On Thu, 2005-12-08 at 20:05 -0500, Lee Revell wrote:
> On Tue, 2005-11-29 at 10:32 +0100, Ingo Molnar wrote:
> > * Ingo Molnar <mingo@elte.hu> wrote:
> > 
> > > * Lee Revell <rlrevell@joe-job.com> wrote:
> > > 
> > > > On Mon, 2005-11-28 at 17:40 -0500, Lee Revell wrote:
> > > > > 2.6.11-RT-V0.7.40-04 works
> > > > 
> > > > and 2.6.12-RT-V0.7.51-28 does not.
> > > 
> > > thanks. I have further narrowed it down from this point: your .config 
> > > breaks from the 51-01 to the 51-02 kernel (on my testbox).
> > 
> > ok, fixed this one, it was the CURRENT_PTR optimization on UP that broke 
> > if 4K stacks were enabled. (i disabled the optimization for now)
> > 
> > But interestingly, your .config unearthed 2 other serious bugs (!) as 
> > well: the spin_unlock_irq() upon printk was incorrect for !PREEMPT_RT, 
> > and there was an assert introduced by the get-rid-of-bitlocks ext3 
> > patches which was invalid on UP && !PREEMPT_RT. We had these bugs for 
> > quite some time.
> > 
> > I've released -rt21 with these fixes, does it work better for you?

> We are unable to build a similar .config (PREEMPT_DESKTOP with soft and
> hardirq preemption disabled) on x86-64:

Here is the build output, .config attached.

Lee

$ make ARCH=x86_64 
  CHK     include/linux/version.h
scripts/kconfig/conf -s arch/x86_64/Kconfig
#
# using defaults found in .config
#
  SPLIT   include/linux/autoconf.h -> include/config/*
  CC      arch/x86_64/kernel/asm-offsets.s
  GEN     include/asm-x86_64/asm-offsets.h
  HOSTCC  scripts/testlpp
  CC      init/main.o
In file included from include/linux/proc_fs.h:6,
                 from init/main.c:17:
include/linux/fs.h: In function 'lock_super':
include/linux/fs.h:849: warning: implicit declaration of function 'down'
include/linux/fs.h: In function 'unlock_super':
include/linux/fs.h:855: warning: implicit declaration of function 'up'
  CHK     include/linux/compile.h
  CC      init/version.o
  CC      init/do_mounts.o
In file included from include/linux/tty.h:20,
                 from init/do_mounts.c:5:
include/linux/fs.h: In function 'lock_super':
include/linux/fs.h:849: warning: implicit declaration of function 'down'
include/linux/fs.h: In function 'unlock_super':
include/linux/fs.h:855: warning: implicit declaration of function 'up'
  CC      init/do_mounts_rd.o
In file included from init/do_mounts_rd.c:3:
include/linux/fs.h: In function 'lock_super':
include/linux/fs.h:849: warning: implicit declaration of function 'down'
include/linux/fs.h: In function 'unlock_super':
include/linux/fs.h:855: warning: implicit declaration of function 'up'
  CC      init/do_mounts_initrd.o

etc