Gentoo Archives: gentoo-dev

From: Chris Gianelloni <wolf31o2@g.o>
To: gentoo-dev@l.g.o
Subject: Re: [gentoo-dev] devfs is dead, let's move on
Date: Thu, 07 Jul 2005 14:20:36
Message-Id: 1120745893.11567.42.camel@cgianelloni.nuvox.net
In Reply to: [gentoo-dev] devfs is dead, let's move on by Greg KH
1 On Wed, 2005-07-06 at 15:46 -0700, Greg KH wrote:
2 > To start with, the 061 version of udev offers a big memory savings if
3 > you use the "default" kernel name of a device[3]. If you do that, it does
4 > not create a file in its database in /dev/.udevdb/
5
6 So if we were to switch to udev 061 in genkernel, it would shrink memory
7 usage in our initrd/initramfs, provided we made everything use the LSB
8 device names/nodes, versus the devfs ones, correct?
9
10 > If we can move away from some of our devfs-like names, we stand to
11 > reclaim a lot of memory from everyone's machines. As an example, if we
12 > drop all of the tty/pts/vc/vcc symlinks, and just go with the default
13 > kernel name, we save 2.5Mb of space in tempfs/ramfs. I've done this on
14 > my machines and everything seems to work just fine (it looks like
15 > everything that was trying to use a tty node was just using the symlink
16 > anyway.)
17 >
18 > So, anyone have any objections to me changing the default udev naming
19 > scheme in this manner?
20
21 None here. Anything that gives us more usable RAM even after we've
22 snatched some for the initrd and for /dev and for the tmpfs of the
23 LiveCD/InstallCD is fine by me.
24
25 --
26 Chris Gianelloni
27 Release Engineering - Strategic Lead/QA Manager
28 Games - Developer
29 Gentoo Linux

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Re: [gentoo-dev] devfs is dead, let's move on Greg KH <gregkh@g.o>