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authorPaul Mundt <lethal@linux-sh.org>2012-02-24 13:23:23 +0900
committerPaul Mundt <lethal@linux-sh.org>2012-02-24 13:23:23 +0900
commit35eb304b5cd7b49d581bda79218b8134f3b689ea (patch)
tree3d75d9ada70814161d035b2f9166fee05d257dfb /include/linux/migrate_mode.h
parentca0cc30109241f280eb871794620d7cf198bb582 (diff)
parentbb4c7e9a9908548b458f34afb2fee74dc0d49f90 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into rmobile-fixes-for-linus
Diffstat (limited to 'include/linux/migrate_mode.h')
-rw-r--r--include/linux/migrate_mode.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/migrate_mode.h b/include/linux/migrate_mode.h
new file mode 100644
index 000000000000..ebf3d89a3919
--- /dev/null
+++ b/include/linux/migrate_mode.h
@@ -0,0 +1,16 @@
+#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 */