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The following commit(s) were added to refs/heads/master by this push:
new 3e971d2e6d mm_heap: double malloced memory default alignment (4 -> 8,
8 -> 16)
3e971d2e6d is described below
commit 3e971d2e6d753519985a3e044d4dd21026ec1d12
Author: wangbowen6 <[email protected]>
AuthorDate: Mon Mar 6 16:10:31 2023 +0800
mm_heap: double malloced memory default alignment (4 -> 8, 8 -> 16)
Base on the gnu libc standard:
https://www.gnu.org/software/libc/manual/html_node/Aligned-Memory-Blocks.html
Change the default memory aligment to 8 bytes for 32-bit system and
16 bytes for 64-bit system.
Signed-off-by: wangbowen6 <[email protected]>
---
mm/Kconfig | 2 +-
mm/mm_heap/mm.h | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/mm/Kconfig b/mm/Kconfig
index 71a95c80fa..6d702f7629 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -63,7 +63,7 @@ config MM_KERNEL_HEAPSIZE
config MM_DFAULT_ALIGNMENT
int "Memory default alignment in bytes"
- default 8
+ default 0
range 0 64
---help---
The memory default alignment in bytes, if this value is 0, the
real
diff --git a/mm/mm_heap/mm.h b/mm/mm_heap/mm.h
index adc6f24d28..c787ace6af 100644
--- a/mm/mm_heap/mm.h
+++ b/mm/mm_heap/mm.h
@@ -111,7 +111,7 @@
#define MM_NNODES (MM_MAX_SHIFT - MM_MIN_SHIFT + 1)
#if CONFIG_MM_DFAULT_ALIGNMENT == 0
-# define MM_ALIGN sizeof(uintptr_t)
+# define MM_ALIGN (2 * sizeof(uintptr_t))
#else
# define MM_ALIGN CONFIG_MM_DFAULT_ALIGNMENT
#endif
