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<H1>[Mageia-dev] Issues with dracut</H1>
<B>Colin Guthrie</B>
<A HREF="mailto:mageia-dev%40mageia.org?Subject=Re%3A%20%5BMageia-dev%5D%20Issues%20with%20dracut&In-Reply-To=%3C4EEB51A4.6070003%40colin.guthr.ie%3E"
TITLE="[Mageia-dev] Issues with dracut">mageia at colin.guthr.ie
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<I>Fri Dec 16 15:11:48 CET 2011</I>
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<PRE>'Twas brillig, and Anssi Hannula at 16/12/11 12:58 did gyre and gimble:
><i> On 16.12.2011 14:35, Colin Guthrie wrote:
</I>>><i> Hiya,
</I>>><i>
</I>>><i> 'Twas brillig, and JA Magallon at 16/12/11 12:06 did gyre and gimble:
</I>>>><i> After those couple previous thread it looks like move to dracut is
</I>>>><i> ongoing, so I decided to try it.
</I>>><i>
</I>>><i> Good! This is exactly the kind of feedback we need!
</I>>><i>
</I>>>><i> I found a couple problems:
</I>>>><i>
</I>>>><i> - dracut inists on loading nouveau driver. With mknitrd, just booting with nokmsboot
</I>>>><i> works. Booting with a dracut generated initrd ignores that. I think it is plymouth
</I>>>><i> that forces it, even if I added 'blacklist nouveau' in a .conf file in modprobe.d:
</I>>>><i>
</I>>>><i> dracut -f:
</I>>><i>
</I>>><i> I'll include it but if it's blacklisted, it shouldn't ultimately be used
</I>>><i> in the ramfs even if it's included. That said, it's clearly inefficient
</I>>><i> to include it if it is blacklisted so we should try and fix that. Anssi,
</I>>><i> could this be your code to detect the h/w that causes it to bypass any
</I>>><i> blacklist checks (not sure if there are actually any blacklist checks
</I>>><i> when building the initrd... not relaly looked at it much)
</I>><i>
</I>><i> There is no check.
</I>
OK, so that's fine I think, just a slightly bigger initramfs than is
100% needed but such is life.
I wonder, does the modprobe -R stuff process blacklists... it would be
kinda nice if a side effect of improving the hostonly mode was to not
include blacklisted modules... :D
>><i> I think the nokmsboot parameter is not working in dracut because the
</I>>><i> udev rule that interprets it uses the grep command and that is not
</I>>><i> currently included in the ramdisk. I could hack it in easy enough, but
</I>>><i> we should maybe see if a more minimal method of detecting it in the
</I>>><i> commandline is possible.
</I>><i>
</I>><i> Ah, my dracut initramfs from last month has it, but maybe it has changed
</I>><i> since then...
</I>
I suspect it's a side effect of:
./modules.d/00bootchart/module-setup.sh: inst /bin/grep
i.e. if you have bootchart installed, then you get grep and thus other
things work too.
><i> Feel free to change the udev rule to use a more minimal method :)
</I>
I'll have a look and if I cannot come up with something better, I'll
just give up and force grep to be installed :D
Cheers
Col
--
Colin Guthrie
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