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mm, madvise_inject_error: Disable MADV_SOFT_OFFLINE for ZONE_DEVICE pages

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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>
This commit is contained in:
Dan Williams 2018-07-13 21:49:56 -07:00 committed by Dave Jiang
parent 73449daf8f
commit 86a66810ba
1 changed files with 8 additions and 0 deletions
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8
mm/memory-failure.c
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@ -1751,6 +1751,14 @@ int soft_offline_page(struct page *page, int flags)
int ret; int ret;
unsigned long pfn = page_to_pfn(page); 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)) { if (PageHWPoison(page)) {
pr_info("soft offline: %#lx page already poisoned\n", pfn); pr_info("soft offline: %#lx page already poisoned\n", pfn);
if (flags & MF_COUNT_INCREASED) if (flags & MF_COUNT_INCREASED)