From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ie0-f171.google.com (mail-ie0-f171.google.com [209.85.223.171]) by kanga.kvack.org (Postfix) with ESMTP id E90CA6B0038 for ; Fri, 26 Jun 2015 22:32:21 -0400 (EDT) Received: by iecvh10 with SMTP id vh10so86484448iec.3 for ; Fri, 26 Jun 2015 19:32:21 -0700 (PDT) Received: from szxga01-in.huawei.com (szxga01-in.huawei.com. [58.251.152.64]) by mx.google.com with ESMTPS id q142si29283268ioe.75.2015.06.26.19.32.19 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Fri, 26 Jun 2015 19:32:21 -0700 (PDT) Message-ID: <558E0948.2010104@huawei.com> Date: Sat, 27 Jun 2015 10:24:08 +0800 From: Xishi Qiu MIME-Version: 1.0 Subject: [RFC v2 PATCH 2/8] mm: introduce MIGRATE_MIRROR to manage the mirrored pages References: <558E084A.60900@huawei.com> In-Reply-To: <558E084A.60900@huawei.com> Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton , "H. Peter Anvin" , Ingo Molnar , "Luck, Tony" , Hanjun Guo , Xiexiuqi , leon@leon.nu, Kamezawa Hiroyuki , Dave Hansen , Naoya Horiguchi , Vlastimil Babka , Mel Gorman Cc: Xishi Qiu , Linux MM , LKML This patch introduces a new migratetype called "MIGRATE_MIRROR", it is used to allocate mirrored pages. When cat /proc/pagetypeinfo, you can see the count of free mirrored blocks. Signed-off-by: Xishi Qiu --- include/linux/mmzone.h | 9 +++++++++ mm/page_alloc.c | 3 +++ mm/vmstat.c | 3 +++ 3 files changed, 15 insertions(+) diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 54d74f6..54e891a 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -39,6 +39,9 @@ enum { MIGRATE_UNMOVABLE, MIGRATE_RECLAIMABLE, MIGRATE_MOVABLE, +#ifdef CONFIG_MEMORY_MIRROR + MIGRATE_MIRROR, +#endif MIGRATE_PCPTYPES, /* the number of types on the pcp lists */ MIGRATE_RESERVE = MIGRATE_PCPTYPES, #ifdef CONFIG_CMA @@ -69,6 +72,12 @@ enum { # define is_migrate_cma(migratetype) false #endif +#ifdef CONFIG_MEMORY_MIRROR +# define is_migrate_mirror(migratetype) unlikely((migratetype) == MIGRATE_MIRROR) +#else +# define is_migrate_mirror(migratetype) false +#endif + #define for_each_migratetype_order(order, type) \ for (order = 0; order < MAX_ORDER; order++) \ for (type = 0; type < MIGRATE_TYPES; type++) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index ebffa0e..6e4d79f 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -3216,6 +3216,9 @@ static void show_migration_types(unsigned char type) [MIGRATE_UNMOVABLE] = 'U', [MIGRATE_RECLAIMABLE] = 'E', [MIGRATE_MOVABLE] = 'M', +#ifdef CONFIG_MEMORY_MIRROR + [MIGRATE_MIRROR] = 'O', +#endif [MIGRATE_RESERVE] = 'R', #ifdef CONFIG_CMA [MIGRATE_CMA] = 'C', diff --git a/mm/vmstat.c b/mm/vmstat.c index 4f5cd97..d0323e0 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -901,6 +901,9 @@ static char * const migratetype_names[MIGRATE_TYPES] = { "Unmovable", "Reclaimable", "Movable", +#ifdef CONFIG_MEMORY_MIRROR + "Mirror", +#endif "Reserve", #ifdef CONFIG_CMA "CMA", -- 2.0.0 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org