Re: RFC: InfiniBand hotplug agent

[Greg KH <greg@kroah.com>]

On Wed, Mar 22, 2006 at 12:36:44PM -0800, Roland Dreier wrote:
> Hmm, that's a problem, and indeed if I let the driver be loaded on
> boot, I end up with "(none)" as the hostname (I usually blacklist my
> IB drivers, because I do a lot of driver development and it's a pain
> when the system crashes on boot because of bugs I wrote).
> 
> Do you think using /etc/hostname instead (on Debian at least) is a
> palatable solution?  It seems this will end up being distro specific
> unfortunately...  Here's what I just tested (along with your
> ACTION="add" suggestion), and it worked well even when the driver is
> loaded at boot time:

/etc is not even around at early boot time (think module loading from
initramfs/initrd), which is what the "enterprise" distros do.

> #!/bin/sh -e
> 
> DESC_PATH="/sys/$DEVPATH/node_desc"
> 
> [ -e "$DESC_PATH" ] || exit 0
> 
> read OLD_DESC < $DESC_PATH
> read HOSTNAME < /etc/hostname
> echo -n "$HOSTNAME ($OLD_DESC)" > $DESC_PATH

Why does your drivers care about the hostname?  The kernel already knows
this information anyway...

thanks,

greg k-h


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