[Angstrom-devel] [RFH] Udev update

[Martin Jansa]

On Tue, Feb 09, 2010 at 04:05:14PM +0100, Koen Kooi wrote:
> > Hi,

Hi,

> > I've started working on cleaning up the udev recipe as well as making it
> > build the 'udev-extra' required for modern applications.

Great!

> > What does this new udev gain us:
> > 
> > * integration with in-kernel udevtmpfs for faster boot times
> > * cleaned up build system to make the recipe less ugly
> > * integration of modeswitch rules to make 3G usb modems "just work"
> > * 'udev-extras' like gudev to replace the monster called HAL
> > * Really doesn't work with CONFIG_SYSFS_DEPRICATED :)

I'm going to try that with xserver-xorg git master. But then we'll
probably drop udev too for SHR on om-gta*.

> > The downsides:
> > 
> > * Really doesn't work with CONFIG_SYSFS_DEPRICATED
> > * Needs at least kernel 2.6.27 for proper signalfd usage
> > * libvolume-id went away, need to update apps depending on it (very few)
> > * Needs testing
> > * Is picky about kernel config
> > 
> > For people wanting to help out with this I'd recommend reading at least
> > the 'README' file in the udev 151 tarballs and optionally the 'NEWS'
> > file to see what has changed between releases.
> > The 'README' also contains all the mandatory and option kernel config
> > options, so machine mentors will need to update their defconfigs to match.
> > 
> > And while you're vetting your defconfigs, please consider turning on
> > CONFIG_IKCONFIG_PROC, the 4kB size increase will save you and your users
> > from guessing which kernel had what defconfig.
> > 
> > For short term we should extend linux.inc to from the needed udev
> > options into the kernel like we already do with disabling
> > CONFIG_SYSFS_DEPRICATED.
> > 
> > So, who wants to help out with all this? We need to test this on lots of
> > angstrom targets before we can even RFC this on the oe-devel list, since
> > udev is such a 'core' piece of our software stack.

I can help with angstrom on spitz and om-gta02

Regards,

-- 
uin:136542059                jid:Martin.Jansa at gmail.com
Jansa Martin                 sip:jamasip at voip.wengo.fr 
JaMa