From 7c116f2b0dbac4a1dd051c7a5e8cef37701cafd4 Mon Sep 17 00:00:00 2001 From: Wu Fengguang Date: Wed, 16 Dec 2009 12:19:59 +0100 Subject: HWPOISON: add fs/device filters Filesystem data/metadata present the most tricky-to-isolate pages. It requires careful code review and stress testing to get them right. The fs/device filter helps to target the stress tests to some specific filesystem pages. The filter condition is block device's major/minor numbers: - corrupt-filter-dev-major - corrupt-filter-dev-minor When specified (non -1), only page cache pages that belong to that device will be poisoned. The filters are checked reliably on the locked and refcounted page. Haicheng: clear PG_hwpoison and drop bad page count if filter not OK AK: Add documentation CC: Haicheng Li CC: Nick Piggin Signed-off-by: Wu Fengguang Signed-off-by: Andi Kleen --- Documentation/vm/hwpoison.txt | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'Documentation/vm') diff --git a/Documentation/vm/hwpoison.txt b/Documentation/vm/hwpoison.txt index f047e75acb2..fdf58046432 100644 --- a/Documentation/vm/hwpoison.txt +++ b/Documentation/vm/hwpoison.txt @@ -115,6 +115,13 @@ memory failures. Note these injection interfaces are not stable and might change between kernel versions +corrupt-filter-dev-major +corrupt-filter-dev-minor + +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. + Architecture specific MCE injector x86 has mce-inject, mce-test -- cgit v1.2.3