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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
6536e312 AM |
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 | |
2916ecc0 JG |
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. | |
6536e312 AM |
14 | */ |
15 | enum migrate_mode { | |
16 | MIGRATE_ASYNC, | |
17 | MIGRATE_SYNC_LIGHT, | |
18 | MIGRATE_SYNC, | |
2916ecc0 | 19 | MIGRATE_SYNC_NO_COPY, |
6536e312 AM |
20 | }; |
21 | ||
8eb42bea JH |
22 | enum migrate_reason { |
23 | MR_COMPACTION, | |
24 | MR_MEMORY_FAILURE, | |
25 | MR_MEMORY_HOTPLUG, | |
26 | MR_SYSCALL, /* also applies to cpusets */ | |
27 | MR_MEMPOLICY_MBIND, | |
28 | MR_NUMA_MISPLACED, | |
29 | MR_CONTIG_RANGE, | |
30 | MR_LONGTERM_PIN, | |
31 | MR_DEMOTION, | |
32 | MR_TYPES | |
33 | }; | |
34 | ||
6536e312 | 35 | #endif /* MIGRATE_MODE_H_INCLUDED */ |