Re: 2.6.16-rc4: known regressions

[Greg KH]

On Wed, Feb 22, 2006 at 10:59:23AM -0800, Joel Becker wrote:
> On Wed, Feb 22, 2006 at 06:33:54PM +0100, Gabor Gombas wrote:
> > I don't think isnmod is broken. It's job is to load a chunk of code into
> > the kernel, and it's doing just that.
> > 
> > ...
> >
> > But if your kernel has CONFIG_HOTPLUG enabled, then _you_ have asked for
> > this exact behavior, therefore you should better fix userspace to cope
> > with it. Your initrd should use the notification mechanisms provided by
> > the kernel to wait for the would-be root device really becoming
> > available; if it's not doing that, then IMHO you should not use a
> > CONFIG_HOTPLUG enabled kernel.
> 
>         The issue isn't so much "insmod is right" vs "insmod is wrong".
> It's that the behavior changed in a surprising fashion.  Red Hat's
> kernel for RHEL4 (in our example) has CONFIG_HOTPLUG=y, yet it Just
> Works.  A more recent kernel (.15 and .16 at least) with
> CONFIG_HOTPLUG=y doesn't work.  Same disk drivers.  Same initramfs
> script.

RHEL is a very different kernel from mainline (just like SLES is).  Have
you looked through their patches to see if they are including something
that causes this behavior?

What about trying a stock 2.6.6 or so kernel?  Does that work
differently from 2.6.15?

thanks,

greg k-h
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