From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ie0-f172.google.com (mail-ie0-f172.google.com [209.85.223.172]) by kanga.kvack.org (Postfix) with ESMTP id 86B4E900016 for ; Thu, 4 Jun 2015 09:12:38 -0400 (EDT) Received: by iebmu5 with SMTP id mu5so628537ieb.1 for ; Thu, 04 Jun 2015 06:12:38 -0700 (PDT) Received: from szxga01-in.huawei.com (szxga01-in.huawei.com. [58.251.152.64]) by mx.google.com with ESMTPS id o19si3609933igs.5.2015.06.04.06.12.36 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Thu, 04 Jun 2015 06:12:38 -0700 (PDT) Message-ID: <55704C79.5060608@huawei.com> Date: Thu, 4 Jun 2015 21:02:49 +0800 From: Xishi Qiu MIME-Version: 1.0 Subject: [RFC PATCH 08/12] mm: use mirrorable to switch allocate mirrored memory References: <55704A7E.5030507@huawei.com> In-Reply-To: <55704A7E.5030507@huawei.com> Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Xishi Qiu , Andrew Morton , nao.horiguchi@gmail.com, Yinghai Lu , "H. Peter Anvin" , Thomas Gleixner , mingo@elte.hu, Xiexiuqi , Hanjun Guo , "Luck, Tony" Cc: Linux MM , LKML Add a new interface in path /proc/sys/vm/mirrorable. When set to 1, it means we should allocate mirrored memory for both user and kernel processes. Signed-off-by: Xishi Qiu --- include/linux/mmzone.h | 1 + kernel/sysctl.c | 9 +++++++++ mm/page_alloc.c | 1 + 3 files changed, 11 insertions(+) diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index f82e3ae..20888dd 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -85,6 +85,7 @@ struct mirror_info { }; extern struct mirror_info mirror_info; +extern int sysctl_mirrorable; # define is_migrate_mirror(migratetype) unlikely((migratetype) == MIGRATE_MIRROR) #else # define is_migrate_mirror(migratetype) false diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 2082b1a..dc2625e 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -1514,6 +1514,15 @@ static struct ctl_table vm_table[] = { .extra2 = &one, }, #endif +#ifdef CONFIG_MEMORY_MIRROR + { + .procname = "mirrorable", + .data = &sysctl_mirrorable, + .maxlen = sizeof(sysctl_mirrorable), + .mode = 0644, + .proc_handler = proc_dointvec_minmax, + }, +#endif { .procname = "user_reserve_kbytes", .data = &sysctl_user_reserve_kbytes, diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 249a8f6..63b90ca 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -212,6 +212,7 @@ int user_min_free_kbytes = -1; #ifdef CONFIG_MEMORY_MIRROR struct mirror_info mirror_info; +int sysctl_mirrorable = 0; #endif static unsigned long __meminitdata nr_kernel_pages; -- 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