linux-kernel - Re: [PATCH] Driver Core: devtmpfs - kernel-maintained tmpfs-based /dev

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:	Fri, 07 Aug 2009 11:47:24 -0400
From:	Phil Turmel <philip@...mel.org>
To:	Greg KH <gregkh@...e.de>
CC:	David Dillow <dave@...dillows.org>,
	Andi Kleen <andi@...stfloor.org>, Greg KH <greg@...ah.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	linux-kernel@...r.kernel.org, Kay Sievers <kay.sievers@...y.org>,
	Jan Blunck <jblunck@...e.de>, Harald Hoyer <harald@...hat.com>,
	Scott James Remnant <scott@...ntu.com>
Subject: Re: [PATCH] Driver Core: devtmpfs - kernel-maintained tmpfs-based
 /dev

Greg KH wrote:
> On Thu, Aug 06, 2009 at 12:20:58PM -0400, David Dillow wrote:
>> On Thu, 2009-08-06 at 17:46 +0200, Andi Kleen wrote:
>>> Greg KH <greg@...ah.com> writes:
>>>> It makes the userspace boot process much simpler and easier to maintain,
>>>> as well as providing a way to handle rescue disks and images trivially,
>>>> and it makes the kernel _less_ dependant on the early userspace bootup
>>>> scripts.
>>> As a initrd less kernel user I can really only agree: getting rid
>>> of the udev-in-initrd requirement would be a big step forward
>>> in usability. Typically I always have to pre populate 
>>> a on disk /dev manually first to get my kernels to boot.
>> If you use mount by label or UUID, you still need udev (or other tools)
>> in the initrd to find the right disk, correct?
> 
> Yes, you would.
> 

Might be straying off-topic here, but I find software raid to be 
particularly useful in this case.  I've been using it on my home server 
for a few years now, including through the transition from ide to 
libata.  The kernel autostart for md devices has been rock-solid, and 
successfully hides the real device name.  No initramfs required.

You might want to adapt the md+lvm setup from the gentoo docs [1], even 
if you only have one disk (degraded mirror).  The only gotcha I've 
encountered was forgetting to set up grub after replacing a failed disk, 
and it happened to be first in line in the BIOS.  Didn't notice 'till an 
extended power outage forced a reboot.

Phil

[1] http://www.gentoo.org/doc/en/gentoo-x86+raid+lvm2-quickinstall.xml
--
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/