Re: [gentoo-user] kernel bad scheduling from idle thread

[John Covici]

On Tue, 13 Oct 2020 03:39:48 -0400,
J. Roeleveld wrote:
>
> On Tuesday, October 13, 2020 9:26:08 AM CEST John Covici wrote:
> > Hi.  I am getting a very bad problem on my new kernel that I did after
> > my last update.  It gave me the following sequence over and over for a
> > while, and then stopped with the messages, but the system crashed.  I
> > then went back to my old kernel which had been working for more than a
> > month and got a couple of the same traces, but I hope its stopped, so
> > I can write this message.  A google search finds nothing relevant.
> >
> > Here is what I get:
> >
> > Oct 13 02:34:40 ccs.covici.com kernel: bad: scheduling from the idle
> > thread!
> > Oct 13 02:34:40 ccs.covici.com kernel: CPU: 5 PID: 0 Comm: swapper/5
> > Tainted: P        W  O      5.4.69-gentoo #1
> > Oct 13 02:34:40 ccs.covici.com kernel: Hardware name: Supermicro Super
> > Server/X11SCA-W, BIOS 1.2 12/05/2019
> > Oct 13 02:34:40 ccs.covici.com kernel: Call Trace:
> > Oct 13 02:34:40 ccs.covici.com kernel:  dump_stack+0x71/0x98
> > Oct 13 02:34:40 ccs.covici.com kernel:  dequeue_task_idle+0x1f/0x28
> > Oct 13 02:34:40 ccs.covici.com kernel:  __schedule+0x167/0x5d6
> > Oct 13 02:34:40 ccs.covici.com kernel:  schedule_idle+0x2a/0x33
> > Oct 13 02:34:40 ccs.covici.com kernel:  do_idle+0x1d0/0x1f2
> > Oct 13 02:34:40 ccs.covici.com kernel:  cpu_startup_entry+0x1d/0x1f
> > Oct 13 02:34:40 ccs.covici.com kernel:  start_secondary+0x17b/0x198
> > Oct 13 02:34:40 ccs.covici.com kernel:  secondary_startup_64+0xa4/0xb0
> > Oct 13 02:34:40 ccs.covici.com kernel: bad: scheduling from the idle
> > thread!
> > Oct 13 02:34:40 ccs.covici.com kernel: CPU: 5 PID: 0 Comm: swapper/5
> > Tainted: P        W  O      5.4.69-gentoo #1
> > Oct 13 02:34:40 ccs.covici.com kernel: Hardware name: Supermicro Super
> > Server/X11SCA-W, BIOS 1.2 12/05/2019
> > Oct 13 02:34:40 ccs.covici.com kernel: Call Trace:
> > Oct 13 02:34:40 ccs.covici.com kernel:  dump_stack+0x71/0x98
> > Oct 13 02:34:40 ccs.covici.com kernel:  dequeue_task_idle+0x1f/0x28
> > Oct 13 02:34:40 ccs.covici.com kernel:  __schedule+0x167/0x5d6
> > Oct 13 02:34:40 ccs.covici.com kernel:  schedule_idle+0x2a/0x33
> > Oct 13 02:34:40 ccs.covici.com kernel:  do_idle+0x1d0/0x1f2
> > Oct 13 02:34:40 ccs.covici.com kernel:  cpu_startup_entry+0x1d/0x1f
> > Oct 13 02:34:40 ccs.covici.com kernel:  start_secondary+0x17b/0x198
> > Oct 13 02:34:40 ccs.covici.com kernel:  secondary_startup_64+0xa4/0xb0
> >
> >
> > How would I even be able to find out what is happening here?
> >
> > Any thoughts appreciated.
>
> Which kernel versions have you tried?
> And which additional kernel modules have you added?
>
> I myself am using 5.4.66 as previous versions were causing kernel panics.
>

This is the first 5.4 kernel I have tried.  I did a make oldconfig and
added a number of modules, but I would think the kernel would only
load the ones that are needed.  I could not tell you the exact ones,
as I try to make the kernel somewhat general, so I may add things
which may not be necessary for my particular situation.

-- 
Your life is like a penny.  You're going to lose it.  The question is:
How do
you spend it?

         John Covici wb2una
         covici@××××××××××.com