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Bug#748211: os-prober: Dangerous failure during kernel upgrade (probed NFS?)

On Thu, 2014-05-15 at 11:07 +0100, Conrad J.C. Hughes (for Debian
package stuff) wrote:
> Package: os-prober
> Version: 1.58
> Severity: normal
> Dear Maintainer,
> *** Please consider answering these questions, where appropriate ***
> os-prober can appear to hang, possibly while trying to probe a hung NFS
> server, and attempts to kill this (typically invoked during kernel
> upgrade) can leave you with a machine which can't mount drives that it
> needs to probe, because the kernel upgrade has removed/updated the
> running kernel's FS modules.
> I'm not sure what the best way of dealing with this is, but two that
> occur to me are:
>   - If os-prober hung because it was trying to probe my NFS mount, then
>     should it really be doing that?  Does it make sense to os-probe
>     network drives during a kernel upgrade?
>   - If it hung because it was trying to load fuse/ntfs kernel modules
>     which had just been rendered unloadable by updates from the (3.2.0-4
>     to 3.2.0-4, so far as I can see: same version) partial kernel
>     upgrade, then perhaps os-prober should be run before the existing
>     kernel's modules are replaced?

There is no need to re-run os-prober during a kernel update.  In fact I
don't think it should ever be run automatically, aside from during
installation.  I think this is a bug in GRUB (which invokes it during
kernel update) rather than os-prober.


Ben Hutchings
We get into the habit of living before acquiring the habit of thinking.
                                                              - Albert Camus

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