Linux reboot command takes too long

[Rajat Sharma]

It looks like your system has:

   1. Kernel crash dump configured.
   2. Something is causing crash while you issue a reboot, may be some
   module unload path has a bug.
   3. Crash is triggering kernel dump to take dump of memory (I guess you
   have plenty of RAM to justify 45 minutes) in /var/core directory. Although
   dump image is highly compressible but compression is the last step.
   4. If there is no space in /var/core, kdump gives up and you see faster
   reboot.

-Rajat


On Fri, May 30, 2014 at 12:39 PM, <Valdis.Kletnieks at vt.edu> wrote:

> On Fri, 30 May 2014 12:32:32 -0700, Vipul Jain said:
>
> > On my system I have /var/core directory created which has 300G space and
> if
> > I fill the /var/core with files say upto 290G and reboot the system and
> > after it comes up and delete the files in /var/core and try to reboot the
> > system takes 45 mins before it actually reboots. Wondering if anyone has
> > seen this before and what could be the issue?
>
> Is this reproducible?
>
> Do you have any clue at all where in the reboot process it's sitting
> for the 45 minutes?
>
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