From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ren Mingxin <renmx@cn.fujitsu.com>
Subject: Re: [PATCH 4/4] virtio_blk: use disk_name_format() to support mass
 of disks naming
Date: Sat, 31 Mar 2012 09:14:26 +0800
Message-ID: <4F765A72.6090006@cn.fujitsu.com>
References: <4F7581D4.4040301@cn.fujitsu.com> <4F7582B0.5010609@cn.fujitsu.com> <CAFO3S427vWXHBDaRmfwqZrGZ2Y8RPUn7CQswQou9EGMh43jU8Q@mail.gmail.com>
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Cc: Jens Axboe <axboe@kernel.dk>,
	"Michael S. Tsirkin" <mst@redhat.com>,
	Rusty Russell <rusty@rustcorp.com.au>,
	Tejun Heo <tj@kernel.org>, LKML <linux-kernel@vger.kernel.org>,
	SCSI <linux-scsi@vger.kernel.org>, KVM <kvm@vger.kernel.org>,
	VIRTUAL <virtualization@lists.linux-foundation.org>
To: Asias He <asias.hejun@gmail.com>
Return-path: <linux-scsi-owner@vger.kernel.org>
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  Hi, He:

On 03/30/2012 07:22 PM, Asias He wrote:
> On Fri, Mar 30, 2012 at 5:53 PM, Ren Mingxin<renmx@cn.fujitsu.com>  wrote:
>>   The current virtblk's naming algorithm only supports 263  disks.
>> If there are mass of virtblks(exceeding 263), there will be disks
>> with the same name.
> This fix is pretty nice. However, current virtblk's naming still
> supports up to 18278 disks, no?
> ( index 0  ->  vda, index 18277 ->  vdzzz ).

Sorry, I intended to type 26^3+ (26^2+26)...
It may still be a restriction which should be improved though.

Thanks,
Ren