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]
Message-ID: <Pine.LNX.4.64.0710151952250.3949@asgard.lang.hm>
Date:	Mon, 15 Oct 2007 19:54:22 -0700 (PDT)
From:	david@...g.hm
To:	Greg KH <greg@...ah.com>
cc:	Rob Landley <rob@...dley.net>,
	Julian Calaby <julian.calaby@...il.com>,
	Theodore Tso <tytso@....edu>,
	James Bottomley <James.Bottomley@...eleye.com>,
	Matthew Wilcox <matthew@....cx>, linux-kernel@...r.kernel.org,
	linux-scsi@...r.kernel.org, Jens Axboe <axboe@...e.de>,
	Suparna Bhattacharya <suparna@...ibm.com>,
	Nick Piggin <piggin@...erone.com.au>
Subject: Re: What still uses the block layer?

On Mon, 15 Oct 2007, Greg KH wrote:

> On Mon, Oct 15, 2007 at 05:08:36AM -0500, Rob Landley wrote:
>> On Monday 15 October 2007 4:06:20 am Julian Calaby wrote:
>>> On 10/15/07, Rob Landley <rob@...dley.net> wrote:
>>>> I note that the eth0 and eth1 names are dynamically assigned on a first
>>>> come first serve basis (like scsi).  This never causes me a problem
>>>> because the driver loading order is constant, and once you figure out
>>>> that eth0 is gigabit and eth1 is the 80211g it _stays_ that way across
>>>> reboots, reliably. Yeah, it's a heuristic.  Hands up everybody relying on
>>>> such a heuristic in the real world.
>>>
>>> Umm, not quite, from my experiences with pre-production wireless
>>> drivers, (another story, another time) fancy stuff is being done in
>>> udev to make sure that your gigabit card is always assigned to eth0.
>>
>> I remember building a 2.4 kernel, statically linking in all the drivers, and
>> getting the ethernet devices showing up in a reliable order for years.  Where
>> does the need for fancy stuff come in?
>
> Because PCI devices reorder their bus numbers all the time.  And we have
> ethernet devices hanging off of USB connections now (yes, even built-in
> to the machine), and we have network connections on other hot-pluggable
> busses (remember, PCI is hot pluggable.)

do PCI devices reorder their bus numbers spontaniously, or only if you 
change the hardware?

> So, the distros need to name network devices in a persistant way, that
> is why the distros now do this.  If you don't like the distro doing it,
> complain to them, it's not a kernel issue :)

I have, at least the response was to tell me how to kill this 'feature' 
even if they won't change it.

David Lang

-
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/

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ