1 What: /sys/devices/system/memory/soft_offline_page
4 Contact: andi@firstfloor.org
6 Soft-offline the memory page containing the physical address
7 written into this file. Input is a hex number specifying the
8 physical address of the page. The kernel will then attempt
9 to soft-offline it, by moving the contents elsewhere or
10 dropping it if possible. The kernel will then be placed
11 on the bad page list and never be reused.
13 The offlining is done in kernel specific granuality.
14 Normally it's the base page size of the kernel, but
17 The page must be still accessible, not poisoned. The
18 kernel will never kill anything for this, but rather
19 fail the offline. Return value is the size of the
20 number, or a error when the offlining failed. Reading
21 the file is not allowed.
23 What: /sys/devices/system/memory/hard_offline_page
26 Contact: andi@firstfloor.org
28 Hard-offline the memory page containing the physical
29 address written into this file. Input is a hex number
30 specifying the physical address of the page. The
31 kernel will then attempt to hard-offline the page, by
32 trying to drop the page or killing any owner or
33 triggering IO errors if needed. Note this may kill
34 any processes owning the page. The kernel will avoid
35 to access this page assuming it's poisoned by the
38 The offlining is done in kernel specific granuality.
39 Normally it's the base page size of the kernel, but
42 Return value is the size of the number, or a error when
44 Reading the file is not allowed.