diff options
author | Mike Frysinger <vapier.adi@gmail.com> | 2008-02-02 15:53:17 +0800 |
---|---|---|
committer | Bryan Wu <bryan.wu@analog.com> | 2008-02-02 15:53:17 +0800 |
commit | b7627acc432a36072253bb1288f56e78c7d9423e (patch) | |
tree | 1d79f1c3a68c21ec1b51428a88d8f5149dbbbbf4 /arch/blackfin/kernel/vmlinux.lds.S | |
parent | 80f31c8a03d2f0644d0ceaf14e7e0108a007c962 (diff) | |
download | linux-b7627acc432a36072253bb1288f56e78c7d9423e.tar.bz2 |
[Blackfin] arch: move the init sections to the end of memory
Move the init sections to the end of memory so that after they
are free, run time memory is all continugous - this should help decrease
memory fragementation.
When doing this, we also pack some of the other sections a little closer
together, to make sure we don't waste memory. To make this happen,
we need to rename the .data.init_task section to .init_task.data, so
it doesn't get picked up by the linker script glob.
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Diffstat (limited to 'arch/blackfin/kernel/vmlinux.lds.S')
-rw-r--r-- | arch/blackfin/kernel/vmlinux.lds.S | 47 |
1 files changed, 28 insertions, 19 deletions
diff --git a/arch/blackfin/kernel/vmlinux.lds.S b/arch/blackfin/kernel/vmlinux.lds.S index 858722421b40..aed832540b3b 100644 --- a/arch/blackfin/kernel/vmlinux.lds.S +++ b/arch/blackfin/kernel/vmlinux.lds.S @@ -41,6 +41,9 @@ _jiffies = _jiffies_64; SECTIONS { . = CONFIG_BOOT_LOAD; + /* Neither the text, ro_data or bss section need to be aligned + * So pack them back to back + */ .text : { __text = .; @@ -58,22 +61,25 @@ SECTIONS *(__ex_table) ___stop___ex_table = .; - . = ALIGN(4); __etext = .; } - RO_DATA(PAGE_SIZE) + /* Just in case the first read only is a 32-bit access */ + RO_DATA(4) + + .bss : + { + . = ALIGN(4); + ___bss_start = .; + *(.bss .bss.*) + *(COMMON) + ___bss_stop = .; + } .data : { - /* make sure the init_task is aligned to the - * kernel thread size so we can locate the kernel - * stack properly and quickly. - */ __sdata = .; - . = ALIGN(THREAD_SIZE); - *(.data.init_task) - + /* This gets done first, so the glob doesn't suck it in */ . = ALIGN(32); *(.data.cacheline_aligned) @@ -81,10 +87,22 @@ SECTIONS *(.data.*) CONSTRUCTORS + /* make sure the init_task is aligned to the + * kernel thread size so we can locate the kernel + * stack properly and quickly. + */ . = ALIGN(THREAD_SIZE); + *(.init_task.data) + __edata = .; } + /* The init section should be last, so when we free it, it goes into + * the general memory pool, and (hopefully) will decrease fragmentation + * a tiny bit. The init section has a _requirement_ that it be + * PAGE_SIZE aligned + */ + . = ALIGN(PAGE_SIZE); ___init_begin = .; .init.text : @@ -179,16 +197,7 @@ SECTIONS . = ALIGN(PAGE_SIZE); ___init_end = .; - .bss : - { - . = ALIGN(4); - ___bss_start = .; - *(.bss .bss.*) - *(COMMON) - . = ALIGN(4); - ___bss_stop = .; - __end = .; - } + __end =.; STABS_DEBUG |