linux-kernel - Re: [code] Unlimited partitions, a try

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sat, 6 Oct 2007 00:27:17 +0200 (CEST)
From:	Jan Engelhardt <jengelh@...putergmbh.de>
To:	"H. Peter Anvin" <hpa@...or.com>
cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [code] Unlimited partitions, a try

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_.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/