lnet/klnds/gnilnd/gnilnd_modparams.c

   1 /*
   2  * Copyright (C) 2004 Cluster File Systems, Inc.
   3  *
   4  * Copyright (C) 2009-2012 Cray, Inc.
   5  *
   6  *   Derived from work by: Eric Barton <eric@bartonsoftware.com>
   7  *   Author: Nic Henke <nic@cray.com>
   8  *
   9  *   This file is part of Lustre, http://www.lustre.org.
  10  *
  11  *   Lustre is free software; you can redistribute it and/or
  12  *   modify it under the terms of version 2 of the GNU General Public
  13  *   License as published by the Free Software Foundation.
  14  *
  15  *   Lustre is distributed in the hope that it will be useful,
  16  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *   GNU General Public License for more details.
  19  *
  20  *   You should have received a copy of the GNU General Public License
  21  *   along with Lustre; if not, write to the Free Software
  22  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23  *
  24  */
  25
  26 #include "gnilnd.h"
  27
  28 static int credits = 256;
  29 CFS_MODULE_PARM(credits, "i", int, 0444,
  30                 "# concurrent sends");
  31
  32 static int eager_credits = 256 * 1024;
  33 CFS_MODULE_PARM(eager_credits, "i", int, 0644,
  34                 "# eager buffers");
  35
  36 static int peer_credits = 16;
  37 CFS_MODULE_PARM(peer_credits, "i", int, 0444,
  38                 "# LNet peer credits");
  39
  40 /* NB - we'll not actually limit sends to this, we just size the mailbox buffer
  41  * such that at most we'll have concurrent_sends * max_immediate messages
  42  * in the mailbox */
  43 static int concurrent_sends = 0;
  44 CFS_MODULE_PARM(concurrent_sends, "i", int, 0444,
  45                 "# concurrent HW sends to 1 peer");
  46
  47 /* default for 2k nodes @ 16 peer credits */
  48 static int fma_cq_size = 32768;
  49 CFS_MODULE_PARM(fma_cq_size, "i", int, 0444,
  50                 "size of the completion queue");
  51
  52 static int timeout = GNILND_BASE_TIMEOUT;
  53 /* can't change @ runtime because LNet gets NI data at startup from
  54  * this value */
  55 CFS_MODULE_PARM(timeout, "i", int, 0444,
  56                 "communications timeout (seconds)");
  57
  58 /* time to wait between datagram timeout and sending of next dgram */
  59 static int min_reconnect_interval = GNILND_MIN_RECONNECT_TO;
  60 CFS_MODULE_PARM(min_reconnect_interval, "i", int, 0644,
  61                 "minimum connection retry interval (seconds)");
  62
  63 /* if this goes longer than timeout, we'll timeout the TX before
  64  * the dgram */
  65 static int max_reconnect_interval = GNILND_MAX_RECONNECT_TO;
  66 CFS_MODULE_PARM(max_reconnect_interval, "i", int, 0644,
  67                 "maximum connection retry interval (seconds)");
  68
  69 static int max_immediate = 2048;
  70 CFS_MODULE_PARM(max_immediate, "i", int, 0444,
  71                 "immediate/RDMA breakpoint");
  72
  73 static int checksum = GNILND_CHECKSUM_DEFAULT;
  74 CFS_MODULE_PARM(checksum, "i", int, 0644,
  75                 "0: None, 1: headers, 2: short msg, 3: all traffic");
  76
  77 static int checksum_dump = 0;
  78 CFS_MODULE_PARM(checksum_dump, "i", int, 0644,
  79                 "0: None, 1: dump log on failure, 2: payload data to D_INFO log");
  80
  81 static int bte_dlvr_mode = GNILND_RDMA_DLVR_OPTION;
  82 CFS_MODULE_PARM(bte_dlvr_mode, "i", int, 0644,
  83                 "enable hashing for BTE (RDMA) transfers");
  84
  85 static int bte_relaxed_ordering = 1;
  86 CFS_MODULE_PARM(bte_relaxed_ordering, "i", int, 0644,
  87                 "enable relaxed ordering (PASSPW) for BTE (RDMA) transfers");
  88
  89 #ifdef CONFIG_MK1OM
  90 static int ptag = GNI_PTAG_LND_KNC;
  91 #else
  92 static int ptag = GNI_PTAG_LND;
  93 #endif
  94 CFS_MODULE_PARM(ptag, "i", int, 0444,
  95                 "ptag for Gemini CDM");
  96
  97 static int pkey = GNI_JOB_CREATE_COOKIE(GNI_PKEY_LND, 0);
  98 CFS_MODULE_PARM(pkey, "i", int, 0444, "pkey for CDM");
  99
 100 static int max_retransmits = 1024;
 101 CFS_MODULE_PARM(max_retransmits, "i", int, 0444,
 102                 "max retransmits for FMA");
 103
 104 static int nwildcard = 4;
 105 CFS_MODULE_PARM(nwildcard, "i", int, 0444,
 106                 "# wildcard datagrams to post per net (interface)");
 107
 108 static int nice = -20;
 109 CFS_MODULE_PARM(nice, "i", int, 0444,
 110                 "nice value for kgnilnd threads, default -20");
 111
 112 static int rdmaq_intervals = 4;
 113 CFS_MODULE_PARM(rdmaq_intervals, "i", int, 0644,
 114                 "# intervals per second for rdmaq throttling, default 4, 0 to disable");
 115
 116 static int loops = 100;
 117 CFS_MODULE_PARM(loops, "i", int, 0644,
 118                 "# of loops before scheduler is friendly, default 100");
 119
 120 static int hash_size = 503;
 121 CFS_MODULE_PARM(hash_size, "i", int, 0444,
 122                 "prime number for peer/conn hash sizing, default 503");
 123
 124 static int peer_health = 0;
 125 CFS_MODULE_PARM(peer_health, "i", int, 0444,
 126                 "Disable peer timeout for LNet peer health, default off, > 0 to enable");
 127
 128 static int peer_timeout = -1;
 129 CFS_MODULE_PARM(peer_timeout, "i", int, 0444,
 130                 "Peer timeout used for peer_health, default based on gnilnd timeout, > -1 to manually set");
 131
 132 static int vmap_cksum = 0;
 133 CFS_MODULE_PARM(vmap_cksum, "i", int, 0644,
 134                 "use vmap for all kiov checksumming, default off");
 135
 136 static int mbox_per_block = GNILND_FMABLK;
 137 CFS_MODULE_PARM(mbox_per_block, "i", int, 0644,
 138                 "mailboxes per block");
 139
 140 static int nphys_mbox = 0;
 141 CFS_MODULE_PARM(nphys_mbox, "i", int, 0444,
 142                 "# mbox to preallocate from physical memory, default 0");
 143
 144 static int mbox_credits = GNILND_MBOX_CREDITS;
 145 CFS_MODULE_PARM(mbox_credits, "i", int, 0644,
 146                 "number of credits per mailbox");
 147
 148 static int sched_threads = GNILND_SCHED_THREADS;
 149 CFS_MODULE_PARM(sched_threads, "i", int, 0444,
 150                 "number of threads for moving data");
 151
 152 static int net_hash_size = 11;
 153 CFS_MODULE_PARM(net_hash_size, "i", int, 0444,
 154                 "prime number for net hash sizing, default 11");
 155
 156 static int hardware_timeout = GNILND_HARDWARE_TIMEOUT;
 157 CFS_MODULE_PARM(hardware_timeout, "i", int, 0444,
 158                 "maximum time for traffic to get from one node to another");
 159
 160 static int mdd_timeout = GNILND_MDD_TIMEOUT;
 161 CFS_MODULE_PARM(mdd_timeout, "i", int, 0644,
 162                 "maximum time (in minutes) for mdd to be held");
 163
 164 static int sched_timeout = GNILND_SCHED_TIMEOUT;
 165 CFS_MODULE_PARM(sched_timeout, "i", int, 0644,
 166                 "scheduler aliveness in seconds max time");
 167
 168 static int sched_nice = GNILND_SCHED_NICE;
 169 CFS_MODULE_PARM(sched_nice, "i", int, 0444,
 170                 "scheduler's nice setting, default compute 0 service -20");
 171
 172 static int reverse_rdma = GNILND_REVERSE_RDMA;
 173 CFS_MODULE_PARM(reverse_rdma, "i", int, 0644,
 174                 "Normal 0: Reverse GET: 1 Reverse Put: 2 Reverse Both: 3");
 175
 176 static int dgram_timeout = GNILND_DGRAM_TIMEOUT;
 177 CFS_MODULE_PARM(dgram_timeout, "i", int, 0644,
 178                 "dgram thread aliveness seconds max time");
 179
 180 static int efault_lbug = 0;
 181 CFS_MODULE_PARM(efault_lbug, "i", int, 0644,
 182                 "If a compute receives an EFAULT in"
 183                 " a message should it LBUG. 0 off 1 on");
 184
 185 static int fast_reconn = GNILND_FAST_RECONNECT;
 186 CFS_MODULE_PARM(fast_reconn, "i", int, 0644,
 187                 "fast reconnect on connection timeout");
 188
 189 static int max_conn_purg = GNILND_PURGATORY_MAX;
 190 CFS_MODULE_PARM(max_conn_purg, "i", int, 0644,
 191                 "Max number of connections per peer in purgatory");
 192
 193 static int thread_affinity = 0;
 194 CFS_MODULE_PARM(thread_affinity, "i", int, 0444,
 195                 "scheduler thread affinity default 0 (disabled)");
 196
 197 static int thread_safe = GNILND_TS_ENABLE;
 198 CFS_MODULE_PARM(thread_safe, "i", int, 0444,
 199                 "Use kgni thread safe API if available");
 200
 201 kgn_tunables_t kgnilnd_tunables = {
 202         .kgn_min_reconnect_interval = &min_reconnect_interval,
 203         .kgn_max_reconnect_interval = &max_reconnect_interval,
 204         .kgn_credits                = &credits,
 205         .kgn_peer_credits           = &peer_credits,
 206         .kgn_concurrent_sends       = &concurrent_sends,
 207         .kgn_fma_cq_size            = &fma_cq_size,
 208         .kgn_timeout                = &timeout,
 209         .kgn_max_immediate          = &max_immediate,
 210         .kgn_checksum               = &checksum,
 211         .kgn_checksum_dump          = &checksum_dump,
 212         .kgn_bte_dlvr_mode          = &bte_dlvr_mode,
 213         .kgn_bte_relaxed_ordering   = &bte_relaxed_ordering,
 214         .kgn_ptag                   = &ptag,
 215         .kgn_pkey                   = &pkey,
 216         .kgn_max_retransmits        = &max_retransmits,
 217         .kgn_nwildcard              = &nwildcard,
 218         .kgn_nice                   = &nice,
 219         .kgn_rdmaq_intervals        = &rdmaq_intervals,
 220         .kgn_loops                  = &loops,
 221         .kgn_peer_hash_size         = &hash_size,
 222         .kgn_peer_health            = &peer_health,
 223         .kgn_peer_timeout           = &peer_timeout,
 224         .kgn_vmap_cksum             = &vmap_cksum,
 225         .kgn_mbox_per_block         = &mbox_per_block,
 226         .kgn_nphys_mbox             = &nphys_mbox,
 227         .kgn_mbox_credits           = &mbox_credits,
 228         .kgn_sched_threads          = &sched_threads,
 229         .kgn_net_hash_size          = &net_hash_size,
 230         .kgn_hardware_timeout       = &hardware_timeout,
 231         .kgn_mdd_timeout            = &mdd_timeout,
 232         .kgn_sched_timeout          = &sched_timeout,
 233         .kgn_sched_nice             = &sched_nice,
 234         .kgn_reverse_rdma           = &reverse_rdma,
 235         .kgn_dgram_timeout          = &dgram_timeout,
 236         .kgn_eager_credits          = &eager_credits,
 237         .kgn_fast_reconn            = &fast_reconn,
 238         .kgn_efault_lbug            = &efault_lbug,
 239         .kgn_thread_affinity        = &thread_affinity,
 240         .kgn_thread_safe            = &thread_safe,
 241         .kgn_max_purgatory          = &max_conn_purg
 242 };
 243
 244 #if CONFIG_SYSCTL && !CFS_SYSFS_MODULE_PARM
 245 static struct ctl_table kgnilnd_ctl_table[] = {
 246         {
 247                 INIT_CTL_NAME
 248                 .procname = "min_reconnect_interval",
 249                 .data     = &min_reconnect_interval,
 250                 .maxlen   = sizeof(int),
 251                 .mode     = 0644,
 252                 .proc_handler = &proc_dointvec
 253         },
 254         {
 255                 INIT_CTL_NAME
 256                 .procname = "max_reconnect_interval",
 257                 .data     = &max_reconnect_interval,
 258                 .maxlen   = sizeof(int),
 259                 .mode     = 0644,
 260                 .proc_handler = &proc_dointvec
 261         },
 262         {
 263                 INIT_CTL_NAME
 264                 .procname = "credits",
 265                 .data     = &credits,
 266                 .maxlen   = sizeof(int),
 267                 .mode     = 0444,
 268                 .proc_handler = &proc_dointvec
 269         },
 270         {
 271                 INIT_CTL_NAME
 272                 .procname = "peer_credits",
 273                 .data     = &peer_credits,
 274                 .maxlen   = sizeof(int),
 275                 .mode     = 0444,
 276                 .proc_handler = &proc_dointvec
 277         },
 278         {
 279                 INIT_CTL_NAME
 280                 .procname = "fma_cq_size",
 281                 .data     = &fma_cq_size,
 282                 .maxlen   = sizeof(int),
 283                 .mode     = 0444,
 284                 .proc_handler = &proc_dointvec
 285         },
 286         {
 287                 INIT_CTL_NAME
 288                 .procname = "timeout",
 289                 .data     = &timeout,
 290                 .maxlen   = sizeof(int),
 291                 .mode     = 0444,
 292                 .proc_handler = &proc_dointvec
 293         },
 294         {
 295                 INIT_CTL_NAME
 296                 .procname = "max_immediate",
 297                 .data     = &max_immediate,
 298                 .maxlen   = sizeof(int),
 299                 .mode     = 0444,
 300                 .proc_handler = &proc_dointvec
 301         },
 302         {
 303                 INIT_CTL_NAME
 304                 .procname = "checksum",
 305                 .data     = &checksum,
 306                 .maxlen   = sizeof(int),
 307                 .mode     = 0644,
 308                 .proc_handler = &proc_dointvec
 309         },
 310         {
 311                 INIT_CTL_NAME
 312                 .procname = "bte_dlvr_mode",
 313                 .data     = &bte_dlvr_mode,
 314                 .maxlen   = sizeof(int),
 315                 .mode     = 0644,
 316                 .proc_handler = &proc_dointvec
 317         },
 318         {
 319                 INIT_CTL_NAME
 320                 .procname = "ptag",
 321                 .data     = &ptag,
 322                 .maxlen   = sizeof(int),
 323                 .mode     = 0444,
 324                 .proc_handler = &proc_dointvec
 325         },
 326         {
 327                 INIT_CTL_NAME
 328                 .procname = "pkey",
 329                 .data     = &pkey,
 330                 .maxlen   = sizeof(int),
 331                 .mode     = 0444,
 332                 .proc_handler = &proc_dointvec
 333         },
 334         {
 335                 INIT_CTL_NAME
 336                 .procname = "nwildcard",
 337                 .data     = &nwildcard,
 338                 .maxlen   = sizeof(int),
 339                 .mode     = 0444,
 340                 .proc_handler = &proc_dointvec
 341         },
 342         {
 343                 INIT_CTL_NAME
 344                 .procname = "bte_relaxed_ordering",
 345                 .data     = &bte_relaxed_ordering,
 346                 .maxlen   = sizeof(int),
 347                 .mode     = 0644,
 348                 .proc_handler = &proc_dointvec
 349         },
 350         {
 351                 INIT_CTL_NAME
 352                 .procname = "checksum_dump",
 353                 .data     = &checksum_dump,
 354                 .maxlen   = sizeof(int),
 355                 .mode     = 0644,
 356                 .proc_handler = &proc_dointvec
 357         },
 358         {
 359                 INIT_CTL_NAME
 360                 .procname = "nice",
 361                 .data     = &nice,
 362                 .maxlen   = sizeof(int),
 363                 .mode     = 0444,
 364                 .proc_handler = &proc_dointvec
 365         },
 366         {
 367                 INIT_CTL_NAME
 368                 .procname = "rdmaq_intervals",
 369                 .data     = &rdmaq_intervals,
 370                 .maxlen   = sizeof(int),
 371                 .mode     = 0644,
 372                 .proc_handler = &proc_dointvec
 373         },
 374         {
 375                 INIT_CTL_NAME
 376                 .procname = "loops",
 377                 .data     = &loops,
 378                 .maxlen   = sizeof(int),
 379                 .mode     = 0644,
 380                 .proc_handler = &proc_dointvec
 381         },
 382         {
 383                 INIT_CTL_NAME
 384                 .procname = "hash_size",
 385                 .data     = &hash_size,
 386                 .maxlen   = sizeof(int),
 387                 .mode     = 0444,
 388                 .proc_handler = &proc_dointvec
 389         },
 390         {
 391                 INIT_CTL_NAME
 392                 .procname = "peer_health",
 393                 .data     = &peer_health,
 394                 .maxlen   = sizeof(int),
 395                 .mode     = 0444,
 396                 .proc_handler = &proc_dointvec
 397         },
 398         {
 399                 INIT_CTL_NAME
 400                 .procname = "vmap_cksum",
 401                 .data     = &vmap_cksum,
 402                 .maxlen   = sizeof(int),
 403                 .mode     = 0644,
 404                 .proc_handler = &proc_dointvec
 405         },
 406         {
 407                 INIT_CTL_NAME
 408                 .procname = "mbox_per_block",
 409                 .data     = &mbox_per_block,
 410                 .maxlen   = sizeof(int),
 411                 .mode     = 0644,
 412                 .proc_handler = &proc_dointvec
 413         },
 414         {
 415                 INIT_CTL_NAME
 416                 .procname = "mbox_credits"
 417                 .data     = &mbox_credits,
 418                 .maxlen   = sizeof(int),
 419                 .mode     = 0644,
 420                 .proc_handler = &proc_dointvec
 421         },
 422         {
 423                 INIT_CTL_NAME
 424                 .procname = "sched_threads"
 425                 .data     = &sched_threads,
 426                 .maxlen   = sizeof(int),
 427                 .mode     = 0444,
 428                 .proc_handler = &proc_dointvec
 429         },
 430         {
 431                 INIT_CTL_NAME
 432                 .procname = "net_hash_size",
 433                 .data     = &net_hash_size,
 434                 .maxlen   = sizeof(int),
 435                 .mode     = 0444,
 436                 .proc_handler = &proc_dointvec
 437         },
 438         {
 439                 INIT_CTL_NAME
 440                 .procname = "hardware_timeout",
 441                 .data     = &hardware_timeout,
 442                 .maxlen   = sizeof(int),
 443                 .mode     = 0444,
 444                 .proc_handler = &proc_dointvec
 445         },
 446         {
 447                 INIT_CTL_NAME
 448                 .procname = "mdd_timeout",
 449                 .data     = &mdd_timeout,
 450                 .maxlen   = sizeof(int),
 451                 .mode     = 0644,
 452                 .proc_handler = &proc_dointvec
 453         },
 454         {
 455                 INIT_CTL_NAME
 456                 .procname = "max_retransmits"
 457                 .data     = &max_retransmits,
 458                 .maxlen   = sizeof(int),
 459                 .mode     = 0444,
 460                 .proc_handler = &proc_dointvec
 461         },
 462         {
 463                 INIT_CTL_NAME
 464                 .procname = "concurrent_sends",
 465                 .data     = &concurrent_sends,
 466                 .maxlen   = sizeof(int),
 467                 .mode     = 0444,
 468                 .proc_handler = &proc_dointvec
 469         },
 470         {
 471                 INIT_CTL_NAME
 472                 .procname = "nphys_mbox",
 473                 .data     = &nphys_mbox,
 474                 .maxlen   = sizeof(int),
 475                 .mode     = 0444,
 476                 .proc_handler = &proc_dointvec
 477         },
 478         {
 479                 INIT_CTL_NAME
 480                 .procname = "sched_timeout",
 481                 .data     = &sched_timeout,
 482                 .maxlen   = sizeof(int),
 483                 .mode     = 0644,
 484                 .proc_handler = &proc_dointvec
 485         },
 486         {
 487                 INIT_CTL_NAME
 488                 .procname = "sched_nice",
 489                 .data     = &sched_nice,
 490                 .maxlen   = sizeof(int),
 491                 .mode     = 0444,
 492                 .proc_handler = &proc_dointvec
 493         },
 494         {
 495                 INIT_CTL_NAME
 496                 .procname = "reverse_rdma",
 497                 .data     = &reverse_rdma,
 498                 .maxlen   = sizeof(int),
 499                 .mode     = 0644,
 500                 .proc_handler = &proc_dointvec
 501         },
 502                 INIT_CTL_NAME
 503                 .procname = "dgram_timeout"
 504                 .data     = &dgram_timeout,
 505                 .maxlen   = sizeof(int),
 506                 .mode     = 0644,
 507                 .proc_handler = &proc_dointvec
 508         },
 509         {
 510                 INIT_CTL_NAME
 511                 .procname = "peer_timeout"
 512                 .data     = &peer_timeout,
 513                 .maxlen   = sizeof(int),
 514                 .mode     = 0444,
 515                 .proc_handler = &proc_dointvec
 516         },
 517         {
 518                 INIT_CTL_NAME
 519                 .procname = "eager_credits",
 520                 .data     = &eager_credits,
 521                 .maxlen   = sizeof(int),
 522                 .mode     = 0644,
 523                 .proc_handler = &proc_dointvec
 524         },
 525         {
 526                 INIT_CTL_NAME
 527                 .procname = "efault_lbug"
 528                 .data     = &efault_lbug,
 529                 .maxlen   = sizeof(int),
 530                 .mode     = 0644,
 531                 .proc_handler = &proc_dointvec
 532         },
 533         {
 534                 INIT_CTL_NAME
 535                 .procname = "thread_affinity"
 536                 .data     = &thread_affinity,
 537                 .maxlen   = sizeof(int),
 538                 .mode     = 0444,
 539                 .proc_handler = &proc_dointvec
 540         },
 541         {
 542                 INIT_CTL_NAME
 543                 .procname = "thread_safe"
 544                 .data     = &thread_safe,
 545                 .maxlen   = sizeof(int),
 546                 .mode     = 0444,
 547                 .proc_handler = &proc_dointvec
 548         },
 549         {
 550                 INIT_CTL_NAME
 551                 .procname = "max_conn_purg"
 552                 .data     = &max_conn_purg,
 553                 .maxlen   = sizeof(int),
 554                 .mode     = 0644,
 555                 .proc_handler = &proc_dointvec
 556         },
 557         { 0 }
 558 };
 559
 560 static struct ctl_table kgnilnd_top_ctl_table[] = {
 561         {
 562                 INIT_CTL_NAME
 563                 .procname = "gnilnd",
 564                 .data     = NULL,
 565                 .maxlen   = 0,
 566                 .mode     = 0555,
 567                 .child    = kgnilnd_ctl_table
 568         },
 569         { 0 }
 570 };
 571 #endif
 572
 573 int
 574 kgnilnd_tunables_init()
 575 {
 576         int rc = 0;
 577
 578 #if CONFIG_SYSCTL && !CFS_SYSFS_MODULE_PARM
 579         kgnilnd_tunables.kgn_sysctl =
 580                 register_sysctl_table(kgnilnd_top_ctl_table, 0);
 581
 582         if (kgnilnd_tunables.kgn_sysctl == NULL)
 583                 CWARN("Can't setup /proc tunables\n");
 584 #endif
 585         switch (*kgnilnd_tunables.kgn_checksum) {
 586         default:
 587                 CERROR("Invalid checksum module parameter: %d\n",
 588                        *kgnilnd_tunables.kgn_checksum);
 589                 rc = -EINVAL;
 590                 GOTO(out, rc);
 591         case GNILND_CHECKSUM_OFF:
 592                 /* no checksumming */
 593                 break;
 594         case GNILND_CHECKSUM_SMSG_HEADER:
 595                 LCONSOLE_INFO("SMSG header only checksumming enabled\n");
 596                 break;
 597         case GNILND_CHECKSUM_SMSG:
 598                 LCONSOLE_INFO("SMSG checksumming enabled\n");
 599                 break;
 600         case GNILND_CHECKSUM_SMSG_BTE:
 601                 LCONSOLE_INFO("SMSG + BTE checksumming enabled\n");
 602                 break;
 603         }
 604
 605         if (*kgnilnd_tunables.kgn_max_immediate > GNILND_MAX_IMMEDIATE) {
 606                 LCONSOLE_ERROR("kgnilnd module parameter 'max_immediate' too large %d > %d\n",
 607                 *kgnilnd_tunables.kgn_max_immediate, GNILND_MAX_IMMEDIATE);
 608                 rc = -EINVAL;
 609                 GOTO(out, rc);
 610         }
 611
 612         if (*kgnilnd_tunables.kgn_mbox_per_block < 1) {
 613                 *kgnilnd_tunables.kgn_mbox_per_block = 1;
 614         }
 615
 616         if (*kgnilnd_tunables.kgn_concurrent_sends == 0) {
 617                 *kgnilnd_tunables.kgn_concurrent_sends = *kgnilnd_tunables.kgn_peer_credits;
 618         } else if (*kgnilnd_tunables.kgn_concurrent_sends > *kgnilnd_tunables.kgn_peer_credits) {
 619                 LCONSOLE_ERROR("kgnilnd parameter 'concurrent_sends' too large: %d > %d (peer_credits)\n",
 620                                *kgnilnd_tunables.kgn_concurrent_sends, *kgnilnd_tunables.kgn_peer_credits);
 621                 rc = -EINVAL;
 622         }
 623 out:
 624         return rc;
 625 }
 626
 627 void
 628 kgnilnd_tunables_fini()
 629 {
 630 #if CONFIG_SYSCTL && !CFS_SYSFS_MODULE_PARM
 631         if (kgnilnd_tunables.kgn_sysctl != NULL)
 632                 unregister_sysctl_table(kgnilnd_tunables.kgn_sysctl);
 633 #endif
 634 }