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Date: Mon, 5 Apr 2004 13:24:19 +1000
From: Anton Blanchard <anton@samba.org>
To: olh@suse.de
Cc: mbligh@aracnet.com, agl@us.ibm.com, markv@us.ibm.com,
	benh@kernel.crashing.org, paulus@samba.org,
	david@gibson.dropbear.id.au
Subject: configurable TASK_UNMAPPED_BASE for ppc64
Message-ID: <20040405032419.GA26474@krispykreme>
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Hi,

Here are the ppc64 bits to support a configurable TASK_UNMAPPED_BASE as
in SLES9. It only operates on 32bit tasks (same as x86-64).

It will be required to allow us to allocate the maximum amount of
largepage.

Also attached is the complete patch, fixed to apply to mainline.

Anton


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Date: Mon, 5 Apr 2004 13:24:19 +1000
From: Anton Blanchard <anton@samba.org>
To: olh@suse.de
Cc: mbligh@aracnet.com, agl@us.ibm.com, markv@us.ibm.com,
	benh@kernel.crashing.org, paulus@samba.org,
	david@gibson.dropbear.id.au
Subject: configurable TASK_UNMAPPED_BASE for ppc64
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X-Spam-Level: 
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	version=2.63


Hi,

Here are the ppc64 bits to support a configurable TASK_UNMAPPED_BASE as
in SLES9. It only operates on 32bit tasks (same as x86-64).

It will be required to allow us to allocate the maximum amount of
largepage.

Also attached is the complete patch, fixed to apply to mainline.

Anton








diff -upN reference/include/asm-ppc64/processor.h current/include/asm-ppc64/processor.h
--- reference/include/asm-ppc64/processor.h	Thu Jun 17 12:58:30 2004
+++ current/include/asm-ppc64/processor.h	Thu Jun 17 12:58:30 2004
@@ -525,8 +525,11 @@ extern struct task_struct *last_task_use
 
 /* This decides where the kernel will search for a free chunk of vm
  * space during mmap's.
+ *
+ * /proc/pid/unmap_base is only supported for 32bit processes for now.
  */
-#define TASK_UNMAPPED_BASE_USER32 (PAGE_ALIGN(STACK_TOP_USER32 / 4))
+#define __TASK_UNMAPPED_BASE (PAGE_ALIGN(STACK_TOP_USER32 / 4))
+#define TASK_UNMAPPED_BASE_USER32 (PAGE_ALIGN(current->map_base))
 #define TASK_UNMAPPED_BASE_USER64 (PAGE_ALIGN(STACK_TOP_USER64 / 4))
 
 #define __TASK_UNMAPPED_BASE (PAGE_ALIGN(STACK_TOP_USER32 / 4))