Add a boot option called "mirrorable" to allocate mirrored memory at boot time
(after bootmem free).
Signed-off-by: Xishi Qiu <qiuxi...@huawei.com>
---
mm/page_alloc.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 63b90ca..d4d2066 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -213,6 +213,13 @@ int user_min_free_kbytes = -1;
#ifdef CONFIG_MEMORY_MIRROR
struct mirror_info mirror_info;
int sysctl_mirrorable = 0;
+
+static int __init set_mirrorable(char *p)
+{
+ sysctl_mirrorable = 1;
+ return 0;
+}
+early_param("mirrorable", set_mirrorable);
#endif
static unsigned long __meminitdata nr_kernel_pages;
--
2.0.0
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