linux-kernel - Re: [PATCH] virtio_blk: add helper function to support mass of disks naming

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Date:	Thu, 29 Mar 2012 14:03:55 +0200
From:	Jens Axboe <axboe@...nel.dk>
To:	Ren Mingxin <renmx@...fujitsu.com>
CC:	"Michael S. Tsirkin" <mst@...hat.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	LKML <linux-kernel@...r.kernel.org>, Tejun Heo <tj@...nel.org>,
	kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org,
	linux-scsi@...r.kernel.org
Subject: Re: [PATCH] virtio_blk: add helper function to support mass of disks
 naming

On 03/29/2012 07:36 AM, Ren Mingxin wrote:
>  On 03/28/2012 06:58 PM, Michael S. Tsirkin wrote:
>> On Wed, Mar 28, 2012 at 02:54:43PM +0800, Ren Mingxin wrote:
>>>   Hi,
>>>
>>> The current virtblk's naming algorithm just supports 26^3
>>> disks. If there are mass of virtblks(exceeding 26^3), there
>>> will be disks with the same name.
>>>
>>> According to "sd_format_disk_name()", I add function
>>> "virtblk_name_format()" for virtblk to support mass of
>>> disks.
>>>
>>> Signed-off-by: Ren Mingxin<renmx@...fujitsu.com>
>> Nod. This is basically what 3e1a7ff8a0a7b948f2684930166954f9e8e776fe
>> did. Except, maybe we should move this function into block core
>> instead of duplicating it? Where would be a good place to put it?
> 
> Yes, this was also what I thought.
> 
> How about placing the "sd_format_disk_name()"
> as "disk_name_format()" into "block/genhd.c"
> ("include/linux/genhd.h")?

Yes, that sounds like the appropriate solution (and name, and where to
put it).

-- 
Jens Axboe

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