lkml.org 
[lkml]   [2015]   [Jun]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[RFC PATCH 08/12] mm: use mirrorable to switch allocate mirrored memory
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 <qiuxishi@huawei.com>
---
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



\
 
 \ /
  Last update: 2015-06-04 15:21    [W:0.338 / U:0.120 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site