On Thursday, 8 of November 2007, Grant Wilson wrote:
> On Thu, 8 Nov 2007 22:42:21 +0100
> "Rafael J. Wysocki" <[EMAIL PROTECTED]> wrote:
>
> > On Thursday, 8 of November 2007, Grant Wilson wrote:
> > > On Thu, 8 Nov 2007 16:53:10 +0100
> > > "Rafael J. Wysocki" <[EMAIL PROTECTED]> wrote:
> > >
> > > > On Thursday, 8 of November 2007, Grant Wilson wrote:
> > > > > On Thu, 8 Nov 2007 01:06:21 +0100
> > > > > "Rafael J. Wysocki" <[EMAIL PROTECTED]> wrote:
> > > > >
> > > > > > On Monday, 5 of November 2007, Grant Wilson wrote:
> > > > > > > Hi,
> > > > > > > I got this oops on 2.6.24-rc1-641-gb4f5550:
> > > > > >
> > > > > > (1) Is this reproducible?
> > > > > > (2) Did it happen previously on your system?
> > > > > >
> > > > > > [18073.371126] Unable to handle kernel NULL pointer dereference at
> > > > > > 0000000000000120 RIP:
> > > > > > [18073.371134] [<ffffffff8023572e>] check_preempt_wakeup+0x6e/0x110
> > > > >
> > > > > This has now happened twice - the second time was last night when
> > > > > running 2.6.24-rc2.
> > > > >
> > > > > Here's that second occurrence:
> > > > >
> > > [snip]
> > > >
> > > > Hmm.
> > > >
> > > > Please run "gdb vmlinux" and see what code corresponds to
> > > > check_preempt_wakeup+0x6e in your kernel.
> > >
> > >
> > > Dump of assembler code for function check_preempt_wakeup:
> >
> > Well, thanks, but I meant the source code. Please do "gdb vmlinux" and then
> > "l *check_preempt_wakeup+0x6e" in gdb.
>
> Here's the requested output:
>
> (gdb) l *check_preempt_wakeup+0x6e
> 0xffffffff802329ae is in check_preempt_wakeup (kernel/sched_fair.c:668).
> 663
> 664 /* Do the two (enqueued) entities belong to the same group ? */
> 665 static inline int
> 666 is_same_group(struct sched_entity *se, struct sched_entity *pse)
> 667 {
> 668 if (se->cfs_rq == pse->cfs_rq)
> 669 return 1;
> 670
> 671 return 0;
> 672 }
Well, it looks like either se or pse is NULL.
Ingo, can you please have a look?
Thanks,
Rafael
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