From dbe67df4ba78c79db547c7864e1120981c144c97 Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Wed, 3 Jul 2013 15:02:51 -0700 Subject: mm: enhance free_reserved_area() to support poisoning memory with zero Address more review comments from last round of code review. 1) Enhance free_reserved_area() to support poisoning freed memory with pattern '0'. This could be used to get rid of poison_init_mem() on ARM64. 2) A previous patch has disabled memory poison for initmem on s390 by mistake, so restore to the original behavior. 3) Remove redundant PAGE_ALIGN() when calling free_reserved_area(). Signed-off-by: Jiang Liu Cc: Geert Uytterhoeven Cc: "H. Peter Anvin" Cc: "Michael S. Tsirkin" Cc: Cc: Arnd Bergmann Cc: Catalin Marinas Cc: Chris Metcalf Cc: David Howells Cc: Ingo Molnar Cc: Jeremy Fitzhardinge Cc: Jianguo Wu Cc: Joonsoo Kim Cc: Kamezawa Hiroyuki Cc: Konrad Rzeszutek Wilk Cc: Marek Szyprowski Cc: Mel Gorman Cc: Michel Lespinasse Cc: Minchan Kim Cc: Rik van Riel Cc: Rusty Russell Cc: Tang Chen Cc: Tejun Heo Cc: Thomas Gleixner Cc: Wen Congyang Cc: Will Deacon Cc: Yasuaki Ishimatsu Cc: Yinghai Lu Cc: Russell King Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/cris/mm/init.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/cris') diff --git a/arch/cris/mm/init.c b/arch/cris/mm/init.c index 9ac80946dada..8fec26392ae7 100644 --- a/arch/cris/mm/init.c +++ b/arch/cris/mm/init.c @@ -65,5 +65,5 @@ mem_init(void) void free_initmem(void) { - free_initmem_default(0); + free_initmem_default(-1); } -- cgit v1.2.2 From 0c988534737a358fdff42fcce78f0ff1a12dbfc5 Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Wed, 3 Jul 2013 15:03:24 -0700 Subject: mm: concentrate modification of totalram_pages into the mm core Concentrate code to modify totalram_pages into the mm core, so the arch memory initialized code doesn't need to take care of it. With these changes applied, only following functions from mm core modify global variable totalram_pages: free_bootmem_late(), free_all_bootmem(), free_all_bootmem_node(), adjust_managed_page_count(). With this patch applied, it will be much more easier for us to keep totalram_pages and zone->managed_pages in consistence. Signed-off-by: Jiang Liu Acked-by: David Howells Cc: "H. Peter Anvin" Cc: "Michael S. Tsirkin" Cc: Cc: Arnd Bergmann Cc: Catalin Marinas Cc: Chris Metcalf Cc: Geert Uytterhoeven Cc: Ingo Molnar Cc: Jeremy Fitzhardinge Cc: Jianguo Wu Cc: Joonsoo Kim Cc: Kamezawa Hiroyuki Cc: Konrad Rzeszutek Wilk Cc: Marek Szyprowski Cc: Mel Gorman Cc: Michel Lespinasse Cc: Minchan Kim Cc: Rik van Riel Cc: Rusty Russell Cc: Tang Chen Cc: Tejun Heo Cc: Thomas Gleixner Cc: Wen Congyang Cc: Will Deacon Cc: Yasuaki Ishimatsu Cc: Yinghai Lu Cc: Russell King Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/cris/mm/init.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/cris') diff --git a/arch/cris/mm/init.c b/arch/cris/mm/init.c index 8fec26392ae7..52b8b56ae305 100644 --- a/arch/cris/mm/init.c +++ b/arch/cris/mm/init.c @@ -33,7 +33,7 @@ mem_init(void) max_mapnr = num_physpages = max_low_pfn - min_low_pfn; /* this will put all memory onto the freelists */ - totalram_pages = free_all_bootmem(); + free_all_bootmem(); reservedpages = 0; for (tmp = 0; tmp < max_mapnr; tmp++) { -- cgit v1.2.2 From 4e422de996da62e933dcc0fd3c2d7fe513cf32a2 Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Wed, 3 Jul 2013 15:03:54 -0700 Subject: mm/cris: prepare for removing num_physpages and simplify mem_init() Prepare for removing num_physpages and simplify mem_init(). Signed-off-by: Jiang Liu Acked-by: Jesper Nilsson Cc: Mikael Starvik Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/cris/mm/init.c | 33 ++------------------------------- 1 file changed, 2 insertions(+), 31 deletions(-) (limited to 'arch/cris') diff --git a/arch/cris/mm/init.c b/arch/cris/mm/init.c index 52b8b56ae305..c81af5bd9167 100644 --- a/arch/cris/mm/init.c +++ b/arch/cris/mm/init.c @@ -19,9 +19,6 @@ unsigned long empty_zero_page; void __init mem_init(void) { - int codesize, reservedpages, datasize, initsize; - unsigned long tmp; - BUG_ON(!mem_map); /* max/min_low_pfn was set by setup.c @@ -29,35 +26,9 @@ mem_init(void) * * high_memory was also set in setup.c */ - - max_mapnr = num_physpages = max_low_pfn - min_low_pfn; - - /* this will put all memory onto the freelists */ + max_mapnr = max_low_pfn - min_low_pfn; free_all_bootmem(); - - reservedpages = 0; - for (tmp = 0; tmp < max_mapnr; tmp++) { - /* - * Only count reserved RAM pages - */ - if (PageReserved(mem_map + tmp)) - reservedpages++; - } - - codesize = (unsigned long) &_etext - (unsigned long) &_stext; - datasize = (unsigned long) &_edata - (unsigned long) &_etext; - initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin; - - printk(KERN_INFO - "Memory: %luk/%luk available (%dk kernel code, %dk reserved, %dk data, " - "%dk init)\n" , - nr_free_pages() << (PAGE_SHIFT-10), - max_mapnr << (PAGE_SHIFT-10), - codesize >> 10, - reservedpages << (PAGE_SHIFT-10), - datasize >> 10, - initsize >> 10 - ); + mem_init_print_info(NULL); } /* free the pages occupied by initialization code */ -- cgit v1.2.2 From 35fa075f3ea432878ef50c0206df82f003a72222 Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Wed, 3 Jul 2013 15:04:41 -0700 Subject: mm/CRIS: clean up unused VALID_PAGE() VALID_PAGE() has been removed from kernel long time ago, so clean up it. Signed-off-by: Jiang Liu Acked-by: Jesper Nilsson Cc: Mikael Starvik Cc: Jiang Liu Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/cris/include/asm/page.h | 1 - 1 file changed, 1 deletion(-) (limited to 'arch/cris') diff --git a/arch/cris/include/asm/page.h b/arch/cris/include/asm/page.h index be45ee366be9..dfc53f9b88ec 100644 --- a/arch/cris/include/asm/page.h +++ b/arch/cris/include/asm/page.h @@ -51,7 +51,6 @@ typedef struct page *pgtable_t; */ #define virt_to_page(kaddr) (mem_map + (((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT)) -#define VALID_PAGE(page) (((page) - mem_map) < max_mapnr) #define virt_addr_valid(kaddr) pfn_valid((unsigned)(kaddr) >> PAGE_SHIFT) /* convert a page (based on mem_map and forward) to a physical address -- cgit v1.2.2