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mm: Add pending configuration for mm node struct and precding

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pending memory block node precding and the entire struct, after turning on this bit, the size of each memory block wil be aligned to MM_ALIGN

Signed-off-by: wangmingrong1 <wangmingrong1@xiaomi.com>
This commit is contained in:
wangmingrong1 2025-01-10 11:47:42 +08:00
parent 3e6649856b
commit 0f70c44b4a
2 changed files with 39 additions and 3 deletions
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8
mm/Kconfig
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@ -69,6 +69,14 @@ config MM_DEFAULT_ALIGNMENT
memory default alignment is equal to sizoef(uintptr), if this value
is not 0, this value must be 2^n and at least sizeof(uintptr).
config MM_NODE_PENDING
bool "Enable pending memory node"
default n
---help---
Pending memory block node precding and the entire struct,
After turning on this bit, the size of each memory block
will be aligned to MM_ALIGN
config MM_SMALL
bool "Small memory model"
default n

34
mm/mm_heap/mm.h
View file

@ -143,7 +143,17 @@
* previous freenode
*/
#define MM_ALLOCNODE_OVERHEAD (MM_SIZEOF_ALLOCNODE - sizeof(mmsize_t))
#ifdef CONFIG_MM_NODE_PENDING
# define MM_NODE_STRUCT_PENDING aligned_data(MM_ALIGN)
#else
# define MM_NODE_STRUCT_PENDING
#endif
#ifdef CONFIG_MM_NODE_PENDING
# define MM_ALLOCNODE_OVERHEAD (MM_SIZEOF_ALLOCNODE - MM_ALIGN)
#else
# define MM_ALLOCNODE_OVERHEAD (MM_SIZEOF_ALLOCNODE - sizeof(mmsize_t))
#endif
/* Get the node size */
@ -173,7 +183,16 @@ typedef size_t mmsize_t;
struct mm_allocnode_s
{
#ifdef CONFIG_MM_NODE_PENDING
union
{
mmsize_t preceding; /* Physical preceding chunk size */
uint8_t align[MM_ALIGN];
};
#else
mmsize_t preceding; /* Physical preceding chunk size */
#endif
mmsize_t size; /* Size of this chunk */
#if CONFIG_MM_BACKTRACE >= 0
pid_t pid; /* The pid for caller */
@ -182,13 +201,22 @@ struct mm_allocnode_s
FAR void *backtrace[CONFIG_MM_BACKTRACE]; /* The backtrace buffer for caller */
# endif
#endif
};
}MM_NODE_STRUCT_PENDING;
/* This describes a free chunk */
struct mm_freenode_s
{
#ifdef CONFIG_MM_NODE_PENDING
union
{
mmsize_t preceding; /* Physical preceding chunk size */
uint8_t align[MM_ALIGN];
};
#else
mmsize_t preceding; /* Physical preceding chunk size */
#endif
mmsize_t size; /* Size of this chunk */
#if CONFIG_MM_BACKTRACE >= 0
pid_t pid; /* The pid for caller */
@ -199,7 +227,7 @@ struct mm_freenode_s
#endif
FAR struct mm_freenode_s *flink; /* Supports a doubly linked list */
FAR struct mm_freenode_s *blink;
};
}MM_NODE_STRUCT_PENDING;
static_assert(MM_SIZEOF_ALLOCNODE <= MM_MIN_CHUNK,
"Error size for struct mm_allocnode_s\n");