Commit 86a66810 authored Jul 13, 2018 by Dan Williams Committed by Dave Jiang Jul 20, 2018

mm, madvise_inject_error: Disable MADV_SOFT_OFFLINE for ZONE_DEVICE pages



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>
Acked-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>

parent 73449daf

mm/memory-failure.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -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)