Subject: + memblock-factor-out-of-top-down-allocation.patch added to -mm tree
To: tangchen@xxxxxxxxxxxxxx,hannes@xxxxxxxxxxx,hpa@xxxxxxxxx,isimatu.yasuaki@xxxxxxxxxxxxxx,izumi.taku@xxxxxxxxxxxxxx,jiang.liu@xxxxxxxxxx,kamezawa.hiroyu@xxxxxxxxxxxxxx,laijs@xxxxxxxxxxxxxx,liwanp@xxxxxxxxxxxxxxxxxx,mgorman@xxxxxxx,mina86@xxxxxxxxxx,minchan@xxxxxxxxxx,mingo@xxxxxxx,riel@xxxxxxxxxx,tglx@xxxxxxxxxxxxx,tj@xxxxxxxxxx,toshi.kani@xxxxxx,trenn@xxxxxxx,wency@xxxxxxxxxxxxxx,yinghai@xxxxxxxxxx,zhangyanfei@xxxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Fri, 11 Oct 2013 13:39:06 -0700
The patch titled
Subject: mm/memblock.c: factor out of top-down allocation
has been added to the -mm tree. Its filename is
memblock-factor-out-of-top-down-allocation.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/memblock-factor-out-of-top-down-allocation.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/memblock-factor-out-of-top-down-allocation.patch
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From: Tang Chen <tangchen@xxxxxxxxxxxxxx>
Subject: mm/memblock.c: factor out of top-down allocation
Create a new function __memblock_find_range_top_down to factor out of
top-down allocation from memblock_find_in_range_node. This is a
preparation because we will introduce a new bottom-up allocation mode in
the following patch.
Signed-off-by: Tang Chen <tangchen@xxxxxxxxxxxxxx>
Signed-off-by: Zhang Yanfei <zhangyanfei@xxxxxxxxxxxxxx>
Acked-by: Tejun Heo <tj@xxxxxxxxxx>
Acked-by: Toshi Kani <toshi.kani@xxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Wanpeng Li <liwanp@xxxxxxxxxxxxxxxxxx>
Cc: Thomas Renninger <trenn@xxxxxxx>
Cc: Yinghai Lu <yinghai@xxxxxxxxxx>
Cc: Jiang Liu <jiang.liu@xxxxxxxxxx>
Cc: Wen Congyang <wency@xxxxxxxxxxxxxx>
Cc: Lai Jiangshan <laijs@xxxxxxxxxxxxxx>
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx>
Cc: Taku Izumi <izumi.taku@xxxxxxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Michal Nazarewicz <mina86@xxxxxxxxxx
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memblock.c | 47 ++++++++++++++++++++++++++++++++++-------------
1 file changed, 34 insertions(+), 13 deletions(-)
diff -puN mm/memblock.c~memblock-factor-out-of-top-down-allocation mm/memblock.c
--- a/mm/memblock.c~memblock-factor-out-of-top-down-allocation
+++ a/mm/memblock.c
@@ -83,33 +83,25 @@ static long __init_memblock memblock_ove
}
/**
- * memblock_find_in_range_node - find free area in given range and node
+ * __memblock_find_range_top_down - find free area utility, in top-down
* @start: start of candidate range
* @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE}
* @size: size of free area to find
* @align: alignment of free area to find
* @nid: nid of the free area to find, %MAX_NUMNODES for any node
*
- * Find @size free area aligned to @align in the specified range and node.
+ * Utility called from memblock_find_in_range_node(), find free area top-down.
*
* RETURNS:
* Found address on success, %0 on failure.
*/
-phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t start,
- phys_addr_t end, phys_addr_t size,
- phys_addr_t align, int nid)
+static phys_addr_t __init_memblock
+__memblock_find_range_top_down(phys_addr_t start, phys_addr_t end,
+ phys_addr_t size, phys_addr_t align, int nid)
{
phys_addr_t this_start, this_end, cand;
u64 i;
- /* pump up @end */
- if (end == MEMBLOCK_ALLOC_ACCESSIBLE)
- end = memblock.current_limit;
-
- /* avoid allocating the first page */
- start = max_t(phys_addr_t, start, PAGE_SIZE);
- end = max(start, end);
-
for_each_free_mem_range_reverse(i, nid, &this_start, &this_end, NULL) {
this_start = clamp(this_start, start, end);
this_end = clamp(this_end, start, end);
@@ -121,10 +113,39 @@ phys_addr_t __init_memblock memblock_fin
if (cand >= this_start)
return cand;
}
+
return 0;
}
/**
+ * memblock_find_in_range_node - find free area in given range and node
+ * @start: start of candidate range
+ * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE}
+ * @size: size of free area to find
+ * @align: alignment of free area to find
+ * @nid: nid of the free area to find, %MAX_NUMNODES for any node
+ *
+ * Find @size free area aligned to @align in the specified range and node.
+ *
+ * RETURNS:
+ * Found address on success, %0 on failure.
+ */
+phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t start,
+ phys_addr_t end, phys_addr_t size,
+ phys_addr_t align, int nid)
+{
+ /* pump up @end */
+ if (end == MEMBLOCK_ALLOC_ACCESSIBLE)
+ end = memblock.current_limit;
+
+ /* avoid allocating the first page */
+ start = max_t(phys_addr_t, start, PAGE_SIZE);
+ end = max(start, end);
+
+ return __memblock_find_range_top_down(start, end, size, align, nid);
+}
+
+/**
* memblock_find_in_range - find free area in given range
* @start: start of candidate range
* @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE}
_
Patches currently in -mm which might be from tangchen@xxxxxxxxxxxxxx are
mm-sparsemem-use-pages_per_section-to-remove-redundant-nr_pages-parameter.patch
mm-sparsemem-fix-a-bug-in-free_map_bootmem-when-config_sparsemem_vmemmap.patch
mm-sparsemem-fix-a-bug-in-free_map_bootmem-when-config_sparsemem_vmemmap-v2.patch
memblock-factor-out-of-top-down-allocation.patch
memblock-introduce-bottom-up-allocation-mode.patch
x86-mm-factor-out-of-top-down-direct-mapping-setup.patch
x86-mem-hotplug-support-initialize-page-tables-in-bottom-up.patch
x86-acpi-crash-kdump-do-reserve_crashkernel-after-srat-is-parsed.patch
mem-hotplug-introduce-movable_node-boot-option.patch
linux-next.patch
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