lkml.org 
[lkml]   [2006]   [Aug]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH] memory hotadd fixes [4/5] avoid check in acpi

add_memory() does all necessary check to avoid collision.
then, acpi layer doesn't have to check region by itself.

(*) pfn_valid() just returns page struct is valid or not. It returns 0
if a section has been already added even is ioresource is not added.
ioresource collision check in mm/memory_hotplug.c can do more precise
collistion check.
added enabled bit check just for sanity check..

Signed-Off-By: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>


drivers/acpi/acpi_memhotplug.c | 9 +--------
1 files changed, 1 insertion(+), 8 deletions(-)
Index: linux-2.6.18-rc3/drivers/acpi/acpi_memhotplug.c
===================================================================
--- linux-2.6.18-rc3.orig/drivers/acpi/acpi_memhotplug.c 2006-08-01 16:11:47.000000000 +0900
+++ linux-2.6.18-rc3/drivers/acpi/acpi_memhotplug.c 2006-08-02 14:12:45.000000000 +0900
@@ -230,17 +230,10 @@
* (i.e. memory-hot-remove function)
*/
list_for_each_entry(info, &mem_device->res_list, list) {
- u64 start_pfn, end_pfn;
-
- start_pfn = info->start_addr >> PAGE_SHIFT;
- end_pfn = (info->start_addr + info->length - 1) >> PAGE_SHIFT;
-
- if (pfn_valid(start_pfn) || pfn_valid(end_pfn)) {
- /* already enabled. try next area */
+ if (info->enabled) { /* just sanity check...*/
num_enabled++;
continue;
}
-
result = add_memory(node, info->start_addr, info->length);
if (result)
continue;
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-08-03 05:37    [from the cache]
©2003-2014 Jasper Spaans. Advertise on this site