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