lkml.org 
[lkml]   [2010]   [Aug]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [BISECTED] Today's Linus.git hangs during boot: can't find the floppy controller
On Mon, Aug 09, 2010 at 08:37:42AM +0200, Markus Trippelsdorf wrote:
> On Sun, Aug 08, 2010 at 01:17:53PM -0700, walt wrote:
> > This commit produces the error:
> >
> > commit 6ee0578b4daaea01c96b172c6aacca43fd9807a6
> > Author: Suresh Siddha <suresh.b.siddha@intel.com>
> > Date: Fri Jul 30 14:57:37 2010 -0700
> >
> > workqueue: mark init_workqueues() as early_initcall()
> >
> > Mark init_workqueues() as early_initcall() and thus it will be initialized
> > before smp bringup. init_workqueues() registers for the hotcpu notifier
> > and thus it should cope with the processors that are brought online after
> > the workqueues are initialized.
> >
> > x86 smp bringup code uses workqueues and uses a workaround for the
> > cold boot process (as the workqueues are initialized post smp_init()).
> > Marking init_workqueues() as early_initcall() will pave the way for
> > cleaning up this code.
> >
> > Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
> > Signed-off-by: Tejun Heo <tj@kernel.org>
> > Cc: Oleg Nesterov <oleg@redhat.com>
> > Cc: Andrew Morton <akpm@linux-foundation.org>
> >
> >
> > Just after the error message about the floppy controller not found, the
> > machine hangs for two minutes and then this message:
> >
> > task swapper:1 blocked for greater than 120 seconds, followed by a stack
> > trace, and again every two minutes AFAICT.
> >
> > I'm not including all the gory messages and stack traces because I'm
> > hoping you'll know what the problem is without them. (Fingers crossed.)
> >
> > BTW, I see this problem only on my dual-core machine, not the older single
> > single processor machine, as I would expect from reading the commit message.
> > (Both machine have properly functioning floppy drives.)
>
> (Added Tejun to CC)
>
> I see a similar problem here. The kernel will boot, but the system will
> not initialize (no X11).
> After reverting the commit, the system starts normally and the only
> workqueue problem left is drm related:

I would guess that both of you have CONFIG_HOTPLUG_CPU disabled and enabling
that config option will make the problem disappear.
From the problem description and the patch it looks like it got screwed up
the same way I did two years ago.
See commits a802dd0eb5fc97a50cf1abb1f788a8f6cc5db635 and
4403b406d4369a275d483ece6ddee0088cc0d592.


\
 
 \ /
  Last update: 2010-08-09 10:31    [W:0.058 / U:0.552 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site