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

quoted

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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