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From: Dan Williams <dan.j.williams@intel.com>
To: linux-nvdimm@lists.01.org
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
	hch@lst.de, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH v6 05/13] mm, madvise_inject_error: Disable MADV_SOFT_OFFLINE for ZONE_DEVICE pages
Date: Fri, 13 Jul 2018 21:49:56 -0700	[thread overview]
Message-ID: <153154379606.34503.17311881160518829077.stgit@dwillia2-desk3.amr.corp.intel.com> (raw)
In-Reply-To: <153154376846.34503.15480221419473501643.stgit@dwillia2-desk3.amr.corp.intel.com>

Given that dax / device-mapped pages are never subject to page
allocations remove them from consideration by the soft-offline
mechanism.

Reported-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
 mm/memory-failure.c |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 9d142b9b86dc..988f977db3d2 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1751,6 +1751,14 @@ int soft_offline_page(struct page *page, int flags)
 	int ret;
 	unsigned long pfn = page_to_pfn(page);
 
+	if (is_zone_device_page(page)) {
+		pr_debug_ratelimited("soft_offline: %#lx page is device page\n",
+				pfn);
+		if (flags & MF_COUNT_INCREASED)
+			put_page(page);
+		return -EIO;
+	}
+
 	if (PageHWPoison(page)) {
 		pr_info("soft offline: %#lx page already poisoned\n", pfn);
 		if (flags & MF_COUNT_INCREASED)


  parent reply	other threads:[~2018-07-14  4:59 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-14  4:49 [PATCH v6 00/13] mm: Teach memory_failure() about ZONE_DEVICE pages Dan Williams
2018-07-14  4:49 ` [PATCH v6 01/13] device-dax: Convert to vmf_insert_mixed and vm_fault_t Dan Williams
2018-07-14  4:49 ` [PATCH v6 02/13] device-dax: Enable page_mapping() Dan Williams
2018-07-14  4:49 ` [PATCH v6 03/13] device-dax: Set page->index Dan Williams
2018-07-14  4:49 ` [PATCH v6 04/13] filesystem-dax: " Dan Williams
2018-07-14  4:49 ` Dan Williams [this message]
2018-07-17  6:47   ` [PATCH v6 05/13] mm, madvise_inject_error: Disable MADV_SOFT_OFFLINE for ZONE_DEVICE pages Naoya Horiguchi
2018-07-14  4:50 ` [PATCH v6 06/13] mm, dev_pagemap: Do not clear ->mapping on final put Dan Williams
2018-07-23 16:12   ` Dave Jiang
2018-07-23 16:23     ` Jerome Glisse
2018-07-14  4:50 ` [PATCH v6 07/13] mm, madvise_inject_error: Let memory_failure() optionally take a page reference Dan Williams
2018-07-17  6:52   ` Naoya Horiguchi
2018-07-14  4:50 ` [PATCH v6 08/13] mm, memory_failure: Collect mapping size in collect_procs() Dan Williams
2018-07-14  4:50 ` [PATCH v6 09/13] filesystem-dax: Introduce dax_lock_mapping_entry() Dan Williams
2018-08-06  9:21   ` Jan Kara
2018-07-14  4:50 ` [PATCH v6 10/13] mm, memory_failure: Teach memory_failure() about dev_pagemap pages Dan Williams
2018-08-06  9:27   ` Jan Kara
2018-07-14  4:50 ` [PATCH v6 11/13] x86/mm/pat: Prepare {reserve, free}_memtype() for "decoy" addresses Dan Williams
2018-07-24  7:36   ` Ingo Molnar
2018-07-24 15:46     ` Dave Jiang
2018-07-14  4:50 ` [PATCH v6 12/13] x86/memory_failure: Introduce {set, clear}_mce_nospec() Dan Williams
2018-07-14  4:50 ` [PATCH v6 13/13] libnvdimm, pmem: Restore page attributes when clearing errors Dan Williams
2018-07-19 17:57 ` [PATCH v6 00/13] mm: Teach memory_failure() about ZONE_DEVICE pages Dave Jiang
2018-07-24  7:39   ` Ingo Molnar

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