linux-kernel - Re: [PATCH] block: Revert "[SCSI] genhd: add a new attribute "alias" in gendisk"

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Date:	Thu, 10 Nov 2011 16:21:49 -0500
From:	Jeff Garzik <jeff@...zik.org>
To:	Tejun Heo <tj@...nel.org>
CC:	Jens Axboe <axboe@...nel.dk>,
	"James E.J. Bottomley" <James.Bottomley@...senPartnership.com>,
	Nao Nishijima <nao.nishijima.xt@...achi.com>,
	Kay Sievers <kay.sievers@...y.org>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Alan Cox <alan@...ux.intel.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org
Subject: Re: [PATCH] block: Revert "[SCSI] genhd: add a new attribute "alias"
 in gendisk"

On 11/09/2011 11:25 AM, 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@...nel.org>
> Cc: Jens Axboe<axboe@...nel.dk>
> Cc: "James E.J. Bottomley"<James.Bottomley@...senPartnership.com>
> Cc: Nao Nishijima<nao.nishijima.xt@...achi.com>
> Cc: Kay Sievers<kay.sievers@...y.org>
> Cc: Greg Kroah-Hartman<gregkh@...e.de>
> Cc: Alan Cox<alan@...ux.intel.com>
> Cc: Al Viro<viro@...iv.linux.org.uk>

Acked-by: Jeff Garzik <jgarzik@...hat.com>


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