ARM: mm: Could I change module space size or place modules in vmalloc area?
From: Gioh Kim <hidden>
Date: 2014-01-02 10:04:21
Also in:
linux-mm
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
Hi, I run out of module space because I have several big driver modules. I know I can strip the modules to decrease size but I need debug info now. The default size of module is 16MB and the size is statically defined in the header file. But a description for the module space size tells that it can be configurable at most 32MB. I have changed the module space size to 18MB and tested my platform. It has been looking good. I am not sure my patch is proper solution. Anyway, could I configure the module space size? Or could I place the modules into vmalloc area? Signed-off-by: Gioh Kim <redacted> --- arch/arm/Kconfig | 4 ++++ arch/arm/include/asm/memory.h | 10 +++++++--- 2 files changed, 11 insertions(+), 3 deletions(-)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index c1f1a7e..cf1fb55100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig@@ -2257,6 +2257,10 @@ config ARM_CPU_SUSPEND endmenu +config MODULES_AREA_SIZE + int + default 0x1000000 + source "net/Kconfig" source "drivers/Kconfig"
diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
index 6976b03..3396758 100644
--- a/arch/arm/include/asm/memory.h
+++ b/arch/arm/include/asm/memory.h@@ -32,13 +32,17 @@ #ifdef CONFIG_MMU +#if CONFIG_MODULES_AREA_SIZE > SZ_32M +#error Too much space for modules +#endif + /* * PAGE_OFFSET - the virtual address of the start of the kernel image * TASK_SIZE - the maximum size of a user space task. * TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area */ -#define PAGE_OFFSET UL(CONFIG_PAGE_OFFSET) -#define TASK_SIZE (UL(CONFIG_PAGE_OFFSET) - UL(SZ_16M)) +#define PAGE_OFFSET UL(CONFIG_PAGE_OFFSET) +#define TASK_SIZE (UL(CONFIG_PAGE_OFFSET) -
UL(CONFIG_MODULES_AREA_SIZE)) #define TASK_UNMAPPED_BASE ALIGN(TASK_SIZE / 3, SZ_16M) /*
@@ -51,7 +55,7 @@ * and PAGE_OFFSET - it must be within 32MB of the kernel text. */ #ifndef CONFIG_THUMB2_KERNEL -#define MODULES_VADDR (PAGE_OFFSET - SZ_16M) +#define MODULES_VADDR (PAGE_OFFSET - CONFIG_MODULES_AREA_SIZE) #else /* smaller range for Thumb-2 symbols relocation (2^24)*/ #define MODULES_VADDR (PAGE_OFFSET - SZ_8M) --
1.7.9.5