Re: [PATCH] ia64: change defconfig to NR_CPUS==1024

[Christoph Lameter]

On Wed, 11 Jan 2006, Paul Jackson wrote:

>       LD      .tmp_vmlinux1
>     arch/ia64/kernel/built-in.o(.init.text+0x68b2): In function `topology_init':
>     arch/ia64/kernel/ivt.S:1465: undefined reference to `__you_cannot_kmalloc_that_much'
>     make: *** [.tmp_vmlinux1] Error 1
> 
> Backing off to 512 CPUs built ok.
> 
> There are a couple of kmalloc() calls in topology_init().  I didn't try
> to figure out which one blew up, nor did I try to investigate further.

Here are two patches that might to cure it (used to be in 
2.6.15-rc5-mm1 but the cure accepted for the workqueues was to use
alloc_percpu):

From: Christoph Lameter <clameter@xxxxxxxxxxxx>

The workqueue structure can grow larger than 128k under 2.6.14-rc2 (with
all debugging features enabled on 64 bit platforms) which will make kzalloc
for workqueue structure entries fail.  This patch increases the maximum
slab entry size to 256K.

Signed-off-by: Christoph Lameter <clameter@xxxxxxx>
Cc: Manfred Spraul <manfred@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---

 include/linux/kmalloc_sizes.h |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -puN include/linux/kmalloc_sizes.h~increase-maximum-kmalloc-size-to-256k include/linux/kmalloc_sizes.h
--- 25/include/linux/kmalloc_sizes.h~increase-maximum-kmalloc-size-to-256k	Thu Sep 22 15:09:57 2005
+++ 25-akpm/include/linux/kmalloc_sizes.h	Thu Sep 22 15:09:57 2005
@@ -19,8 +19,8 @@
 	CACHE(32768)
 	CACHE(65536)
 	CACHE(131072)
-#ifndef CONFIG_MMU
 	CACHE(262144)
+#ifndef CONFIG_MMU
 	CACHE(524288)
 	CACHE(1048576)
 #ifdef CONFIG_LARGE_ALLOCS
_

From: Andrew Morton <akpm@xxxxxxxx>

Fix instaoops.

Cc: Christoph Lameter <clameter@xxxxxxx>
Cc: Manfred Spraul <manfred@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---

 mm/slab.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff -puN mm/slab.c~increase-maximum-kmalloc-size-to-256k-fix mm/slab.c
--- devel/mm/slab.c~increase-maximum-kmalloc-size-to-256k-fix	2005-09-22 21:19:27.000000000 -0700
+++ devel-akpm/mm/slab.c	2005-09-22 21:19:27.000000000 -0700
@@ -551,8 +551,8 @@ static void **dbg_userword(kmem_cache_t 
 #define	MAX_OBJ_ORDER	13	/* up to 32Mb */
 #define	MAX_GFP_ORDER	13	/* up to 32Mb */
 #elif defined(CONFIG_MMU)
-#define	MAX_OBJ_ORDER	5	/* 32 pages */
-#define	MAX_GFP_ORDER	5	/* 32 pages */
+#define	MAX_OBJ_ORDER	6	/* 64 pages */
+#define	MAX_GFP_ORDER	6	/* 64 pages */
 #else
 #define	MAX_OBJ_ORDER	8	/* up to 1Mb */
 #define	MAX_GFP_ORDER	8	/* up to 1Mb */
_
-
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