[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index]

Re: Possible bug in 2.6.2-rc1-ben1 and XFS?


After some more investigation, I found that the problem lies when
compiling HFS support in the kernel and trying to boot a root filesystem
that has a name starting by a letter "bigger than" H (such as UFS, if
you could have a / in such a fs! :), or in my case, XFS.

The file init/do_mounts.c has a function that after getting all the
filesystems compiled in the kernel, iterates through them, one by one,
trying to mount the / partition. Since h(fs) is "lower" than x(fs), the
loop tries to mount my /dev/hda4 as hfs, and this, _somehow_ manages to
break the loop and produces the kernel panic.

This last bit is made from "guessing" a little bit about what could be
going on there, because I just cannot understand why is panics...

The loop is supposed to move on if one of the mounts fails! It _should_
fail nicely since it is xfs and not hfs, but the hfs thingie manages to
break the boot process.

I donŽt mind much, since compiling as modules fixes all the problems
(the boot problem and my problem, since I should learn to keep the
kernel simple :-D ) but I think the error is _quite_ obscure, since the
VFS: Cannot mount root and the panic usually happen because of devfs or
because of passing a wrong root=  but _not_ because you compiled support
for a filesystem that you donŽt use (at boot time).

Anyways, it was quite interesting to work it out :-D  If anyone wants to
fix it, and needs testing, I an happy to help.


J. Javier Maestro

Reply to: