Hi Sam, Thanks for review! On 03/06/2013 03:58 AM, Sam Ravnborg wrote: > On Tue, Mar 05, 2013 at 10:55:05PM +0800, Jiang Liu wrote: >> Use common help functions to free reserved pages. > > I like how this simplify things! > > Please consider how you can also cover the HIGHMEM case, > so map_high_region(...) is simplified too (in init_32.c). > >> >> Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxx> >> Cc: "David S. Miller" <davem@xxxxxxxxxxxxx> >> Cc: Sam Ravnborg <sam@xxxxxxxxxxxx> >> --- >> arch/sparc/kernel/leon_smp.c | 15 +++------------ >> arch/sparc/mm/init_32.c | 40 ++++++---------------------------------- >> arch/sparc/mm/init_64.c | 25 ++++--------------------- >> 3 files changed, 13 insertions(+), 67 deletions(-) >> >> diff --git a/arch/sparc/mm/init_32.c b/arch/sparc/mm/init_32.c >> index 48e0c03..2a7b6eb 100644 >> --- a/arch/sparc/mm/init_32.c >> +++ b/arch/sparc/mm/init_32.c >> @@ -374,45 +374,17 @@ void __init mem_init(void) >> >> void free_initmem (void) >> { >> - unsigned long addr; >> - unsigned long freed; >> - >> - addr = (unsigned long)(&__init_begin); >> - freed = (unsigned long)(&__init_end) - addr; >> - for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) { >> - struct page *p; >> - >> - memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE); >> - p = virt_to_page(addr); >> - >> - ClearPageReserved(p); >> - init_page_count(p); >> - __free_page(p); >> - totalram_pages++; >> - num_physpages++; >> - } >> - printk(KERN_INFO "Freeing unused kernel memory: %ldk freed\n", >> - freed >> 10); >> + num_physpages += free_reserved_area((unsigned long)(&__init_begin), >> + (unsigned long)(&__init_end), >> + POISON_FREE_INITMEM, >> + "unused kernel"); > If you change free_initmem_default(...) to return number of pages freed this > could have been used here. Good suggestion, will make that change. > >> } >> >> #ifdef CONFIG_BLK_DEV_INITRD >> void free_initrd_mem(unsigned long start, unsigned long end) >> { >> - if (start < end) >> - printk(KERN_INFO "Freeing initrd memory: %ldk freed\n", >> - (end - start) >> 10); >> - for (; start < end; start += PAGE_SIZE) { >> - struct page *p; >> - >> - memset((void *)start, POISON_FREE_INITMEM, PAGE_SIZE); >> - p = virt_to_page(start); >> - >> - ClearPageReserved(p); >> - init_page_count(p); >> - __free_page(p); >> - totalram_pages++; >> - num_physpages++; >> - } >> + num_physpages += free_reserved_area(start, end, POISON_FREE_INITMEM, >> + "initrd"); >> } >> #endif >> >> diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c >> index 1588d33..03bfd10 100644 >> --- a/arch/sparc/mm/init_64.c >> +++ b/arch/sparc/mm/init_64.c >> @@ -2060,8 +2060,7 @@ void __init mem_init(void) >> /* We subtract one to account for the mem_map_zero page >> * allocated below. >> */ >> - totalram_pages -= 1; >> - num_physpages = totalram_pages; >> + num_physpages = totalram_pages - 1; >> >> /* >> * Set up the zero page, mark it reserved, so that page count >> @@ -2072,7 +2071,7 @@ void __init mem_init(void) >> prom_printf("paging_init: Cannot alloc zero page.\n"); >> prom_halt(); >> } >> - SetPageReserved(mem_map_zero); >> + mark_page_reserved(mem_map_zero); >> >> codepages = (((unsigned long) _etext) - ((unsigned long) _start)); >> codepages = PAGE_ALIGN(codepages) >> PAGE_SHIFT; >> @@ -2112,7 +2111,6 @@ void free_initmem(void) >> initend = (unsigned long)(__init_end) & PAGE_MASK; >> for (; addr < initend; addr += PAGE_SIZE) { >> unsigned long page; >> - struct page *p; >> >> page = (addr + >> ((unsigned long) __va(kern_base)) - >> @@ -2120,13 +2118,8 @@ void free_initmem(void) >> memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE); >> >> if (do_free) { >> - p = virt_to_page(page); >> - >> - ClearPageReserved(p); >> - init_page_count(p); >> - __free_page(p); >> + free_reserved_page(virt_to_page(page)); >> num_physpages++; >> - totalram_pages++; >> } >> } >> } >> @@ -2134,17 +2127,7 @@ void free_initmem(void) >> #ifdef CONFIG_BLK_DEV_INITRD >> void free_initrd_mem(unsigned long start, unsigned long end) >> { >> - if (start < end) >> - printk ("Freeing initrd memory: %ldk freed\n", (end - start) >> 10); >> - for (; start < end; start += PAGE_SIZE) { >> - struct page *p = virt_to_page(start); >> - >> - ClearPageReserved(p); >> - init_page_count(p); >> - __free_page(p); >> - num_physpages++; >> - totalram_pages++; >> - } >> + num_physpages += free_reserved_area(start, end, 0, "initrd"); > > Please add poison POISON_FREE_INITMEM here. I know this was not done before. Sure, will make it. > > Sam > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx"> email@xxxxxxxxx </a>