tree 7c5021386dedea0d12f8a05b00c5267c4d28e426
parent 8d22ba1b74aa9420b6032d856446564fb21f8090
author Wu Fengguang <fengguang.wu@intel.com> 1260962398 +0100
committer Andi Kleen <ak@linux.intel.com> 1260962398 +0100

HWPOISON: Add unpoisoning support

The unpoisoning interface is useful for stress testing tools to
reclaim poisoned pages (to prevent OOM)

There is no hardware level unpoisioning, so this
cannot be used for real memory errors, only for software injected errors.

Note that it may leak pages silently - those who have been removed from
LRU cache, but not isolated from page cache/swap cache at hwpoison time.
Especially the stress test of dirty swap cache pages shall reboot system
before exhausting memory.

AK: Fix comments, add documentation, add printks, rename symbol

Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>