Testing:
-madvise(MADV_POISON, ....)
+madvise(MADV_HWPOISON, ....)
(as root)
Poison a page in the process for testing
corrupt-pfn
-Inject hwpoison fault at PFN echoed into this file.
+Inject hwpoison fault at PFN echoed into this file. This does
+some early filtering to avoid corrupted unintended pages in test suites.
unpoison-pfn
by block device major/minor. -1U is the wildcard value.
This should be only used for testing with artificial injection.
+corrupt-filter-memcg
+
+Limit injection to pages owned by memgroup. Specified by inode number
+of the memcg.
+
+Example:
+ mkdir /cgroup/hwpoison
+
+ usemem -m 100 -s 1000 &
+ echo `jobs -p` > /cgroup/hwpoison/tasks
+
+ memcg_ino=$(ls -id /cgroup/hwpoison | cut -f1 -d' ')
+ echo $memcg_ino > /debug/hwpoison/corrupt-filter-memcg
+
+ page-types -p `pidof init` --hwpoison # shall do nothing
+ page-types -p `pidof usemem` --hwpoison # poison its pages
+
+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