MM: straight mapping

Change-Id: I70871f8c382fb00aa719ed501cc5de436d916d7f

kernel/include/process.h

@@ -390,6 +390,7 @@ struct vm_range {
 	struct rb_node vm_rb_node;
 	unsigned long start, end;
 	unsigned long flag;
+	unsigned long straight_start;
 	struct memobj *memobj;
 	off_t objoff;
 	int pgshift;	/* page size. 0 means THP */
@@ -563,6 +564,9 @@ struct process {
 	int clone_count;
 	int thp_disable;
 
+	int straight_map;
+	size_t straight_map_threshold;
+
 	// perf_event
 	int perf_status;
 #define PP_NONE 0
@@ -578,6 +582,11 @@ struct process {
 #endif // PROFILE_ENABLE
 	int nr_processes; /* For partitioned execution */
 	int process_rank; /* Rank in partition */
+
+	void *straight_va;
+	size_t straight_len;
+	unsigned long straight_pa;
+
 	int coredump_barrier_count, coredump_barrier_count2;
 	mcs_rwlock_lock_t coredump_lock; // lock for coredump
 };

kernel/include/profile.h

@@ -40,6 +40,8 @@ enum profile_event_type {
 	PROFILE_remote_page_fault,
 	PROFILE_mpol_alloc_missed,
 	PROFILE_mmap_anon_contig_phys,
+	PROFILE_mmap_anon_straight,
+	PROFILE_mmap_anon_not_straight,
 	PROFILE_mmap_anon_no_contig_phys,
 	PROFILE_mmap_regular_file,
 	PROFILE_mmap_device_file,

kernel/include/syscall.h

@@ -217,6 +217,8 @@ struct program_load_desc {
 	int thp_disable;
 	int uti_thread_rank; /* N-th clone() spawns a thread on Linux CPU */
 	int uti_use_last_cpu; /* Work-around not to share CPU with OpenMP thread */
+	int straight_map;
+	size_t straight_map_threshold;
 	int nr_processes;
 	int process_rank;
 	__cpu_set_unit cpu_set[PLD_CPU_SET_SIZE];