---

yaml
---
r: 177629
b: refs/heads/master
c: 478c5ff
h: refs/heads/master
i:
  177627: 76fef14
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 1a9b5b7fe0c5dad8a635288882d36785dea742f9
+refs/heads/master: 478c5ffc0b50527bd2390f2daa46cc16276b8413

trunk/Documentation/vm/hwpoison.txt

@@ -123,6 +123,16 @@ Only handle memory failures to pages associated with the file system defined
 by block device major/minor.  -1U is the wildcard value.
 This should be only used for testing with artificial injection.
 
+
+corrupt-filter-flags-mask
+corrupt-filter-flags-value
+
+When specified, only poison pages if ((page_flags & mask) == value).
+This allows stress testing of many kinds of pages. The page_flags
+are the same as in /proc/kpageflags. The flag bits are defined in
+include/linux/kernel-page-flags.h and documented in
+Documentation/vm/pagemap.txt
+
 Architecture specific MCE injector
 
 x86 has mce-inject, mce-test

trunk/mm/Kconfig

@@ -253,6 +253,7 @@ config MEMORY_FAILURE
 config HWPOISON_INJECT
 	tristate "Poison pages injector"
 	depends on MEMORY_FAILURE && DEBUG_KERNEL
+	select PROC_PAGE_MONITOR
 
 config NOMMU_INITIAL_TRIM_EXCESS
 	int "Turn on mmap() excess space trimming before booting"

trunk/mm/hwpoison-inject.c

@@ -102,6 +102,16 @@ static int pfn_inject_init(void)
 	if (!dentry)
 		goto fail;
 
+	dentry = debugfs_create_u64("corrupt-filter-flags-mask", 0600,
+				    hwpoison_dir, &hwpoison_filter_flags_mask);
+	if (!dentry)
+		goto fail;
+
+	dentry = debugfs_create_u64("corrupt-filter-flags-value", 0600,
+				    hwpoison_dir, &hwpoison_filter_flags_value);
+	if (!dentry)
+		goto fail;
+
 	return 0;
 fail:
 	pfn_inject_exit();

trunk/mm/internal.h

@@ -255,3 +255,5 @@ extern int hwpoison_filter(struct page *p);
 
 extern u32 hwpoison_filter_dev_major;
 extern u32 hwpoison_filter_dev_minor;
+extern u64 hwpoison_filter_flags_mask;
+extern u64 hwpoison_filter_flags_value;

trunk/mm/memory-failure.c

@@ -34,6 +34,7 @@
 #include <linux/kernel.h>
 #include <linux/mm.h>
 #include <linux/page-flags.h>
+#include <linux/kernel-page-flags.h>
 #include <linux/sched.h>
 #include <linux/ksm.h>
 #include <linux/rmap.h>
@@ -50,8 +51,12 @@ atomic_long_t mce_bad_pages __read_mostly = ATOMIC_LONG_INIT(0);
 
 u32 hwpoison_filter_dev_major = ~0U;
 u32 hwpoison_filter_dev_minor = ~0U;
+u64 hwpoison_filter_flags_mask;
+u64 hwpoison_filter_flags_value;
 EXPORT_SYMBOL_GPL(hwpoison_filter_dev_major);
 EXPORT_SYMBOL_GPL(hwpoison_filter_dev_minor);
+EXPORT_SYMBOL_GPL(hwpoison_filter_flags_mask);
+EXPORT_SYMBOL_GPL(hwpoison_filter_flags_value);
 
 static int hwpoison_filter_dev(struct page *p)
 {
@@ -83,11 +88,26 @@ static int hwpoison_filter_dev(struct page *p)
 	return 0;
 }
 
+static int hwpoison_filter_flags(struct page *p)
+{
+	if (!hwpoison_filter_flags_mask)
+		return 0;
+
+	if ((stable_page_flags(p) & hwpoison_filter_flags_mask) ==
+				    hwpoison_filter_flags_value)
+		return 0;
+	else
+		return -EINVAL;
+}
+
 int hwpoison_filter(struct page *p)
 {
 	if (hwpoison_filter_dev(p))
 		return -EINVAL;
 
+	if (hwpoison_filter_flags(p))
+		return -EINVAL;
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(hwpoison_filter);