Documentation/vm/hwpoison.rst

11 (``MCA recovery``). This requires the OS to declare a page "poisoned",
43 The code consists of a the high level handler in mm/memory-failure.c,
48 of applications. KVM support requires a recent qemu-kvm release.
56 Failure recovery modes
59 There are two (actually three) modes memory failure recovery can be in:
62 	All memory failures cause a panic. Do not attempt recovery.
71 	This is the mode used by KVM qemu.
85 	Enable early kill mode globally
88 	Set early/late kill mode/revert to system default
93 		arg2 defines thread specific mode
108 	return current mode
113 * madvise(MADV_HWPOISON, ....) (as root) - Poison a page in the
116 * hwpoison-inject module through debugfs ``/sys/kernel/debug/hwpoison/``
118   corrupt-pfn
122   unpoison-pfn
123 	Software-unpoison page at PFN echoed into this file. This way
130   corrupt-filter-dev-major, corrupt-filter-dev-minor
132 	system defined by block device major/minor.  -1U is the
136   corrupt-filter-memcg
144 	        usemem -m 100 -s 1000 &
145 		echo `jobs -p` > /sys/fs/cgroup/mem/hwpoison/tasks
147 		memcg_ino=$(ls -id /sys/fs/cgroup/mem/hwpoison | cut -f1 -d' ')
148 		echo $memcg_ino > /debug/hwpoison/corrupt-filter-memcg
150 		page-types -p `pidof init`   --hwpoison  # shall do nothing
151 		page-types -p `pidof usemem` --hwpoison  # poison its pages
153   corrupt-filter-flags-mask, corrupt-filter-flags-value
157 	flag bits are defined in include/linux/kernel-page-flags.h and
158 	documented in Documentation/admin-guide/mm/pagemap.rst
162   x86 has mce-inject, mce-test
164   Some portable hwpoison test programs in mce-test, see below.
169 http://halobates.de/mce-lc09-2.pdf
172 git://git.kernel.org/pub/scm/utils/cpu/mce/mce-test.git
175 git://git.kernel.org/pub/scm/utils/cpu/mce/mce-inject.git
181 - Not all page types are supported and never will. Most kernel internal
183 - Right now hugepage support is missing.
185 ---