Commit c313dc5d authored Dec 12, 2014 by Weijie Yang Committed by Linus Torvalds Dec 13, 2014

mm: mincore: add hwpoison page handle



When the encountered pte is a swap entry, the current code handles two
cases: migration and normal swapentry, but we have a third case: hwpoison
page.

This patch adds hwpoison page handle, consider hwpoison page incore as
same as migration.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Weijie Yang <weijie.yang@samsung.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Mel Gorman <mgorman@suse.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Rik van Riel <riel@redhat.com>
Acked-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent b258d860

mm/mincore.c

+5 −2

Original line number	Diff line number	Diff line
		@@ -137,8 +137,11 @@ static void mincore_pte_range(struct vm_area_struct vma, pmd_t pmd,
		} else { /* pte is a swap entry */
		swp_entry_t entry = pte_to_swp_entry(pte);

		if (is_migration_entry(entry)) {
		/* migration entries are always uptodate */
		if (non_swap_entry(entry)) {
		/*
		* migration or hwpoison entries are always
		* uptodate
		*/
		*vec = 1;
		} else {
		#ifdef CONFIG_SWAP

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