[V5 PATCH 24/26] memblock: limit memory address from memblock
From: Yasuaki Ishimatsu
Setting kernelcore_max_pfn means all memory which is bigger than
the boot parameter is allocated as ZONE_MOVABLE. So memory which
is allocated by memblock also should be limited by the parameter.
The patch limits memory from memblock.
Signed-off-by: Yasuaki Ishimatsu
Signed-off-by: Lai Jiangshan
---
include/linux/memblock.h |1 +
mm/memblock.c|5 -
mm/page_alloc.c |6 +-
3 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index d452ee1..3e52911 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -42,6 +42,7 @@ struct memblock {
extern struct memblock memblock;
extern int memblock_debug;
+extern phys_addr_t memblock_limit;
#define memblock_dbg(fmt, ...) \
if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
diff --git a/mm/memblock.c b/mm/memblock.c
index 6259055..ee2e307 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -957,7 +957,10 @@ void __init_memblock memblock_trim_memory(phys_addr_t
align)
void __init_memblock memblock_set_current_limit(phys_addr_t limit)
{
- memblock.current_limit = limit;
+ if (!memblock_limit || (memblock_limit > limit))
+ memblock.current_limit = limit;
+ else
+ memblock.current_limit = memblock_limit;
}
static void __init_memblock memblock_dump(struct memblock_type *type, char
*name)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 11df8b5..f76b696 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -208,6 +208,8 @@ static unsigned long __initdata required_kernelcore;
static unsigned long __initdata required_movablecore;
static unsigned long __meminitdata zone_movable_pfn[MAX_NUMNODES];
+phys_addr_t memblock_limit;
+
/* movable_zone is the "real" zone pages in ZONE_MOVABLE are taken from */
int movable_zone;
EXPORT_SYMBOL(movable_zone);
@@ -4976,7 +4978,9 @@ static int __init cmdline_parse_core(char *p, unsigned
long *core)
*/
static int __init cmdline_parse_kernelcore_max_addr(char *p)
{
- return cmdline_parse_core(p, _kernelcore_max_pfn);
+ cmdline_parse_core(p, _kernelcore_max_pfn);
+ memblock_limit = required_kernelcore_max_pfn << PAGE_SHIFT;
+ return 0;
}
early_param("kernelcore_max_addr", cmdline_parse_kernelcore_max_addr);
#endif
--
1.7.4.4
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[V5 PATCH 24/26] memblock: limit memory address from memblock
From: Yasuaki Ishimatsu isimatu.yasu...@jp.fujitsu.com
Setting kernelcore_max_pfn means all memory which is bigger than
the boot parameter is allocated as ZONE_MOVABLE. So memory which
is allocated by memblock also should be limited by the parameter.
The patch limits memory from memblock.
Signed-off-by: Yasuaki Ishimatsu isimatu.yasu...@jp.fujitsu.com
Signed-off-by: Lai Jiangshan la...@cn.fujitsu.com
---
include/linux/memblock.h |1 +
mm/memblock.c|5 -
mm/page_alloc.c |6 +-
3 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index d452ee1..3e52911 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -42,6 +42,7 @@ struct memblock {
extern struct memblock memblock;
extern int memblock_debug;
+extern phys_addr_t memblock_limit;
#define memblock_dbg(fmt, ...) \
if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
diff --git a/mm/memblock.c b/mm/memblock.c
index 6259055..ee2e307 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -957,7 +957,10 @@ void __init_memblock memblock_trim_memory(phys_addr_t
align)
void __init_memblock memblock_set_current_limit(phys_addr_t limit)
{
- memblock.current_limit = limit;
+ if (!memblock_limit || (memblock_limit limit))
+ memblock.current_limit = limit;
+ else
+ memblock.current_limit = memblock_limit;
}
static void __init_memblock memblock_dump(struct memblock_type *type, char
*name)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 11df8b5..f76b696 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -208,6 +208,8 @@ static unsigned long __initdata required_kernelcore;
static unsigned long __initdata required_movablecore;
static unsigned long __meminitdata zone_movable_pfn[MAX_NUMNODES];
+phys_addr_t memblock_limit;
+
/* movable_zone is the real zone pages in ZONE_MOVABLE are taken from */
int movable_zone;
EXPORT_SYMBOL(movable_zone);
@@ -4976,7 +4978,9 @@ static int __init cmdline_parse_core(char *p, unsigned
long *core)
*/
static int __init cmdline_parse_kernelcore_max_addr(char *p)
{
- return cmdline_parse_core(p, required_kernelcore_max_pfn);
+ cmdline_parse_core(p, required_kernelcore_max_pfn);
+ memblock_limit = required_kernelcore_max_pfn PAGE_SHIFT;
+ return 0;
}
early_param(kernelcore_max_addr, cmdline_parse_kernelcore_max_addr);
#endif
--
1.7.4.4
--
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