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authorToshi Kani <toshi.kani@hp.com>2013-04-29 15:08:20 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-04-29 15:54:37 -0700
commitfe74ebb106a5950e82222c8ea258a9c0d7c65f04 (patch)
tree2a100f3a3cbf12eaa6b31721bb2bde4539923d56 /mm
parent825f787bb49676083b97c1de1f8f2f8f26b5c908 (diff)
downloadlinux-fe74ebb106a5950e82222c8ea258a9c0d7c65f04.tar.gz
mm: change __remove_pages() to call release_mem_region_adjustable()
Change __remove_pages() to call release_mem_region_adjustable(). This allows a requested memory range to be released from the iomem_resource table even if it does not match exactly to an resource entry but still fits into. The resource entries initialized at bootup usually cover the whole contiguous memory ranges and may not necessarily match with the size of memory hot-delete requests. If release_mem_region_adjustable() failed, __remove_pages() emits a warning message and continues to proceed as it was the case with release_mem_region(). release_mem_region(), which is defined to __release_region(), emits a warning message and returns no error since a void function. Signed-off-by: Toshi Kani <toshi.kani@hp.com> Reviewed-by : Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Acked-by: David Rientjes <rientjes@google.com> Cc: Ram Pai <linuxram@us.ibm.com> Cc: T Makphaibulchoke <tmac@hp.com> Cc: Wen Congyang <wency@cn.fujitsu.com> Cc: Tang Chen <tangchen@cn.fujitsu.com> Cc: Jiang Liu <jiang.liu@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/memory_hotplug.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 57decb29e05..c916582591e 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -705,8 +705,10 @@ EXPORT_SYMBOL_GPL(__add_pages);
int __remove_pages(struct zone *zone, unsigned long phys_start_pfn,
unsigned long nr_pages)
{
- unsigned long i, ret = 0;
+ unsigned long i;
int sections_to_remove;
+ resource_size_t start, size;
+ int ret = 0;
/*
* We can only remove entire sections
@@ -714,7 +716,12 @@ int __remove_pages(struct zone *zone, unsigned long phys_start_pfn,
BUG_ON(phys_start_pfn & ~PAGE_SECTION_MASK);
BUG_ON(nr_pages % PAGES_PER_SECTION);
- release_mem_region(phys_start_pfn << PAGE_SHIFT, nr_pages * PAGE_SIZE);
+ start = phys_start_pfn << PAGE_SHIFT;
+ size = nr_pages * PAGE_SIZE;
+ ret = release_mem_region_adjustable(&iomem_resource, start, size);
+ if (ret)
+ pr_warn("Unable to release resource <%016llx-%016llx> (%d)\n",
+ start, start + size - 1, ret);
sections_to_remove = nr_pages / PAGES_PER_SECTION;
for (i = 0; i < sections_to_remove; i++) {