The patch titled
Add IORESOUCE_BUSY flag for System RAM
has been added to the -mm tree. Its filename is
add-ioresouce_busy-flag-for-system-ram.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: Add IORESOUCE_BUSY flag for System RAM
From: Yasunori Goto <[EMAIL PROTECTED]>
i386 and x86-64 registers System RAM as IORESOURCE_MEM | IORESOURCE_BUSY.
But ia64 registers it as IORESOURCE_MEM only.
In addition, memory hotplug code registers new memory as IORESOURCE_MEM too.
This difference causes a failure of memory unplug of x86-64. This patch
fixes it.
This patch adds IORESOURCE_BUSY to avoid potential overlap mapping by PCI
device.
Signed-off-by: Yasunori Goto <[EMAIL PROTECTED]>
Signed-off-by: Badari Pulavarty <[EMAIL PROTECTED]>
Cc: Luck, Tony" <[EMAIL PROTECTED]>
Cc: Thomas Gleixner <[EMAIL PROTECTED]>
Cc: Ingo Molnar <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
arch/ia64/kernel/efi.c | 6 ++----
kernel/resource.c | 2 +-
mm/memory_hotplug.c | 2 +-
3 files changed, 4 insertions(+), 6 deletions(-)
diff -puN arch/ia64/kernel/efi.c~add-ioresouce_busy-flag-for-system-ram
arch/ia64/kernel/efi.c
--- a/arch/ia64/kernel/efi.c~add-ioresouce_busy-flag-for-system-ram
+++ a/arch/ia64/kernel/efi.c
@@ -1112,7 +1112,7 @@ efi_initialize_iomem_resources(struct re
if (md->num_pages == 0) /* should not happen */
continue;
- flags = IORESOURCE_MEM;
+ flags = IORESOURCE_MEM | IORESOURCE_BUSY;
switch (md->type) {
case EFI_MEMORY_MAPPED_IO:
@@ -1134,12 +1134,11 @@ efi_initialize_iomem_resources(struct re
case EFI_ACPI_MEMORY_NVS:
name = "ACPI Non-volatile Storage";
- flags |= IORESOURCE_BUSY;
break;
case EFI_UNUSABLE_MEMORY:
name = "reserved";
- flags |= IORESOURCE_BUSY | IORESOURCE_DISABLED;
+ flags |= IORESOURCE_DISABLED;
break;
case EFI_RESERVED_TYPE:
@@ -1148,7 +1147,6 @@ efi_initialize_iomem_resources(struct re
case EFI_ACPI_RECLAIM_MEMORY:
default:
name = "reserved";
- flags |= IORESOURCE_BUSY;
break;
}
diff -puN kernel/resource.c~add-ioresouce_busy-flag-for-system-ram
kernel/resource.c
--- a/kernel/resource.c~add-ioresouce_busy-flag-for-system-ram
+++ a/kernel/resource.c
@@ -277,7 +277,7 @@ walk_memory_resource(unsigned long start
int ret = -1;
res.start = (u64) start_pfn << PAGE_SHIFT;
res.end = ((u64)(start_pfn + nr_pages) << PAGE_SHIFT) - 1;
- res.flags = IORESOURCE_MEM;
+ res.flags = IORESOURCE_MEM | IORESOURCE_BUSY;
orig_end = res.end;
while ((res.start < res.end) && (find_next_system_ram(&res) >= 0)) {
pfn = (unsigned long)(res.start >> PAGE_SHIFT);
diff -puN mm/memory_hotplug.c~add-ioresouce_busy-flag-for-system-ram
mm/memory_hotplug.c
--- a/mm/memory_hotplug.c~add-ioresouce_busy-flag-for-system-ram
+++ a/mm/memory_hotplug.c
@@ -39,7 +39,7 @@ static struct resource *register_memory_
res->name = "System RAM";
res->start = start;
res->end = start + size - 1;
- res->flags = IORESOURCE_MEM;
+ res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
if (request_resource(&iomem_resource, res) < 0) {
printk("System RAM resource %llx - %llx cannot be added\n",
(unsigned long long)res->start, (unsigned long long)res->end);
_
Patches currently in -mm which might be from [EMAIL PROTECTED] are
add-ioresouce_busy-flag-for-system-ram.patch
-
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