XIP issues introduced between 2.6.12 and 2.6.13

[Konstantin Kletschke]

At Wed, 12 Oct 2005 13:47:01 -0400 (EDT),
Nicolas Pitre <nico at cam.org> wrote:

> > NFS used in both cases as root file system.
> 
> What both cases?

Yes, to clear out a concrete difference.

When I use jffs2 as the root fs I can only build it into the kernel
image and debugging is plain guessing. As a side note I will explain
the behaviour build in and / on jffs2: It crashes most often after
"Initializing random number generator" Which is one of the first
points the userspace is "stressed". Sometimes here:
http://lists.infradead.org/pipermail/linux-mtd/2005-October/014005.html

In the other half of boots at another random place.

> Does it crash when JFFS2 is built-in but _not_ used as root?

Yes. I boot with root on nfs:
flash_unlock /dev/mtd3 -> works
mount -t jffs2 /dev/mtdblock3 /mnt -> works
cd /mnt -> works
ls -laR -> works
touch a -> immediate freeze.

> > In both cases built in.
> > Only difference a "jffs2" in lsmod output or not :-)
> 
> If so something is really weird.
> 
> CAn you try with and without CONFIG_JFFS2_FS_WRITEBUFFER?

Yes. 

> Looking at the changelog between v2.6.12 and v2.6.13 for fs/jffs2/ I 
> don't see anything that could obviously explain the above.
> 
> Can you try the 2.6.12 code for JFFS2 in your 2.6.13 kernel?

Also yes.

Konsti

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