4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lnet/klnds/ptllnd/ptllnd_cb.c
38 * Author: PJ Kirner <pjkirner@clusterfs.com>
43 #ifndef _USING_LUSTRE_PORTALS_
45 kptllnd_extract_iov (int dst_niov, ptl_md_iovec_t *dst,
46 int src_niov, struct iovec *src,
47 unsigned int offset, unsigned int len)
49 /* Initialise 'dst' to the subset of 'src' starting at 'offset',
50 * for exactly 'len' bytes, and return the number of entries.
51 * NB not destructive to 'src' */
52 unsigned int frag_len;
55 if (len == 0) /* no data => */
56 return (0); /* no frags */
58 LASSERT (src_niov > 0);
59 while (offset >= src->iov_len) { /* skip initial frags */
60 offset -= src->iov_len;
63 LASSERT (src_niov > 0);
68 LASSERT (src_niov > 0);
69 LASSERT (niov <= dst_niov);
71 frag_len = src->iov_len - offset;
72 dst->iov_base = ((char *)src->iov_base) + offset;
74 if (len <= frag_len) {
79 dst->iov_len = frag_len;
91 kptllnd_extract_phys (int dst_niov, ptl_md_iovec_t *dst,
92 int src_niov, lnet_kiov_t *src,
93 unsigned int offset, unsigned int len)
95 /* Initialise 'dst' to the physical addresses of the subset of 'src'
96 * starting at 'offset', for exactly 'len' bytes, and return the number
97 * of entries. NB not destructive to 'src' */
98 unsigned int frag_len;
103 if (len == 0) /* no data => */
104 return (0); /* no frags */
106 LASSERT (src_niov > 0);
107 while (offset >= src->kiov_len) { /* skip initial frags */
108 offset -= src->kiov_len;
111 LASSERT (src_niov > 0);
116 LASSERT (src_niov > 0);
117 LASSERT (niov <= dst_niov);
119 frag_len = min(src->kiov_len - offset, len);
120 phys_page = lnet_page2phys(src->kiov_page);
121 phys = phys_page + src->kiov_offset + offset;
123 LASSERT (sizeof(void *) > 4 ||
124 (phys <= 0xffffffffULL &&
125 phys + (frag_len - 1) <= 0xffffffffULL));
127 dst->iov_base = (void *)((unsigned long)phys);
128 dst->iov_len = frag_len;
144 kptllnd_init_rdma_md(kptl_tx_t *tx, unsigned int niov,
145 struct iovec *iov, lnet_kiov_t *kiov,
146 unsigned int offset, unsigned int nob)
148 LASSERT (iov == NULL || kiov == NULL);
150 memset(&tx->tx_rdma_md, 0, sizeof(tx->tx_rdma_md));
152 tx->tx_rdma_md.start = tx->tx_frags;
153 tx->tx_rdma_md.user_ptr = &tx->tx_rdma_eventarg;
154 tx->tx_rdma_md.eq_handle = kptllnd_data.kptl_eqh;
155 tx->tx_rdma_md.options = PTL_MD_LUSTRE_COMPLETION_SEMANTICS |
156 PTL_MD_EVENT_START_DISABLE;
157 switch (tx->tx_type) {
161 case TX_TYPE_PUT_REQUEST: /* passive: peer gets */
162 tx->tx_rdma_md.threshold = 1; /* GET event */
163 tx->tx_rdma_md.options |= PTL_MD_OP_GET;
166 case TX_TYPE_GET_REQUEST: /* passive: peer puts */
167 tx->tx_rdma_md.threshold = 1; /* PUT event */
168 tx->tx_rdma_md.options |= PTL_MD_OP_PUT;
171 case TX_TYPE_PUT_RESPONSE: /* active: I get */
172 tx->tx_rdma_md.threshold = 2; /* SEND + REPLY */
175 case TX_TYPE_GET_RESPONSE: /* active: I put */
176 tx->tx_rdma_md.threshold = tx->tx_acked ? 2 : 1; /* SEND + ACK? */
181 tx->tx_rdma_md.length = 0;
185 #ifdef _USING_LUSTRE_PORTALS_
187 tx->tx_rdma_md.options |= PTL_MD_IOVEC;
188 tx->tx_rdma_md.length =
189 lnet_extract_iov(PTL_MD_MAX_IOV, tx->tx_frags->iov,
190 niov, iov, offset, nob);
194 /* Cheating OK since ptl_kiov_t == lnet_kiov_t */
195 CLASSERT(sizeof(ptl_kiov_t) == sizeof(lnet_kiov_t));
196 CLASSERT(offsetof(ptl_kiov_t, kiov_offset) ==
197 offsetof(lnet_kiov_t, kiov_offset));
198 CLASSERT(offsetof(ptl_kiov_t, kiov_page) ==
199 offsetof(lnet_kiov_t, kiov_page));
200 CLASSERT(offsetof(ptl_kiov_t, kiov_len) ==
201 offsetof(lnet_kiov_t, kiov_len));
203 tx->tx_rdma_md.options |= PTL_MD_KIOV;
204 tx->tx_rdma_md.length =
205 lnet_extract_kiov(PTL_MD_MAX_IOV, tx->tx_frags->kiov,
206 niov, kiov, offset, nob);
209 tx->tx_rdma_md.options |= PTL_MD_IOVEC;
210 tx->tx_rdma_md.length =
211 kptllnd_extract_iov(PTL_MD_MAX_IOV, tx->tx_frags->iov,
212 niov, iov, offset, nob);
216 tx->tx_rdma_md.options |= PTL_MD_IOVEC | PTL_MD_PHYS;
217 tx->tx_rdma_md.length =
218 kptllnd_extract_phys(PTL_MD_MAX_IOV, tx->tx_frags->iov,
219 niov, kiov, offset, nob);
224 kptllnd_active_rdma(kptl_rx_t *rx, lnet_msg_t *lntmsg, int type,
225 unsigned int niov, struct iovec *iov, lnet_kiov_t *kiov,
226 unsigned int offset, int nob)
230 kptl_msg_t *rxmsg = rx->rx_msg;
231 kptl_peer_t *peer = rx->rx_peer;
235 LASSERT (type == TX_TYPE_PUT_RESPONSE ||
236 type == TX_TYPE_GET_RESPONSE);
238 tx = kptllnd_get_idle_tx(type);
240 CERROR ("Can't do %s rdma to %s: can't allocate descriptor\n",
241 type == TX_TYPE_PUT_RESPONSE ? "GET" : "PUT",
242 libcfs_id2str(peer->peer_id));
246 kptllnd_set_tx_peer(tx, peer);
247 kptllnd_init_rdma_md(tx, niov, iov, kiov, offset, nob);
249 ptlrc = PtlMDBind(kptllnd_data.kptl_nih, tx->tx_rdma_md,
251 if (ptlrc != PTL_OK) {
252 CERROR("PtlMDBind(%s) failed: %s(%d)\n",
253 libcfs_id2str(peer->peer_id),
254 kptllnd_errtype2str(ptlrc), ptlrc);
255 tx->tx_status = -EIO;
256 kptllnd_tx_decref(tx);
260 spin_lock_irqsave(&peer->peer_lock, flags);
262 tx->tx_lnet_msg = lntmsg;
263 /* lnet_finalize() will be called when tx is torn down, so I must
264 * return success from here on... */
266 tx->tx_deadline = jiffies + (*kptllnd_tunables.kptl_timeout * HZ);
267 tx->tx_rdma_mdh = mdh;
269 cfs_list_add_tail(&tx->tx_list, &peer->peer_activeq);
271 /* peer has now got my ref on 'tx' */
273 spin_unlock_irqrestore(&peer->peer_lock, flags);
275 tx->tx_tposted = jiffies;
277 if (type == TX_TYPE_GET_RESPONSE)
279 tx->tx_acked ? PTL_ACK_REQ : PTL_NOACK_REQ,
281 *kptllnd_tunables.kptl_portal,
283 rxmsg->ptlm_u.rdma.kptlrm_matchbits,
285 (lntmsg != NULL) ? /* header data */
291 *kptllnd_tunables.kptl_portal,
293 rxmsg->ptlm_u.rdma.kptlrm_matchbits,
296 if (ptlrc != PTL_OK) {
297 CERROR("Ptl%s failed: %s(%d)\n",
298 (type == TX_TYPE_GET_RESPONSE) ? "Put" : "Get",
299 kptllnd_errtype2str(ptlrc), ptlrc);
301 kptllnd_peer_close(peer, -EIO);
302 /* Everything (including this RDMA) queued on the peer will
303 * be completed with failure */
310 kptllnd_send(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg)
312 lnet_hdr_t *hdr = &lntmsg->msg_hdr;
313 int type = lntmsg->msg_type;
314 lnet_process_id_t target = lntmsg->msg_target;
315 int target_is_router = lntmsg->msg_target_is_router;
316 int routing = lntmsg->msg_routing;
317 unsigned int payload_niov = lntmsg->msg_niov;
318 struct iovec *payload_iov = lntmsg->msg_iov;
319 lnet_kiov_t *payload_kiov = lntmsg->msg_kiov;
320 unsigned int payload_offset = lntmsg->msg_offset;
321 unsigned int payload_nob = lntmsg->msg_len;
322 kptl_net_t *net = ni->ni_data;
323 kptl_peer_t *peer = NULL;
330 LASSERT (net->net_ni == ni);
331 LASSERT (!net->net_shutdown);
332 LASSERT (payload_nob == 0 || payload_niov > 0);
333 LASSERT (payload_niov <= LNET_MAX_IOV);
334 LASSERT (payload_niov <= PTL_MD_MAX_IOV); /* !!! */
335 LASSERT (!(payload_kiov != NULL && payload_iov != NULL));
336 LASSERT (!cfs_in_interrupt());
338 if (lntmsg->msg_vmflush)
339 mpflag = cfs_memory_pressure_get_and_set();
341 rc = kptllnd_find_target(net, target, &peer);
345 /* NB peer->peer_id does NOT always equal target, be careful with
346 * which one to use */
354 /* Should the payload avoid RDMA? */
355 nob = offsetof(kptl_msg_t, ptlm_u.immediate.kptlim_payload[payload_nob]);
356 if (payload_kiov == NULL &&
357 nob <= peer->peer_max_msg_size)
360 tx = kptllnd_get_idle_tx(TX_TYPE_PUT_REQUEST);
362 CERROR("Can't send %s to %s: can't allocate descriptor\n",
363 lnet_msgtyp2str(type),
364 libcfs_id2str(target));
369 kptllnd_init_rdma_md(tx, payload_niov,
370 payload_iov, payload_kiov,
371 payload_offset, payload_nob);
373 tx->tx_lnet_msg = lntmsg;
374 tx->tx_msg->ptlm_u.rdma.kptlrm_hdr = *hdr;
375 kptllnd_init_msg (tx->tx_msg, PTLLND_MSG_TYPE_PUT,
376 target, sizeof(kptl_rdma_msg_t));
378 CDEBUG(D_NETTRACE, "%s: passive PUT p %d %p\n",
379 libcfs_id2str(target),
380 le32_to_cpu(lntmsg->msg_hdr.msg.put.ptl_index), tx);
382 kptllnd_tx_launch(peer, tx, 0);
386 /* routed gets don't RDMA */
387 if (target_is_router || routing)
390 /* Is the payload small enough not to need RDMA? */
391 nob = lntmsg->msg_md->md_length;
392 nob = offsetof(kptl_msg_t,
393 ptlm_u.immediate.kptlim_payload[nob]);
394 if (nob <= peer->peer_max_msg_size)
397 tx = kptllnd_get_idle_tx(TX_TYPE_GET_REQUEST);
399 CERROR("Can't send GET to %s: can't allocate descriptor\n",
400 libcfs_id2str(target));
405 tx->tx_lnet_replymsg = lnet_create_reply_msg(ni, lntmsg);
406 if (tx->tx_lnet_replymsg == NULL) {
407 CERROR("Failed to allocate LNET reply for %s\n",
408 libcfs_id2str(target));
409 kptllnd_tx_decref(tx);
414 if ((lntmsg->msg_md->md_options & LNET_MD_KIOV) == 0)
415 kptllnd_init_rdma_md(tx, lntmsg->msg_md->md_niov,
416 lntmsg->msg_md->md_iov.iov, NULL,
417 0, lntmsg->msg_md->md_length);
419 kptllnd_init_rdma_md(tx, lntmsg->msg_md->md_niov,
420 NULL, lntmsg->msg_md->md_iov.kiov,
421 0, lntmsg->msg_md->md_length);
423 tx->tx_lnet_msg = lntmsg;
424 tx->tx_msg->ptlm_u.rdma.kptlrm_hdr = *hdr;
425 kptllnd_init_msg (tx->tx_msg, PTLLND_MSG_TYPE_GET,
426 target, sizeof(kptl_rdma_msg_t));
428 CDEBUG(D_NETTRACE, "%s: passive GET p %d %p\n",
429 libcfs_id2str(target),
430 le32_to_cpu(lntmsg->msg_hdr.msg.put.ptl_index), tx);
432 kptllnd_tx_launch(peer, tx, 0);
436 CDEBUG(D_NET, "LNET_MSG_ACK\n");
437 LASSERT (payload_nob == 0);
441 /* I don't have to handle kiovs */
442 LASSERT (payload_nob == 0 || payload_iov != NULL);
444 tx = kptllnd_get_idle_tx(TX_TYPE_SMALL_MESSAGE);
446 CERROR("Can't send %s to %s: can't allocate descriptor\n",
447 lnet_msgtyp2str(type), libcfs_id2str(target));
452 tx->tx_lnet_msg = lntmsg;
453 tx->tx_msg->ptlm_u.immediate.kptlim_hdr = *hdr;
455 if (payload_nob == 0) {
458 tx->tx_frags->iov[0].iov_base = tx->tx_msg;
459 tx->tx_frags->iov[0].iov_len = offsetof(kptl_msg_t,
460 ptlm_u.immediate.kptlim_payload);
462 /* NB relying on lustre not asking for PTL_MD_MAX_IOV
464 #ifdef _USING_LUSTRE_PORTALS_
465 nfrag = 1 + lnet_extract_iov(PTL_MD_MAX_IOV - 1,
466 &tx->tx_frags->iov[1],
467 payload_niov, payload_iov,
468 payload_offset, payload_nob);
470 nfrag = 1 + kptllnd_extract_iov(PTL_MD_MAX_IOV - 1,
471 &tx->tx_frags->iov[1],
472 payload_niov, payload_iov,
473 payload_offset, payload_nob);
477 nob = offsetof(kptl_immediate_msg_t, kptlim_payload[payload_nob]);
478 kptllnd_init_msg(tx->tx_msg, PTLLND_MSG_TYPE_IMMEDIATE, target, nob);
480 CDEBUG(D_NETTRACE, "%s: immediate %s p %d %p\n",
481 libcfs_id2str(target),
482 lnet_msgtyp2str(lntmsg->msg_type),
483 (le32_to_cpu(lntmsg->msg_type) == LNET_MSG_PUT) ?
484 le32_to_cpu(lntmsg->msg_hdr.msg.put.ptl_index) :
485 (le32_to_cpu(lntmsg->msg_type) == LNET_MSG_GET) ?
486 le32_to_cpu(lntmsg->msg_hdr.msg.get.ptl_index) : -1,
489 kptllnd_tx_launch(peer, tx, nfrag);
492 if (lntmsg->msg_vmflush)
493 cfs_memory_pressure_restore(mpflag);
495 kptllnd_peer_decref(peer);
500 kptllnd_eager_recv(struct lnet_ni *ni, void *private,
501 lnet_msg_t *msg, void **new_privatep)
503 kptl_rx_t *rx = private;
505 CDEBUG(D_NET, "Eager RX=%p RXB=%p\n", rx, rx->rx_rxb);
507 /* I have to release my ref on rxb (if I have one) to ensure I'm an
508 * eager receiver, so I copy the incoming request from the buffer it
509 * landed in, into space reserved in the descriptor... */
511 #if (PTL_MD_LOCAL_ALIGN8 == 0)
512 if (rx->rx_rxb == NULL) /* already copied */
513 return 0; /* to fix alignment */
515 LASSERT(rx->rx_rxb != NULL);
517 LASSERT(rx->rx_nob <= *kptllnd_tunables.kptl_max_msg_size);
519 memcpy(rx->rx_space, rx->rx_msg, rx->rx_nob);
520 rx->rx_msg = (kptl_msg_t *)rx->rx_space;
522 kptllnd_rx_buffer_decref(rx->rx_rxb);
530 kptllnd_recv (lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg, int delayed,
531 unsigned int niov, struct iovec *iov, lnet_kiov_t *kiov,
532 unsigned int offset, unsigned int mlen, unsigned int rlen)
534 kptl_rx_t *rx = private;
535 kptl_msg_t *rxmsg = rx->rx_msg;
539 CDEBUG(D_NET, "%s niov=%d offset=%d mlen=%d rlen=%d\n",
540 kptllnd_msgtype2str(rxmsg->ptlm_type),
541 niov, offset, mlen, rlen);
543 LASSERT (mlen <= rlen);
545 LASSERT (!cfs_in_interrupt());
546 LASSERT (!(kiov != NULL && iov != NULL)); /* never both */
547 LASSERT (niov <= PTL_MD_MAX_IOV); /* !!! */
549 switch(rxmsg->ptlm_type)
556 case PTLLND_MSG_TYPE_IMMEDIATE:
557 CDEBUG(D_NET, "PTLLND_MSG_TYPE_IMMEDIATE %d,%d\n", mlen, rlen);
559 nob = offsetof(kptl_msg_t, ptlm_u.immediate.kptlim_payload[rlen]);
560 if (nob > rx->rx_nob) {
561 CERROR ("Immediate message from %s too big: %d(%d)\n",
562 libcfs_id2str(rx->rx_peer->peer_id), nob,
571 *kptllnd_tunables.kptl_max_msg_size,
572 rxmsg->ptlm_u.immediate.kptlim_payload,
578 *kptllnd_tunables.kptl_max_msg_size,
579 rxmsg->ptlm_u.immediate.kptlim_payload,
583 lnet_finalize (ni, lntmsg, 0);
587 case PTLLND_MSG_TYPE_GET:
588 CDEBUG(D_NET, "PTLLND_MSG_TYPE_GET %d,%d\n", mlen, rlen);
590 /* NB always send RDMA so the peer can complete. I send
591 * success/failure in the portals 'hdr_data' */
594 rc = kptllnd_active_rdma(rx, NULL,
595 TX_TYPE_GET_RESPONSE,
596 0, NULL, NULL, 0, 0);
598 rc = kptllnd_active_rdma(rx, lntmsg,
599 TX_TYPE_GET_RESPONSE,
607 case PTLLND_MSG_TYPE_PUT:
608 CDEBUG(D_NET, "PTLLND_MSG_TYPE_PUT %d,%d\n", mlen, rlen);
610 /* NB always send RDMA so the peer can complete; it'll be 0
611 * bytes if there was no match (lntmsg == NULL). I have no way
612 * to let my peer know this, but she's only interested in when
613 * the net has stopped accessing her buffer in any case. */
615 rc = kptllnd_active_rdma(rx, lntmsg, TX_TYPE_PUT_RESPONSE,
616 niov, iov, kiov, offset, mlen);
621 * We're done with the RX
623 kptllnd_rx_done(rx, PTLLND_POSTRX_PEER_CREDIT);
628 kptllnd_eq_callback(ptl_event_t *ev)
630 kptl_eventarg_t *eva = ev->md.user_ptr;
632 switch (eva->eva_type) {
636 case PTLLND_EVENTARG_TYPE_MSG:
637 case PTLLND_EVENTARG_TYPE_RDMA:
638 kptllnd_tx_callback(ev);
641 case PTLLND_EVENTARG_TYPE_BUF:
642 kptllnd_rx_buffer_callback(ev);
648 kptllnd_thread_fini (void)
650 cfs_atomic_dec(&kptllnd_data.kptl_nthreads);
654 kptllnd_thread_start(int (*fn)(void *arg), void *arg, char *name)
658 cfs_atomic_inc(&kptllnd_data.kptl_nthreads);
660 task = kthread_run(fn, arg, name);
662 CERROR("Failed to start thread: error %ld\n", PTR_ERR(task));
663 kptllnd_thread_fini();
665 return PTR_ERR(task);
669 kptllnd_watchdog(void *arg)
672 wait_queue_t waitlink;
675 unsigned long deadline = jiffies;
681 init_waitqueue_entry_current(&waitlink);
683 /* threads shut down in phase 2 after all peers have been destroyed */
684 while (kptllnd_data.kptl_shutdown < 2) {
686 timeout = (int)(deadline - jiffies);
690 int chunk = kptllnd_data.kptl_peer_hash_size;
693 /* Time to check for RDMA timeouts on a few more
694 * peers: I do checks every 'p' seconds on a
695 * proportion of the peer table and I need to check
696 * every connection 'n' times within a timeout
697 * interval, to ensure I detect a timeout on any
698 * connection within (n+1)/n times the timeout
701 if ((*kptllnd_tunables.kptl_timeout) > n * p)
702 chunk = (chunk * n * p) /
703 (*kptllnd_tunables.kptl_timeout);
707 for (i = 0; i < chunk; i++) {
708 kptllnd_peer_check_bucket(peer_index, stamp);
709 peer_index = (peer_index + 1) %
710 kptllnd_data.kptl_peer_hash_size;
718 kptllnd_handle_closing_peers();
720 set_current_state(TASK_INTERRUPTIBLE);
721 add_wait_queue_exclusive(&kptllnd_data.kptl_watchdog_waitq,
724 waitq_timedwait(&waitlink, TASK_INTERRUPTIBLE, timeout);
726 set_current_state (TASK_RUNNING);
727 remove_wait_queue(&kptllnd_data.kptl_watchdog_waitq, &waitlink);
730 kptllnd_thread_fini();
731 CDEBUG(D_NET, "<<<\n");
736 kptllnd_scheduler (void *arg)
739 wait_queue_t waitlink;
744 kptl_rx_buffer_t *rxb;
749 init_waitqueue_entry_current(&waitlink);
751 spin_lock_irqsave(&kptllnd_data.kptl_sched_lock, flags);
753 /* threads shut down in phase 2 after all peers have been destroyed */
754 while (kptllnd_data.kptl_shutdown < 2) {
758 if (!cfs_list_empty(&kptllnd_data.kptl_sched_rxq)) {
759 rx = cfs_list_entry (kptllnd_data.kptl_sched_rxq.next,
761 cfs_list_del(&rx->rx_list);
763 spin_unlock_irqrestore(&kptllnd_data. \
767 kptllnd_rx_parse(rx);
770 spin_lock_irqsave(&kptllnd_data.kptl_sched_lock,
774 if (!cfs_list_empty(&kptllnd_data.kptl_sched_rxbq)) {
775 rxb = cfs_list_entry (kptllnd_data.kptl_sched_rxbq.next,
778 cfs_list_del(&rxb->rxb_repost_list);
780 spin_unlock_irqrestore(&kptllnd_data. \
784 kptllnd_rx_buffer_post(rxb);
787 spin_lock_irqsave(&kptllnd_data.kptl_sched_lock,
791 if (!cfs_list_empty(&kptllnd_data.kptl_sched_txq)) {
792 tx = cfs_list_entry (kptllnd_data.kptl_sched_txq.next,
794 cfs_list_del_init(&tx->tx_list);
796 spin_unlock_irqrestore(&kptllnd_data. \
797 kptl_sched_lock, flags);
802 spin_lock_irqsave(&kptllnd_data.kptl_sched_lock,
807 if (++counter != *kptllnd_tunables.kptl_reschedule_loops)
811 set_current_state(TASK_INTERRUPTIBLE);
812 add_wait_queue_exclusive(&kptllnd_data.kptl_sched_waitq,
814 spin_unlock_irqrestore(&kptllnd_data.kptl_sched_lock,
818 waitq_wait(&waitlink, TASK_INTERRUPTIBLE);
822 set_current_state(TASK_RUNNING);
823 remove_wait_queue(&kptllnd_data.kptl_sched_waitq, &waitlink);
825 spin_lock_irqsave(&kptllnd_data.kptl_sched_lock, flags);
830 spin_unlock_irqrestore(&kptllnd_data.kptl_sched_lock, flags);
832 kptllnd_thread_fini();