diff options
Diffstat (limited to 'mm/madvise.c')
| -rw-r--r-- | mm/madvise.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/mm/madvise.c b/mm/madvise.c index 35b1479..319528b 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -9,6 +9,7 @@ #include <linux/pagemap.h> #include <linux/syscalls.h> #include <linux/mempolicy.h> +#include <linux/page-isolation.h> #include <linux/hugetlb.h> #include <linux/sched.h> #include <linux/ksm.h> @@ -222,7 +223,7 @@ static long madvise_remove(struct vm_area_struct *vma, /* * Error injection support for memory error handling. */ -static int madvise_hwpoison(unsigned long start, unsigned long end) +static int madvise_hwpoison(int bhv, unsigned long start, unsigned long end) { int ret = 0; @@ -230,15 +231,21 @@ static int madvise_hwpoison(unsigned long start, unsigned long end) return -EPERM; for (; start < end; start += PAGE_SIZE) { struct page *p; - int ret = get_user_pages(current, current->mm, start, 1, - 0, 0, &p, NULL); + int ret = get_user_pages_fast(start, 1, 0, &p); if (ret != 1) return ret; + if (bhv == MADV_SOFT_OFFLINE) { + printk(KERN_INFO "Soft offlining page %lx at %lx\n", + page_to_pfn(p), start); + ret = soft_offline_page(p, MF_COUNT_INCREASED); + if (ret) + break; + continue; + } printk(KERN_INFO "Injecting memory failure for page %lx at %lx\n", page_to_pfn(p), start); /* Ignore return value for now */ - __memory_failure(page_to_pfn(p), 0, 1); - put_page(p); + __memory_failure(page_to_pfn(p), 0, MF_COUNT_INCREASED); } return ret; } @@ -335,8 +342,8 @@ SYSCALL_DEFINE3(madvise, unsigned long, start, size_t, len_in, int, behavior) size_t len; #ifdef CONFIG_MEMORY_FAILURE - if (behavior == MADV_HWPOISON) - return madvise_hwpoison(start, start+len_in); + if (behavior == MADV_HWPOISON || behavior == MADV_SOFT_OFFLINE) + return madvise_hwpoison(behavior, start, start+len_in); #endif if (!madvise_behavior_valid(behavior)) return error; |