BUG: Kernel Panic: kernel-2.6.1 for alpha in scsi context ll_rw_blk.c

[Thomas Steudten]

Hello

I test the new 2.6.1 kernel and run in the same problem as before.
The reason is, that the patch from Ivan isn´t there in the kernel
source tree.

Please add the patch to the mainline.

Tom

Thomas Steudten wrote:

> Hi
>
> With the patch from Ivan, the prefetch problem is gone.
> Please add this patch to the mainline for 2.6.0 for alpha.
>
> Regards
> Tom
>
> > We shouldn't prefetch the spinlocks on UP.
> >
> > Ivan.
> >
> > --- 2.6/include/asm-alpha/processor.h    Sat Oct 25 22:44:54 2003
> > +++ linux/include/asm-alpha/processor.h    Tue Nov 18 01:48:39 2003
> > @@ -78,6 +78,11 @@ unsigned long get_wchan(struct task_stru
> >  #define ARCH_HAS_PREFETCHW
> >  #define ARCH_HAS_SPINLOCK_PREFETCH
> >  
> > +#ifndef CONFIG_SMP
> > +/* Nothing to prefetch. */
> > +#define spin_lock_prefetch(lock)      do { } while (0)
> > +#endif
> > +
> >  #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)
> >  extern inline void prefetch(const void *ptr)   { @@ -89,10 +94,13 @@ 
> > extern inline void prefetchw(const void      __builtin_prefetch(ptr, 
> > 1, 3);
> >  }
> >  
> > +#ifdef CONFIG_SMP
> >  extern inline void spin_lock_prefetch(const void *ptr)   {
> >      __builtin_prefetch(ptr, 1, 3);
> >  }
> > +#endif
> > +
> >  #else
> >  extern inline void prefetch(const void *ptr)   { @@ -104,10 +112,13 
> > @@ extern inline void prefetchw(const void      __asm__ ("ldq $31,%0" 
> > : : "m"(*(char *)ptr));  }
> >  
> > +#ifdef CONFIG_SMP
> >  extern inline void spin_lock_prefetch(const void *ptr)   {
> >      __asm__ ("ldq $31,%0" : : "m"(*(char *)ptr));  }
> > +#endif
> > +
> >  #endif /* GCC 3.1 */
> >  
> >  #endif /* __ASM_ALPHA_PROCESSOR_H */

--
Tom

LINUX user since kernel 0.99.x 1994.
RPM Alpha packages at http://alpha.steudten.com/packages
Want to know what S.u.S.E 1995 cdrom-set contains?


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