[Mageia-dev] Issues with dracut

Fri Dec 16 15:11:48 CET 2011

'Twas brillig, and Anssi Hannula at 16/12/11 12:58 did gyre and gimble:
+> On 16.12.2011 14:35, Colin Guthrie wrote:
+>> Hiya,
+>>
+>> 'Twas brillig, and JA Magallon at 16/12/11 12:06 did gyre and gimble:
+>>> After those couple previous thread it looks like move to dracut is
+>>> ongoing, so I decided to try it.
+>>
+>> Good! This is exactly the kind of feedback we need!
+>>
+>>> I found a couple problems:
+>>>
+>>> - dracut inists on loading nouveau driver. With mknitrd, just booting with nokmsboot
+>>>   works. Booting with a dracut generated initrd ignores that. I think it is plymouth
+>>>   that forces it, even if I added 'blacklist nouveau' in a .conf file in modprobe.d:
+>>>
+>>> dracut -f:
+>>
+>> I'll include it but if it's blacklisted, it shouldn't ultimately be used
+>> in the ramfs even if it's included. That said, it's clearly inefficient
+>> to include it if it is blacklisted so we should try and fix that. Anssi,
+>> could this be your code to detect the h/w that causes it to bypass any
+>> blacklist checks (not sure if there are actually any blacklist checks
+>> when building the initrd... not relaly looked at it much)
+> 
+> There is no check.
+
+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 think the nokmsboot parameter is not working in dracut because the
+>> udev rule that interprets it uses the grep command and that is not
+>> currently included in the ramdisk. I could hack it in easy enough, but
+>> we should maybe see if a more minimal method of detecting it in the
+>> commandline is possible.
+> 
+> Ah, my dracut initramfs from last month has it, but maybe it has changed
+> since then...
+
+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.
+
+> Feel free to change the udev rule to use a more minimal method :)
+
+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
+colin(at)mageia.org
+http://colin.guthr.ie/
+
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+  Tribalogic Limited http://www.tribalogic.net/
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+