On Sun, 2014-11-30 at 12:38 +0100, lee wrote: > Ben Hutchings <ben@decadent.org.uk> writes: > > > On Sat, 2014-11-29 at 23:52 +0100, lee wrote: > > [...] > >> > I think that I can deal with this in the backport by either > >> > (a) removing linux-initramfs-tool as a dependency, or > >> > (b) adding a versioned alternate dependency on dracut, that is not > >> > satisfied by stable, > >> > though neither of those is very satisfactory. > >> > >> (c) remove from dracut that it provides initramfs-tools and have the > >> backports kernel require the backports initramfs-tools package > >> > >> Apparently dracut doesn't exactly provide initramfs-tools for otherwise > >> the backports kernel wouldn't get stuck during boot when initramfs-tools > >> is not installed but dracut is while the root fs is on an LVM logical > >> volume. > > > > I tried using dracut for a while, and it did support booting from LVM > > without any need to explicitly configure that. I don't know why it > > didn't work on your system, but that's a bug and not a fundamental > > reason why it shouldn't be allowed as an alternative to initramfs-tools. > > Hm, then why doesn't it work for me? How could I find out? I don't know; you should open a bug report on dracut. > > [...] > >> And BTW, dracut has the huge advantage that you can explicitly exclude > >> modules from being included into the initrd image. With > >> initramfs-tools, I still haven't found a way to exclude the bnx2 and > >> e1000e modules (other than moving them away from /lib/modules/ before > >> updating the initrd image and putting them back after). They must not > >> be loaded so early because I'm passing network cards through to domUs, > >> which is impossible when their modules are loaded from the initrd image. > > > > It is possible, but you have to unbind them first, e.g.: > > echo 0000:12:34.5 > /sys/bus/pci/drivers/e1000e/unbind > > First load them, then unbind them, then unload them, then pass the > device through? You can either unload the driver or unbind it from the specific devices you want to pass through. You don't need to do both. > > You can also 'blacklist' the drivers through modprobe configuration so > > that they aren't automatically loaded as soon as the devices are found. > > I tried blacklisting, and it didn't work. It seems that blacklisting is > ignored for modules loaded from the initrd image. You need to update the initramfs so it includes the new configuration file. Ben. -- Ben Hutchings The world is coming to an end. Please log off.
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