Re: 2.6.9-rc3-mm2

[Andrew Morton]

Grant Wilson <gww@xxxxxxxxxxxxxx> wrote:
>
> Andrew Morton wrote:
> [snip]
> 
> >>IP: routing cache hash table of 4096 buckets, 32KBytes
> >>kmem_cache_create: Early error in slab ip_fib_hash
> >>-----[ cut here ] -----
> >>kernel BUG at mm/slab.c:1185!
> >>invalid operand: 0000 [#1]
> >>PREEMPT
> 
> [snip]
> 
> I am hitting the same stop on my amd64 box.  With your patch the
> following is reported:
> 
> in_interrupt(): 268435200  (ie 0x0fffff00)
> preempt_count(): ffffffff

heh, OK, someone goofed there.

Could you try this patch?  It'll locate the bug for us.

--- 25/include/linux/preempt.h~a	Mon Oct  4 14:31:24 2004
+++ 25-akpm/include/linux/preempt.h	Mon Oct  4 14:31:49 2004
@@ -19,6 +19,8 @@ do { \
 #define dec_preempt_count() \
 do { \
 	preempt_count()--; \
+	if (preempt_count() == -1) \
+		*(char *)0 = 0; \
 } while (0)
 
 #ifdef CONFIG_PREEMPT
_


(I'd have used BUG, but that might cause inclusion problems)
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/