+#include <linux/kthread.h>
+#include <libcfs/libcfs.h>
+#include <lustre_net.h>
+#include <lustre_lib.h>
+#include <lustre_ha.h>
+#include <obd_class.h> /* for obd_zombie */
+#include <obd_support.h> /* for OBD_FAIL_CHECK */
+#include <cl_object.h> /* cl_env_{get,put}() */
+#include <lprocfs_status.h>
+
+#include "ptlrpc_internal.h"
+
+/* One of these per CPT. */
+struct ptlrpcd {
+ int pd_size;
+ int pd_index;
+ int pd_cpt;
+ int pd_cursor;
+ int pd_nthreads;
+ int pd_groupsize;
+ struct ptlrpcd_ctl pd_threads[0];
+};
+
+/*
+ * max_ptlrpcds is obsolete, but retained to ensure that the kernel
+ * module will load on a system where it has been tuned.
+ * A value other than 0 implies it was tuned, in which case the value
+ * is used to derive a setting for ptlrpcd_per_cpt_max.
+ */
+static int max_ptlrpcds;
+module_param(max_ptlrpcds, int, 0644);
+MODULE_PARM_DESC(max_ptlrpcds,
+ "Max ptlrpcd thread count to be started (obsolete).");
+
+/*
+ * ptlrpcd_bind_policy is obsolete, but retained to ensure that
+ * the kernel module will load on a system where it has been tuned.
+ * A value other than 0 implies it was tuned, in which case the value
+ * is used to derive a setting for ptlrpcd_partner_group_size.
+ */
+static int ptlrpcd_bind_policy;
+module_param(ptlrpcd_bind_policy, int, 0644);
+MODULE_PARM_DESC(ptlrpcd_bind_policy,
+ "Ptlrpcd threads binding mode (obsolete).");
+
+/*
+ * ptlrpcd_per_cpt_max: The maximum number of ptlrpcd threads to run
+ * in a CPT.
+ */
+static int ptlrpcd_per_cpt_max;
+module_param(ptlrpcd_per_cpt_max, int, 0644);
+MODULE_PARM_DESC(ptlrpcd_per_cpt_max,
+ "Max ptlrpcd thread count to be started per CPT.");
+
+/*
+ * ptlrpcd_partner_group_size: The desired number of threads in each
+ * ptlrpcd partner thread group. Default is 2, corresponding to the
+ * old PDB_POLICY_PAIR. A negative value makes all ptlrpcd threads in
+ * a CPT partners of each other.
+ */
+static int ptlrpcd_partner_group_size;
+module_param(ptlrpcd_partner_group_size, int, 0644);
+MODULE_PARM_DESC(ptlrpcd_partner_group_size,
+ "Number of ptlrpcd threads in a partner group.");
+
+/*
+ * ptlrpcd_cpts: A CPT string describing the CPU partitions that
+ * ptlrpcd threads should run on. Used to make ptlrpcd threads run on
+ * a subset of all CPTs.
+ *
+ * ptlrpcd_cpts=2
+ * ptlrpcd_cpts=[2]
+ * run ptlrpcd threads only on CPT 2.
+ *
+ * ptlrpcd_cpts=0-3
+ * ptlrpcd_cpts=[0-3]
+ * run ptlrpcd threads on CPTs 0, 1, 2, and 3.
+ *
+ * ptlrpcd_cpts=[0-3,5,7]
+ * run ptlrpcd threads on CPTS 0, 1, 2, 3, 5, and 7.
+ */
+static char *ptlrpcd_cpts;
+module_param(ptlrpcd_cpts, charp, 0644);
+MODULE_PARM_DESC(ptlrpcd_cpts,
+ "CPU partitions ptlrpcd threads should run in");
+
+/* ptlrpcds_cpt_idx maps cpt numbers to an index in the ptlrpcds array. */
+static int *ptlrpcds_cpt_idx;
+
+/* ptlrpcds_num is the number of entries in the ptlrpcds array. */
+static int ptlrpcds_num;
+static struct ptlrpcd **ptlrpcds;
+
+/*
+ * In addition to the regular thread pool above, there is a single
+ * global recovery thread. Recovery isn't critical for performance,
+ * and doesn't block, but must always be able to proceed, and it is
+ * possible that all normal ptlrpcd threads are blocked. Hence the
+ * need for a dedicated thread.
+ */
+static struct ptlrpcd_ctl ptlrpcd_rcv;