@hitachi.com>,
        Kay Sievers <kay.sievers@vrfy.org>, Alan Cox <alan@linux.intel.com>,
        Al Viro <viro@zeniv.linux.org.uk>, linux-kernel@vger.kernel.org,
        linux-scsi@vger.kernel.org
Subject: Re: [PATCH] block: Revert "[SCSI] genhd: add a new attribute "alias"
 in gendisk"
Message-ID: <20111109165330.GA13326@suse.de>
References: <20111109162512.GB1260@google.com>
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On Wed, Nov 09, 2011 at 08:25:12AM -0800, Tejun Heo wrote:
> This reverts commit a72c5e5eb738033938ab30d6a634b74d1d060f10.
> 
> The commit introduced alias for block devices which is intended to be
> used during logging although actual usage hasn't been committed yet.
> This approach adds very limited benefit (raw log might be easier to
> follow) which can be trivially implemented in userland but has a lot
> of problems.
> 
> It is much worse than netif renames because it doesn't rename the
> actual device but just adds conveninence name which isn't used
> universally or enforced.  Everything internal including device lookup
> and sysfs still uses the internal name and nothing prevents two
> devices from using conflicting alias - ie. sda can have sdb as its
> alias.
> 
> This has been nacked by people working on device driver core, block
> layer and kernel-userland interface and shouldn't have been
> upstreamed.  Revert it.
> 
>  http://thread.gmane.org/gmane.linux.kernel/1155104
>  http://thread.gmane.org/gmane.linux.scsi/68632
>  http://thread.gmane.org/gmane.linux.scsi/69776
> 
> Signed-off-by: Tejun Heo <tj@kernel.org>
> Cc: Jens Axboe <axboe@kernel.dk>
> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
> Cc: Nao Nishijima <nao.nishijima.xt@hitachi.com>
> Cc: Kay Sievers <kay.sievers@vrfy.org>
> Cc: Greg Kroah-Hartman <gregkh@suse.de>

Acked-by: Greg Kroah-Hartman <gregkh@suse.de>

Thanks for reverting this,

greg k-h