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Message-Id: <c06b578a03cc1735c52a3580935bcb627d9c4ade.1431103461.git.tony.luck@intel.com>
Date: Thu, 7 May 2015 15:17:21 -0700
From: Tony Luck <tony.luck@...el.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: [PATCHv2 1/3] mm/memblock: Add extra "flags" to memblock to allow
selection of memory based on attribute
No functional changes
Signed-off-by: Tony Luck <tony.luck@...el.com>
---
v1->v2:
Use name "flags" everywhere instead of mix of "flag" and "flags"
Change type of flags from u32 to ulong (consistent with memblock_region.flags)
Use enum for values of flags defining MEMBLOCK_NONE = 0 and use as argument
arch/s390/kernel/crash_dump.c | 5 ++--
arch/sparc/mm/init_64.c | 6 +++--
arch/x86/kernel/check.c | 3 ++-
arch/x86/kernel/e820.c | 3 ++-
arch/x86/mm/init_32.c | 2 +-
include/linux/memblock.h | 41 ++++++++++++++++++++------------
mm/cma.c | 6 +++--
mm/memblock.c | 55 +++++++++++++++++++++++++++----------------
mm/memtest.c | 3 ++-
mm/nobootmem.c | 6 +++--
10 files changed, 83 insertions(+), 47 deletions(-)
diff --git a/arch/s390/kernel/crash_dump.c b/arch/s390/kernel/crash_dump.c
index 9f73c8059022..120a18283483 100644
--- a/arch/s390/kernel/crash_dump.c
+++ b/arch/s390/kernel/crash_dump.c
@@ -33,11 +33,12 @@ static struct memblock_type oldmem_type = {
};
#define for_each_dump_mem_range(i, nid, p_start, p_end, p_nid) \
- for (i = 0, __next_mem_range(&i, nid, &memblock.physmem, \
+ for (i = 0, __next_mem_range(&i, nid, MEMBLOCK_NONE, \
+ &memblock.physmem, \
&oldmem_type, p_start, \
p_end, p_nid); \
i != (u64)ULLONG_MAX; \
- __next_mem_range(&i, nid, &memblock.physmem, \
+ __next_mem_range(&i, nid, MEMBLOCK_NONE, &memblock.physmem,\
&oldmem_type, \
p_start, p_end, p_nid))
diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index 4ca0d6ba5ec8..6f662d1d92ae 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -1952,7 +1952,8 @@ static phys_addr_t __init available_memory(void)
phys_addr_t pa_start, pa_end;
u64 i;
- for_each_free_mem_range(i, NUMA_NO_NODE, &pa_start, &pa_end, NULL)
+ for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE, &pa_start,
+ &pa_end, NULL)
available = available + (pa_end - pa_start);
return available;
@@ -1971,7 +1972,8 @@ static void __init reduce_memory(phys_addr_t limit_ram)
if (limit_ram >= avail_ram)
return;
- for_each_free_mem_range(i, NUMA_NO_NODE, &pa_start, &pa_end, NULL) {
+ for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE, &pa_start,
+ &pa_end, NULL) {
phys_addr_t region_size = pa_end - pa_start;
phys_addr_t clip_start = pa_start;
diff --git a/arch/x86/kernel/check.c b/arch/x86/kernel/check.c
index 83a7995625a6..58118e207a69 100644
--- a/arch/x86/kernel/check.c
+++ b/arch/x86/kernel/check.c
@@ -91,7 +91,8 @@ void __init setup_bios_corruption_check(void)
corruption_check_size = round_up(corruption_check_size, PAGE_SIZE);
- for_each_free_mem_range(i, NUMA_NO_NODE, &start, &end, NULL) {
+ for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end,
+ NULL) {
start = clamp_t(phys_addr_t, round_up(start, PAGE_SIZE),
PAGE_SIZE, corruption_check_size);
end = clamp_t(phys_addr_t, round_down(end, PAGE_SIZE),
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index e2ce85db2283..c8dda42cb6a3 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -1123,7 +1123,8 @@ void __init memblock_find_dma_reserve(void)
nr_pages += end_pfn - start_pfn;
}
- for_each_free_mem_range(u, NUMA_NO_NODE, &start, &end, NULL) {
+ for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end,
+ NULL) {
start_pfn = min_t(unsigned long, PFN_UP(start), MAX_DMA_PFN);
end_pfn = min_t(unsigned long, PFN_DOWN(end), MAX_DMA_PFN);
if (start_pfn < end_pfn)
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index c8140e12816a..8340e45c891a 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -433,7 +433,7 @@ void __init add_highpages_with_active_regions(int nid,
phys_addr_t start, end;
u64 i;
- for_each_free_mem_range(i, nid, &start, &end, NULL) {
+ for_each_free_mem_range(i, nid, MEMBLOCK_NONE, &start, &end, NULL) {
unsigned long pfn = clamp_t(unsigned long, PFN_UP(start),
start_pfn, end_pfn);
unsigned long e_pfn = clamp_t(unsigned long, PFN_DOWN(end),
diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index 9497ec7c77ea..7aeec0cb4c27 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -21,7 +21,10 @@
#define INIT_PHYSMEM_REGIONS 4
/* Definition of memblock flags. */
-#define MEMBLOCK_HOTPLUG 0x1 /* hotpluggable region */
+enum {
+ MEMBLOCK_NONE = 0x0, /* No special request */
+ MEMBLOCK_HOTPLUG = 0x1, /* hotpluggable region */
+};
struct memblock_region {
phys_addr_t base;
@@ -61,7 +64,7 @@ extern bool movable_node_enabled;
phys_addr_t memblock_find_in_range_node(phys_addr_t size, phys_addr_t align,
phys_addr_t start, phys_addr_t end,
- int nid);
+ int nid, ulong flags);
phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end,
phys_addr_t size, phys_addr_t align);
phys_addr_t get_allocated_memblock_reserved_regions_info(phys_addr_t *addr);
@@ -85,11 +88,13 @@ int memblock_remove_range(struct memblock_type *type,
phys_addr_t base,
phys_addr_t size);
-void __next_mem_range(u64 *idx, int nid, struct memblock_type *type_a,
+void __next_mem_range(u64 *idx, int nid, ulong flags,
+ struct memblock_type *type_a,
struct memblock_type *type_b, phys_addr_t *out_start,
phys_addr_t *out_end, int *out_nid);
-void __next_mem_range_rev(u64 *idx, int nid, struct memblock_type *type_a,
+void __next_mem_range_rev(u64 *idx, int nid, ulong flags,
+ struct memblock_type *type_a,
struct memblock_type *type_b, phys_addr_t *out_start,
phys_addr_t *out_end, int *out_nid);
@@ -100,16 +105,17 @@ void __next_mem_range_rev(u64 *idx, int nid, struct memblock_type *type_a,
* @type_a: ptr to memblock_type to iterate
* @type_b: ptr to memblock_type which excludes from the iteration
* @nid: node selector, %NUMA_NO_NODE for all nodes
+ * @flags: pick from blocks based on memory attributes
* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
* @p_nid: ptr to int for nid of the range, can be %NULL
*/
-#define for_each_mem_range(i, type_a, type_b, nid, \
+#define for_each_mem_range(i, type_a, type_b, nid, flags, \
p_start, p_end, p_nid) \
- for (i = 0, __next_mem_range(&i, nid, type_a, type_b, \
+ for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b, \
p_start, p_end, p_nid); \
i != (u64)ULLONG_MAX; \
- __next_mem_range(&i, nid, type_a, type_b, \
+ __next_mem_range(&i, nid, flags, type_a, type_b, \
p_start, p_end, p_nid))
/**
@@ -119,17 +125,18 @@ void __next_mem_range_rev(u64 *idx, int nid, struct memblock_type *type_a,
* @type_a: ptr to memblock_type to iterate
* @type_b: ptr to memblock_type which excludes from the iteration
* @nid: node selector, %NUMA_NO_NODE for all nodes
+ * @flags: pick from blocks based on memory attributes
* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
* @p_nid: ptr to int for nid of the range, can be %NULL
*/
-#define for_each_mem_range_rev(i, type_a, type_b, nid, \
+#define for_each_mem_range_rev(i, type_a, type_b, nid, flags, \
p_start, p_end, p_nid) \
for (i = (u64)ULLONG_MAX, \
- __next_mem_range_rev(&i, nid, type_a, type_b, \
+ __next_mem_range_rev(&i, nid, flags, type_a, type_b,\
p_start, p_end, p_nid); \
i != (u64)ULLONG_MAX; \
- __next_mem_range_rev(&i, nid, type_a, type_b, \
+ __next_mem_range_rev(&i, nid, flags, type_a, type_b, \
p_start, p_end, p_nid))
#ifdef CONFIG_MOVABLE_NODE
@@ -181,13 +188,14 @@ void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn,
* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
* @p_nid: ptr to int for nid of the range, can be %NULL
+ * @flags: pick from blocks based on memory attributes
*
* Walks over free (memory && !reserved) areas of memblock. Available as
* soon as memblock is initialized.
*/
-#define for_each_free_mem_range(i, nid, p_start, p_end, p_nid) \
+#define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \
for_each_mem_range(i, &memblock.memory, &memblock.reserved, \
- nid, p_start, p_end, p_nid)
+ nid, flags, p_start, p_end, p_nid)
/**
* for_each_free_mem_range_reverse - rev-iterate through free memblock areas
@@ -196,13 +204,15 @@ void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn,
* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
* @p_nid: ptr to int for nid of the range, can be %NULL
+ * @flags: pick from blocks based on memory attributes
*
* Walks over free (memory && !reserved) areas of memblock in reverse
* order. Available as soon as memblock is initialized.
*/
-#define for_each_free_mem_range_reverse(i, nid, p_start, p_end, p_nid) \
+#define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \
+ p_nid) \
for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \
- nid, p_start, p_end, p_nid)
+ nid, flags, p_start, p_end, p_nid)
static inline void memblock_set_region_flags(struct memblock_region *r,
unsigned long flags)
@@ -273,7 +283,8 @@ static inline bool memblock_bottom_up(void) { return false; }
#define MEMBLOCK_ALLOC_ACCESSIBLE 0
phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align,
- phys_addr_t start, phys_addr_t end);
+ phys_addr_t start, phys_addr_t end,
+ ulong flags);
phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
phys_addr_t max_addr);
phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
diff --git a/mm/cma.c b/mm/cma.c
index 3a7a67b93394..3ba03d7ab169 100644
--- a/mm/cma.c
+++ b/mm/cma.c
@@ -316,13 +316,15 @@ int __init cma_declare_contiguous(phys_addr_t base,
*/
if (base < highmem_start && limit > highmem_start) {
addr = memblock_alloc_range(size, alignment,
- highmem_start, limit);
+ highmem_start, limit,
+ MEMBLOCK_NONE);
limit = highmem_start;
}
if (!addr) {
addr = memblock_alloc_range(size, alignment, base,
- limit);
+ limit,
+ MEMBLOCK_NONE);
if (!addr) {
ret = -ENOMEM;
goto err;
diff --git a/mm/memblock.c b/mm/memblock.c
index 9318b567ed79..b9ff2f4f0285 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -107,6 +107,7 @@ static long __init_memblock memblock_overlaps_region(struct memblock_type *type,
* @size: size of free area to find
* @align: alignment of free area to find
* @nid: nid of the free area to find, %NUMA_NO_NODE for any node
+ * @flags: pick from blocks based on memory attributes
*
* Utility called from memblock_find_in_range_node(), find free area bottom-up.
*
@@ -115,12 +116,13 @@ static long __init_memblock memblock_overlaps_region(struct memblock_type *type,
*/
static phys_addr_t __init_memblock
__memblock_find_range_bottom_up(phys_addr_t start, phys_addr_t end,
- phys_addr_t size, phys_addr_t align, int nid)
+ phys_addr_t size, phys_addr_t align, int nid,
+ ulong flags)
{
phys_addr_t this_start, this_end, cand;
u64 i;
- for_each_free_mem_range(i, nid, &this_start, &this_end, NULL) {
+ for_each_free_mem_range(i, nid, flags, &this_start, &this_end, NULL) {
this_start = clamp(this_start, start, end);
this_end = clamp(this_end, start, end);
@@ -139,6 +141,7 @@ __memblock_find_range_bottom_up(phys_addr_t start, phys_addr_t end,
* @size: size of free area to find
* @align: alignment of free area to find
* @nid: nid of the free area to find, %NUMA_NO_NODE for any node
+ * @flags: pick from blocks based on memory attributes
*
* Utility called from memblock_find_in_range_node(), find free area top-down.
*
@@ -147,12 +150,14 @@ __memblock_find_range_bottom_up(phys_addr_t start, phys_addr_t end,
*/
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 size, phys_addr_t align, int nid,
+ ulong flags)
{
phys_addr_t this_start, this_end, cand;
u64 i;
- for_each_free_mem_range_reverse(i, nid, &this_start, &this_end, NULL) {
+ for_each_free_mem_range_reverse(i, nid, flags, &this_start, &this_end,
+ NULL) {
this_start = clamp(this_start, start, end);
this_end = clamp(this_end, start, end);
@@ -174,6 +179,7 @@ __memblock_find_range_top_down(phys_addr_t start, phys_addr_t end,
* @start: start of candidate range
* @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE}
* @nid: nid of the free area to find, %NUMA_NO_NODE for any node
+ * @flags: pick from blocks based on memory attributes
*
* Find @size free area aligned to @align in the specified range and node.
*
@@ -190,7 +196,7 @@ __memblock_find_range_top_down(phys_addr_t start, phys_addr_t end,
*/
phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t size,
phys_addr_t align, phys_addr_t start,
- phys_addr_t end, int nid)
+ phys_addr_t end, int nid, ulong flags)
{
phys_addr_t kernel_end, ret;
@@ -215,7 +221,7 @@ phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t size,
/* ok, try bottom-up allocation first */
ret = __memblock_find_range_bottom_up(bottom_up_start, end,
- size, align, nid);
+ size, align, nid, flags);
if (ret)
return ret;
@@ -233,7 +239,8 @@ phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t size,
"memory hotunplug may be affected\n");
}
- return __memblock_find_range_top_down(start, end, size, align, nid);
+ return __memblock_find_range_top_down(start, end, size, align, nid,
+ flags);
}
/**
@@ -253,7 +260,7 @@ phys_addr_t __init_memblock memblock_find_in_range(phys_addr_t start,
phys_addr_t align)
{
return memblock_find_in_range_node(size, align, start, end,
- NUMA_NO_NODE);
+ NUMA_NO_NODE, MEMBLOCK_NONE);
}
static void __init_memblock memblock_remove_region(struct memblock_type *type, unsigned long r)
@@ -782,6 +789,7 @@ int __init_memblock memblock_clear_hotplug(phys_addr_t base, phys_addr_t size)
* __next__mem_range - next function for for_each_free_mem_range() etc.
* @idx: pointer to u64 loop variable
* @nid: node selector, %NUMA_NO_NODE for all nodes
+ * @flags: pick from blocks based on memory attributes
* @type_a: pointer to memblock_type from where the range is taken
* @type_b: pointer to memblock_type which excludes memory from being taken
* @out_start: ptr to phys_addr_t for start address of the range, can be %NULL
@@ -803,7 +811,7 @@ int __init_memblock memblock_clear_hotplug(phys_addr_t base, phys_addr_t size)
* As both region arrays are sorted, the function advances the two indices
* in lockstep and returns each intersection.
*/
-void __init_memblock __next_mem_range(u64 *idx, int nid,
+void __init_memblock __next_mem_range(u64 *idx, int nid, ulong flags,
struct memblock_type *type_a,
struct memblock_type *type_b,
phys_addr_t *out_start,
@@ -895,6 +903,7 @@ void __init_memblock __next_mem_range(u64 *idx, int nid,
*
* @idx: pointer to u64 loop variable
* @nid: nid: node selector, %NUMA_NO_NODE for all nodes
+ * @flags: pick from blocks based on memory attributes
* @type_a: pointer to memblock_type from where the range is taken
* @type_b: pointer to memblock_type which excludes memory from being taken
* @out_start: ptr to phys_addr_t for start address of the range, can be %NULL
@@ -903,7 +912,7 @@ void __init_memblock __next_mem_range(u64 *idx, int nid,
*
* Reverse of __next_mem_range().
*/
-void __init_memblock __next_mem_range_rev(u64 *idx, int nid,
+void __init_memblock __next_mem_range_rev(u64 *idx, int nid, ulong flags,
struct memblock_type *type_a,
struct memblock_type *type_b,
phys_addr_t *out_start,
@@ -1050,14 +1059,15 @@ int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size,
static phys_addr_t __init memblock_alloc_range_nid(phys_addr_t size,
phys_addr_t align, phys_addr_t start,
- phys_addr_t end, int nid)
+ phys_addr_t end, int nid, ulong flags)
{
phys_addr_t found;
if (!align)
align = SMP_CACHE_BYTES;
- found = memblock_find_in_range_node(size, align, start, end, nid);
+ found = memblock_find_in_range_node(size, align, start, end, nid,
+ flags);
if (found && !memblock_reserve(found, size)) {
/*
* The min_count is set to 0 so that memblock allocations are
@@ -1070,26 +1080,30 @@ static phys_addr_t __init memblock_alloc_range_nid(phys_addr_t size,
}
phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align,
- phys_addr_t start, phys_addr_t end)
+ phys_addr_t start, phys_addr_t end,
+ ulong flags)
{
- return memblock_alloc_range_nid(size, align, start, end, NUMA_NO_NODE);
+ return memblock_alloc_range_nid(size, align, start, end, NUMA_NO_NODE,
+ flags);
}
static phys_addr_t __init memblock_alloc_base_nid(phys_addr_t size,
phys_addr_t align, phys_addr_t max_addr,
- int nid)
+ int nid, ulong flags)
{
- return memblock_alloc_range_nid(size, align, 0, max_addr, nid);
+ return memblock_alloc_range_nid(size, align, 0, max_addr, nid, flags);
}
phys_addr_t __init memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid)
{
- return memblock_alloc_base_nid(size, align, MEMBLOCK_ALLOC_ACCESSIBLE, nid);
+ return memblock_alloc_base_nid(size, align, MEMBLOCK_ALLOC_ACCESSIBLE,
+ nid, MEMBLOCK_NONE);
}
phys_addr_t __init __memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr)
{
- return memblock_alloc_base_nid(size, align, max_addr, NUMA_NO_NODE);
+ return memblock_alloc_base_nid(size, align, max_addr, NUMA_NO_NODE,
+ MEMBLOCK_NONE);
}
phys_addr_t __init memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr)
@@ -1173,13 +1187,14 @@ static void * __init memblock_virt_alloc_internal(
again:
alloc = memblock_find_in_range_node(size, align, min_addr, max_addr,
- nid);
+ nid, MEMBLOCK_NONE);
if (alloc)
goto done;
if (nid != NUMA_NO_NODE) {
alloc = memblock_find_in_range_node(size, align, min_addr,
- max_addr, NUMA_NO_NODE);
+ max_addr, NUMA_NO_NODE,
+ MEMBLOCK_NONE);
if (alloc)
goto done;
}
diff --git a/mm/memtest.c b/mm/memtest.c
index 1997d934b13b..0a1cc133f6d7 100644
--- a/mm/memtest.c
+++ b/mm/memtest.c
@@ -74,7 +74,8 @@ static void __init do_one_pass(u64 pattern, phys_addr_t start, phys_addr_t end)
u64 i;
phys_addr_t this_start, this_end;
- for_each_free_mem_range(i, NUMA_NO_NODE, &this_start, &this_end, NULL) {
+ for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE, &this_start,
+ &this_end, NULL) {
this_start = clamp(this_start, start, end);
this_end = clamp(this_end, start, end);
if (this_start < this_end) {
diff --git a/mm/nobootmem.c b/mm/nobootmem.c
index 90b50468333e..ad3641dcdbe7 100644
--- a/mm/nobootmem.c
+++ b/mm/nobootmem.c
@@ -41,7 +41,8 @@ static void * __init __alloc_memory_core_early(int nid, u64 size, u64 align,
if (limit > memblock.current_limit)
limit = memblock.current_limit;
- addr = memblock_find_in_range_node(size, align, goal, limit, nid);
+ addr = memblock_find_in_range_node(size, align, goal, limit, nid,
+ MEMBLOCK_NONE);
if (!addr)
return NULL;
@@ -121,7 +122,8 @@ static unsigned long __init free_low_memory_core_early(void)
memblock_clear_hotplug(0, -1);
- for_each_free_mem_range(i, NUMA_NO_NODE, &start, &end, NULL)
+ for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end,
+ NULL)
count += __free_memory_core(start, end);
#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
--
2.1.4
--
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