From: "H. Peter Anvin" <hpa@zytor.com>
To: Jan Engelhardt <jengelh@computergmbh.de>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [code] Unlimited partitions, a try
Date: Fri, 05 Oct 2007 15:57:59 -0700 [thread overview]
Message-ID: <4706C177.3010100@zytor.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0710060022530.18723@fbirervta.pbzchgretzou.qr>
Jan Engelhardt wrote:
> On Oct 5 2007 15:11, H. Peter Anvin wrote:
>> Jan Engelhardt wrote:
>>> 15 partitions (at least for sd_mod devices) are too few.
>> Now when we have 20-bit minors, can't we simply recycle some of the
>> higher bits for additional partitions, across the board? 63
>> partitions seem to have been sufficient; at least I haven't heard
>> anyone complain about that for 15 years.
>
> GPT allows up to 128 partitions, and the linux partition code currently
> allows for up to MAX_PART (256). Assuming 1048576/128, that would give
> 8192 disks. With dynamic minor allocation and reuse, all that goes away
> and the limit becomes a bit less than 1048576 _partitions_.
Yes, but you're proposing something with substantially higher switch
threshold...
-hpa
next prev parent reply other threads:[~2007-10-05 22:58 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-05 11:50 [code] Unlimited partitions, a try Jan Engelhardt
2007-10-05 22:11 ` H. Peter Anvin
2007-10-05 22:27 ` Jan Engelhardt
2007-10-05 22:57 ` H. Peter Anvin [this message]
2007-10-05 23:29 ` Alan Cox
2007-10-05 23:29 ` H. Peter Anvin
2007-10-06 19:33 ` Bill Davidsen
2007-10-09 18:15 ` Lennart Sorensen
2007-10-06 8:36 ` Alexander E. Patrakov
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