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-rw-r--r--include/migration/postcopy-ram.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/migration/postcopy-ram.h b/include/migration/postcopy-ram.h
index d7c292f..b6a7491f 100644
--- a/include/migration/postcopy-ram.h
+++ b/include/migration/postcopy-ram.h
@@ -41,6 +41,12 @@ int postcopy_ram_incoming_cleanup(MigrationIncomingState *mis);
int postcopy_ram_discard_range(MigrationIncomingState *mis, uint8_t *start,
size_t length);
+/*
+ * Userfault requires us to mark RAM as NOHUGEPAGE prior to discard
+ * however leaving it until after precopy means that most of the precopy
+ * data is still THPd
+ */
+int postcopy_ram_prepare_discard(MigrationIncomingState *mis);
/*
* Called at the start of each RAMBlock by the bitmap code.