diff options
Diffstat (limited to 'mm/hwpoison-inject.c')
| -rw-r--r-- | mm/hwpoison-inject.c | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/mm/hwpoison-inject.c b/mm/hwpoison-inject.c index 0948f1072d6..95487c71cad 100644 --- a/mm/hwpoison-inject.c +++ b/mm/hwpoison-inject.c @@ -1,4 +1,4 @@ -/* Inject a hwpoison memory failure on a arbitary pfn */ +/* Inject a hwpoison memory failure on a arbitrary pfn */ #include <linux/module.h> #include <linux/debugfs.h> #include <linux/kernel.h> @@ -20,8 +20,6 @@ static int hwpoison_inject(void *data, u64 val) if (!capable(CAP_SYS_ADMIN)) return -EPERM; - if (!hwpoison_filter_enable) - goto inject; if (!pfn_valid(pfn)) return -ENXIO; @@ -33,6 +31,9 @@ static int hwpoison_inject(void *data, u64 val) if (!get_page_unless_zero(hpage)) return 0; + if (!hwpoison_filter_enable) + goto inject; + if (!PageLRU(p) && !PageHuge(p)) shake_page(p, 0); /* @@ -45,7 +46,7 @@ static int hwpoison_inject(void *data, u64 val) * do a racy check with elevated page count, to make sure PG_hwpoison * will only be set for the targeted owner (or on a free page). * We temporarily take page lock for try_get_mem_cgroup_from_page(). - * __memory_failure() will redo the check reliably inside page lock. + * memory_failure() will redo the check reliably inside page lock. */ lock_page(hpage); err = hwpoison_filter(hpage); @@ -54,8 +55,8 @@ static int hwpoison_inject(void *data, u64 val) return 0; inject: - printk(KERN_INFO "Injecting memory failure at pfn %lx\n", pfn); - return __memory_failure(pfn, 18, MF_COUNT_INCREASED); + pr_info("Injecting memory failure at pfn %#lx\n", pfn); + return memory_failure(pfn, 18, MF_COUNT_INCREASED); } static int hwpoison_unpoison(void *data, u64 val) @@ -88,12 +89,12 @@ static int pfn_inject_init(void) * hardware status change, hence do not require hardware support. * They are mainly for testing hwpoison in software level. */ - dentry = debugfs_create_file("corrupt-pfn", 0600, hwpoison_dir, + dentry = debugfs_create_file("corrupt-pfn", 0200, hwpoison_dir, NULL, &hwpoison_fops); if (!dentry) goto fail; - dentry = debugfs_create_file("unpoison-pfn", 0600, hwpoison_dir, + dentry = debugfs_create_file("unpoison-pfn", 0200, hwpoison_dir, NULL, &unpoison_fops); if (!dentry) goto fail; @@ -123,7 +124,7 @@ static int pfn_inject_init(void) if (!dentry) goto fail; -#ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP +#ifdef CONFIG_MEMCG_SWAP dentry = debugfs_create_u64("corrupt-filter-memcg", 0600, hwpoison_dir, &hwpoison_filter_memcg); if (!dentry) |