root/include/linux/migrate_mode.h

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INCLUDED FROM

#ifndef MIGRATE_MODE_H_INCLUDED
#define MIGRATE_MODE_H_INCLUDED
/*
 * MIGRATE_ASYNC means never block
 * MIGRATE_SYNC_LIGHT in the current implementation means to allow blocking
 *      on most operations but not ->writepage as the potential stall time
 *      is too significant
 * MIGRATE_SYNC will block when migrating pages
 */
enum migrate_mode {
        MIGRATE_ASYNC,
        MIGRATE_SYNC_LIGHT,
        MIGRATE_SYNC,
};

#endif          /* MIGRATE_MODE_H_INCLUDED */
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