1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef MIGRATE_MODE_H_INCLUDED
 3#define MIGRATE_MODE_H_INCLUDED
 4/*
 5 * MIGRATE_ASYNC means never block
 6 * MIGRATE_SYNC_LIGHT in the current implementation means to allow blocking
 7 *	on most operations but not ->writepage as the potential stall time
 8 *	is too significant
 9 * MIGRATE_SYNC will block when migrating pages
10 * MIGRATE_SYNC_NO_COPY will block when migrating pages but will not copy pages
11 *	with the CPU. Instead, page copy happens outside the migratepage()
12 *	callback and is likely using a DMA engine. See migrate_vma() and HMM
13 *	(mm/hmm.c) for users of this mode.
14 */
15enum migrate_mode {
16	MIGRATE_ASYNC,
17	MIGRATE_SYNC_LIGHT,
18	MIGRATE_SYNC,
19	MIGRATE_SYNC_NO_COPY,
20};
21
22#endif		/* MIGRATE_MODE_H_INCLUDED */

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef MIGRATE_MODE_H_INCLUDED
 3#define MIGRATE_MODE_H_INCLUDED
 4/*
 5 * MIGRATE_ASYNC means never block
 6 * MIGRATE_SYNC_LIGHT in the current implementation means to allow blocking
 7 *	on most operations but not ->writepage as the potential stall time
 8 *	is too significant
 9 * MIGRATE_SYNC will block when migrating pages
10 * MIGRATE_SYNC_NO_COPY will block when migrating pages but will not copy pages
11 *	with the CPU. Instead, page copy happens outside the migratepage()
12 *	callback and is likely using a DMA engine. See migrate_vma() and HMM
13 *	(mm/hmm.c) for users of this mode.
14 */
15enum migrate_mode {
16	MIGRATE_ASYNC,
17	MIGRATE_SYNC_LIGHT,
18	MIGRATE_SYNC,
19	MIGRATE_SYNC_NO_COPY,
20};
21
22#endif		/* MIGRATE_MODE_H_INCLUDED */