2 *------------------------------------------------------------------
3 * svm.c - shared VM allocation, mmap(...MAP_FIXED...)
6 * Copyright (c) 2009 Cisco and/or its affiliates.
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at:
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 *------------------------------------------------------------------
23 #include <sys/types.h>
26 #include <netinet/in.h>
33 #include <vppinfra/clib.h>
34 #include <vppinfra/vec.h>
35 #include <vppinfra/hash.h>
36 #include <vppinfra/bitmap.h>
37 #include <vppinfra/fifo.h>
38 #include <vppinfra/time.h>
39 #include <vppinfra/mheap.h>
40 #include <vppinfra/heap.h>
41 #include <vppinfra/pool.h>
42 #include <vppinfra/format.h>
46 static svm_region_t *root_rp;
47 static int root_rp_refcount;
50 static pthread_mutex_t *mutexes_held [MAXLOCK];
53 svm_region_t *svm_get_root_rp (void)
60 static void region_lock(svm_region_t *rp, int tag)
62 pthread_mutex_lock(&rp->mutex);
64 rp->mutex_owner_pid = getpid();
65 rp->mutex_owner_tag = tag;
67 ASSERT(nheld < MAXLOCK);
69 * Keep score of held mutexes so we can try to exit
70 * cleanly if the world comes to an end at the worst possible
73 mutexes_held [nheld++] = &rp->mutex;
76 static void region_unlock(svm_region_t *rp)
80 rp->mutex_owner_pid = 0;
81 rp->mutex_owner_tag = 0;
84 for (i = nheld-1; i >= 0; i--) {
85 if (mutexes_held[i] == &rp->mutex) {
86 for (j = i; j < MAXLOCK-1; j++)
87 mutexes_held[j] = mutexes_held[j+1];
95 CLIB_MEMORY_BARRIER();
96 pthread_mutex_unlock(&rp->mutex);
100 static u8 * format_svm_flags (u8 * s, va_list * args)
102 uword f = va_arg (*args, uword);
104 if (f & SVM_FLAGS_MHEAP)
105 s = format (s, "MHEAP ");
106 if (f & SVM_FLAGS_FILE)
107 s = format (s, "FILE ");
108 if (f & SVM_FLAGS_NODATA)
109 s = format (s, "NODATA ");
110 if (f & SVM_FLAGS_NEED_DATA_INIT)
111 s = format (s, "INIT ");
116 static u8 * format_svm_size (u8 * s, va_list * args)
118 uword size = va_arg (*args, uword);
120 if (size >= (1<<20)) {
121 s = format (s, "(%d mb)", size >> 20);
122 } else if (size >= (1<<10)) {
123 s = format (s, "(%d kb)", size >> 10);
125 s = format (s, "(%d bytes)", size);
130 u8 * format_svm_region (u8 * s, va_list * args)
132 svm_region_t *rp = va_arg (*args, svm_region_t *);
133 int verbose = va_arg (*args, int);
137 s = format (s, "%s: base va 0x%x size 0x%x %U\n",
138 rp->region_name, rp->virtual_base,
139 rp->virtual_size, format_svm_size, rp->virtual_size);
140 s = format (s, " user_ctx 0x%x, bitmap_size %d\n",
141 rp->user_ctx, rp->bitmap_size);
144 s = format (s, " flags: 0x%x %U\n", rp->flags,
145 format_svm_flags, rp->flags);
147 " region_heap 0x%x data_base 0x%x data_heap 0x%x\n",
148 rp->region_heap, rp->data_base, rp->data_heap);
151 s = format (s, " %d clients, pids: ",
152 vec_len(rp->client_pids));
154 for (i = 0; i < vec_len(rp->client_pids); i++)
155 s = format (s, "%d ", rp->client_pids[i]);
157 s = format (s, "\n");
162 s = format (s, " VM in use: ");
164 for (i = 0; i < rp->bitmap_size; i++) {
165 if (clib_bitmap_get_no_check (rp->bitmap, i) != 0) {
167 hi = lo = rp->virtual_base + i*MMAP_PAGESIZE;
169 hi = rp->virtual_base + i*MMAP_PAGESIZE;
173 hi = rp->virtual_base + i*MMAP_PAGESIZE -1;
174 s = format (s, " 0x%x - 0x%x (%dk)\n", lo, hi,
180 s = format (s, " rgn heap stats: %U", format_mheap,
182 if ((rp->flags & SVM_FLAGS_MHEAP) && rp->data_heap) {
183 s = format (s, "\n data heap stats: %U", format_mheap,
186 s = format (s, "\n");
194 * Round to a pagesize multiple, presumably 4k works
196 static unsigned int rnd_pagesize(unsigned int size)
200 rv = (size + (MMAP_PAGESIZE-1)) & ~(MMAP_PAGESIZE-1);
205 * svm_data_region_setup
207 static int svm_data_region_create (svm_map_region_args_t *a,
214 map_size = rp->virtual_size - (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE);
216 if (a->flags & SVM_FLAGS_FILE) {
219 fd = open (a->backing_file, O_RDWR | O_CREAT, 0777);
222 clib_unix_warning ("open");
226 if (fstat(fd, &statb) < 0) {
227 clib_unix_warning("fstat");
232 if (statb.st_mode & S_IFREG) {
233 if (statb.st_size == 0) {
234 if (lseek(fd, map_size, SEEK_SET) == (off_t) -1) {
235 clib_unix_warning ("seek region size");
239 if (write(fd, &junk, 1) != 1) {
240 clib_unix_warning ("set region size");
245 map_size = rnd_pagesize (statb.st_size);
248 map_size = a->backing_mmap_size;
251 ASSERT(map_size <= rp->virtual_size -
252 (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE));
254 if (mmap (rp->data_base, map_size, PROT_READ | PROT_WRITE,
255 MAP_SHARED | MAP_FIXED, fd, 0) == MAP_FAILED) {
256 clib_unix_warning("mmap");
261 rp->backing_file = (char *) format(0, "%s\0", a->backing_file);
262 rp->flags |= SVM_FLAGS_FILE;
265 if (a->flags & SVM_FLAGS_MHEAP) {
267 mheap_alloc_with_flags ((void *)(rp->data_base), map_size,
268 MHEAP_FLAG_DISABLE_VM);
269 rp->flags |= SVM_FLAGS_MHEAP;
274 static int svm_data_region_map (svm_map_region_args_t *a,
282 map_size = rp->virtual_size - (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE);
284 if (a->flags & SVM_FLAGS_FILE) {
286 fd = open (a->backing_file, O_RDWR, 0777);
289 clib_unix_warning ("open");
293 if (fstat(fd, &statb) < 0) {
294 clib_unix_warning("fstat");
299 if (statb.st_mode & S_IFREG) {
300 if (statb.st_size == 0) {
301 if (lseek(fd, map_size, SEEK_SET) == (off_t) -1) {
302 clib_unix_warning ("seek region size");
306 if (write(fd, &junk, 1) != 1) {
307 clib_unix_warning ("set region size");
312 map_size = rnd_pagesize (statb.st_size);
315 map_size = a->backing_mmap_size;
318 ASSERT(map_size <= rp->virtual_size
319 - (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE));
321 if (mmap (rp->data_base, map_size, PROT_READ | PROT_WRITE,
322 MAP_SHARED | MAP_FIXED, fd, 0) == MAP_FAILED) {
323 clib_unix_warning("mmap");
332 u8 *shm_name_from_svm_map_region_args (svm_map_region_args_t *a)
338 int root_path_offset = 0;
342 /* Tolerate present or absent slashes */
343 if (a->root_path[0] == '/')
346 /* create the root_path under /dev/shm
347 iterate through path creating directories */
349 path = format (0, "/dev/shm/%s%c", &a->root_path[root_path_offset], 0);
350 split_point = path+1;
351 vec_add1(mkdir_arg, '-');
353 while (*split_point) {
354 while (*split_point && *split_point != '/') {
355 vec_add1 (mkdir_arg, *split_point);
358 vec_add1 (mkdir_arg, 0);
360 /* ready to descend another level */
361 mkdir_arg[vec_len(mkdir_arg)-1] = '-';
367 if (a->name[0] == '/')
370 shm_name = format (0, "/%s-%s%c", a->root_path,
371 &a->name[name_offset], 0);
374 shm_name = format (0, "%s%c", a->name, 0);
381 void *svm_map_region (svm_map_region_args_t *a)
385 pthread_mutexattr_t attr;
386 pthread_condattr_t cattr;
393 int nbits, words, bit;
394 int pid_holding_region_lock;
396 int dead_region_recovery = 0;
399 struct timespec ts, tsrem;
402 clib_warning ("[%d] map region %s", getpid(), a->name);
404 ASSERT((a->size & ~(MMAP_PAGESIZE-1)) == a->size);
407 shm_name = shm_name_from_svm_map_region_args (a);
409 svm_fd = shm_open((char *) shm_name, O_RDWR | O_CREAT | O_EXCL, 0777);
412 if (fchmod (svm_fd, 0770) < 0)
413 clib_unix_warning ("segment chmod");
414 /* This turns out to fail harmlessly if the client starts first */
415 if (fchown (svm_fd, a->uid, a->gid) < 0)
416 clib_unix_warning ("segment chown [ok if client starts first]");
420 if (lseek(svm_fd, a->size, SEEK_SET) == (off_t) -1) {
421 clib_warning ("seek region size");
425 if (write(svm_fd, &junk, 1) != 1) {
426 clib_warning ("set region size");
431 rp = mmap((void *)a->baseva, a->size,
432 PROT_READ | PROT_WRITE, MAP_SHARED | MAP_FIXED, svm_fd, 0);
434 if (rp == (svm_region_t *) MAP_FAILED) {
435 clib_unix_warning ("mmap create");
440 memset(rp, 0, sizeof(*rp));
442 if (pthread_mutexattr_init(&attr))
443 clib_unix_warning("mutexattr_init");
445 if (pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_SHARED))
446 clib_unix_warning("mutexattr_setpshared");
448 if (pthread_mutex_init(&rp->mutex, &attr))
449 clib_unix_warning("mutex_init");
451 if (pthread_mutexattr_destroy(&attr))
452 clib_unix_warning("mutexattr_destroy");
454 if (pthread_condattr_init(&cattr))
455 clib_unix_warning("condattr_init");
457 if (pthread_condattr_setpshared(&cattr, PTHREAD_PROCESS_SHARED))
458 clib_unix_warning("condattr_setpshared");
460 if (pthread_cond_init(&rp->condvar, &cattr))
461 clib_unix_warning("cond_init");
463 if(pthread_condattr_destroy(&cattr))
464 clib_unix_warning("condattr_destroy");
468 rp->virtual_base = a->baseva;
469 rp->virtual_size = a->size;
472 mheap_alloc_with_flags ((void *)(a->baseva+MMAP_PAGESIZE),
474 MHEAP_FLAG_DISABLE_VM);
475 oldheap = svm_push_pvt_heap(rp);
477 rp->region_name = (char *)format (0, "%s%c", a->name, 0);
478 vec_add1(rp->client_pids, getpid());
480 nbits = rp->virtual_size / MMAP_PAGESIZE;
483 rp->bitmap_size = nbits;
484 words = (nbits + BITS(uword)-1) / BITS(uword);
485 vec_validate (rp->bitmap, words-1);
487 overhead_space = MMAP_PAGESIZE /* header */ +
491 data_base = (uword)rp->virtual_base;
493 if (a->flags & SVM_FLAGS_NODATA)
494 rp->flags |= SVM_FLAGS_NEED_DATA_INIT;
497 clib_bitmap_set_no_check (rp->bitmap, bit, 1);
499 overhead_space -= MMAP_PAGESIZE;
500 data_base += MMAP_PAGESIZE;
501 } while (overhead_space > 0);
503 rp->data_base = (void *)data_base;
506 * Note: although the POSIX spec guarantees that only one
507 * process enters this block, we have to play games
508 * to hold off clients until e.g. the mutex is ready
510 rp->version = SVM_VERSION;
512 /* setup the data portion of the region */
514 rv = svm_data_region_create (a, rp);
516 clib_warning ("data_region_create: %d", rv);
521 svm_pop_heap(oldheap);
523 return ((void *) rp);
525 svm_fd = shm_open((char *)shm_name, O_RDWR, 0777);
530 perror("svm_region_map(mmap open)");
536 if (0 != fstat(svm_fd, &stat)) {
537 clib_warning("fstat failed: %d", errno);
541 if (stat.st_size > 0) {
544 if (0 == time_left) {
545 clib_warning("waiting for resize of shm file timed out");
550 ts.tv_nsec = 100000000;
551 while (nanosleep(&ts, &tsrem) < 0)
556 rp = mmap(0, MMAP_PAGESIZE,
557 PROT_READ | PROT_WRITE, MAP_SHARED, svm_fd, 0);
559 if (rp == (svm_region_t *) MAP_FAILED) {
561 clib_warning("mmap");
565 * We lost the footrace to create this region; make sure
566 * the winner has crossed the finish line.
568 while (rp->version == 0 && deadman++ < 5) {
575 if (rp->version == 0) {
576 clib_warning("rp->version %d not %d", rp->version,
582 /* Remap now that the region has been placed */
583 a->baseva = rp->virtual_base;
584 a->size = rp->virtual_size;
585 munmap(rp, MMAP_PAGESIZE);
587 rp = (void *) mmap ((void *)a->baseva, a->size,
588 PROT_READ | PROT_WRITE,
589 MAP_SHARED | MAP_FIXED, svm_fd, 0);
590 if ((uword)rp == (uword)MAP_FAILED) {
591 clib_unix_warning ("mmap");
596 if ((uword) rp != rp->virtual_base) {
597 clib_warning("mmap botch");
601 * Try to fix the region mutex if it is held by
604 pid_holding_region_lock = rp->mutex_owner_pid;
605 if (pid_holding_region_lock &&
606 kill (pid_holding_region_lock, 0) < 0) {
608 "region %s mutex held by dead pid %d, tag %d, force unlock",
609 rp->region_name, pid_holding_region_lock, rp->mutex_owner_tag);
610 /* owner pid is nonexistent */
611 rp->mutex.__data.__owner = 0;
612 rp->mutex.__data.__lock = 0;
613 dead_region_recovery = 1;
616 if (dead_region_recovery)
617 clib_warning ("recovery: attempt to re-lock region");
620 oldheap = svm_push_pvt_heap (rp);
621 vec_add1(rp->client_pids, getpid());
623 if (dead_region_recovery)
624 clib_warning ("recovery: attempt svm_data_region_map");
626 rv = svm_data_region_map (a, rp);
628 clib_warning ("data_region_map: %d", rv);
631 if (dead_region_recovery)
632 clib_warning ("unlock and continue");
636 svm_pop_heap(oldheap);
638 return ((void *) rp);
641 return 0; /* NOTREACHED */
644 static void svm_mutex_cleanup (void)
647 for (i = 0; i < nheld; i++) {
648 pthread_mutex_unlock (mutexes_held[i]);
652 static void svm_region_init_internal (char *root_path, int uid, int gid)
655 svm_map_region_args_t _a, *a=&_a;
656 u64 ticks = clib_cpu_time_now();
657 uword randomize_baseva;
659 /* guard against klutz calls */
665 atexit(svm_mutex_cleanup);
667 /* Randomize the shared-VM base at init time */
668 if (MMAP_PAGESIZE <= (4<<10))
669 randomize_baseva = (ticks & 15) * MMAP_PAGESIZE;
671 randomize_baseva = (ticks & 3) * MMAP_PAGESIZE;
673 memset (a, 0, sizeof (*a));
674 a->root_path = root_path;
675 a->name = SVM_GLOBAL_REGION_NAME;
676 a->baseva = SVM_GLOBAL_REGION_BASEVA + randomize_baseva;
677 a->size = SVM_GLOBAL_REGION_SIZE;
678 a->flags = SVM_FLAGS_NODATA;
682 rp = svm_map_region (a);
687 /* Set up the main region data structures */
688 if (rp->flags & SVM_FLAGS_NEED_DATA_INIT) {
689 svm_main_region_t *mp = 0;
692 rp->flags &= ~(SVM_FLAGS_NEED_DATA_INIT);
694 oldheap = svm_push_pvt_heap (rp);
695 vec_validate (mp, 0);
696 mp->name_hash = hash_create_string (0, sizeof(uword));
697 mp->root_path = root_path
698 ? format (0, "%s%c", root_path, 0) : 0 ;
700 svm_pop_heap (oldheap);
706 void svm_region_init (void)
708 svm_region_init_internal (0, 0 /* uid */, 0 /* gid */);
711 void svm_region_init_chroot (char *root_path)
713 svm_region_init_internal (root_path, 0 /* uid */, 0 /* gid */);
716 void svm_region_init_chroot_uid_gid (char *root_path, int uid, int gid)
718 svm_region_init_internal (root_path, uid, gid);
721 void *svm_region_find_or_create (svm_map_region_args_t *a)
723 svm_main_region_t *mp;
730 svm_subregion_t *subp;
734 a->size += MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE;
735 a->size = rnd_pagesize(a->size);
737 region_lock (root_rp, 4);
738 oldheap = svm_push_pvt_heap(root_rp);
739 mp = root_rp->data_base;
743 /* Map the named region from the correct chroot environment */
744 a->root_path = (char *) mp->root_path;
747 * See if this region is already known. If it is, we're
750 p = hash_get_mem (mp->name_hash, a->name);
753 rp = svm_map_region (a);
754 region_unlock(root_rp);
755 svm_pop_heap (oldheap);
759 /* Create the region. */
760 ASSERT((a->size & ~(MMAP_PAGESIZE-1)) == a->size);
762 need_nbits = a->size / MMAP_PAGESIZE;
764 index = 1; /* $$$ fixme, figure out how many bit to really skip */
767 * Scan the virtual space allocation bitmap, looking for a large
771 if (clib_bitmap_get_no_check(root_rp->bitmap, index) == 0) {
772 for (i = 0; i < (need_nbits-1); i++) {
773 if (clib_bitmap_get_no_check(root_rp->bitmap,
783 } while (index < root_rp->bitmap_size);
785 /* Completely out of VM? */
786 if (index >= root_rp->bitmap_size) {
787 clib_warning("region %s: not enough VM to allocate 0x%x",
788 root_rp->region_name, a->size);
789 svm_pop_heap (oldheap);
790 region_unlock (root_rp);
795 * Mark virtual space allocated
798 clib_warning ("set %d bits at index %d", need_nbits, index);
801 for (i = 0; i < need_nbits; i++) {
802 clib_bitmap_set_no_check (root_rp->bitmap, index+i, 1);
805 /* Place this region where it goes... */
806 a->baseva = root_rp->virtual_base + index*MMAP_PAGESIZE;
808 rp = svm_map_region (a);
810 pool_get (mp->subregions, subp);
811 name = format (0, "%s%c", a->name, 0);
812 subp->subregion_name = name;
814 hash_set_mem (mp->name_hash, name, subp - mp->subregions);
816 svm_pop_heap (oldheap);
818 region_unlock (root_rp);
826 * Let go of the indicated region. If the calling process
827 * is the last customer, throw it away completely.
828 * The root region mutex guarantees atomicity with respect to
829 * a new region client showing up at the wrong moment.
831 void svm_region_unmap (void *rp_arg)
833 int i, mypid = getpid();
836 uword virtual_base, virtual_size;
837 svm_region_t *rp = rp_arg;
841 * If we take a signal while holding one or more shared-memory
842 * mutexes, we may end up back here from an otherwise
843 * benign exit handler. Bail out to avoid a recursive
853 clib_warning ("[%d] unmap region %s", getpid(), rp->region_name);
855 region_lock (root_rp, 5);
858 oldheap = svm_push_pvt_heap (rp); /* nb vec_delete() in the loop */
860 /* Remove the caller from the list of mappers */
861 for (i = 0; i < vec_len(rp->client_pids); i++) {
862 if (rp->client_pids[i] == mypid) {
863 vec_delete (rp->client_pids, 1, i);
867 clib_warning("pid %d AWOL", mypid);
871 svm_pop_heap (oldheap);
873 nclients_left = vec_len(rp->client_pids);
874 virtual_base = rp->virtual_base;
875 virtual_size = rp->virtual_size;
877 if (nclients_left == 0) {
879 svm_main_region_t *mp;
881 svm_subregion_t *subp;
883 /* Kill the region, last guy on his way out */
885 oldheap = svm_push_pvt_heap (root_rp);
886 name = vec_dup (rp->region_name);
888 virtual_base = rp->virtual_base;
889 virtual_size = rp->virtual_size;
891 /* Figure out which bits to clear in the root region bitmap */
892 index = (virtual_base - root_rp->virtual_base)
895 nbits = (virtual_size + MMAP_PAGESIZE - 1)
899 clib_warning ("clear %d bits at index %d", nbits, index);
901 /* Give back the allocated VM */
902 for (i = 0; i < nbits; i++) {
903 clib_bitmap_set_no_check (root_rp->bitmap, index+i, 0);
906 mp = root_rp->data_base;
908 p = hash_get_mem (mp->name_hash, name);
910 /* Better never happen ... */
913 region_unlock (root_rp);
914 svm_pop_heap (oldheap);
915 clib_warning ("Region name '%s' not found?", name);
919 /* Remove from the root region subregion pool */
920 subp = mp->subregions + p[0];
921 pool_put (mp->subregions, subp);
923 hash_unset_mem (mp->name_hash, name);
928 shm_unlink(rp->region_name);
929 munmap ((void *)virtual_base, virtual_size);
930 region_unlock (root_rp);
931 svm_pop_heap (oldheap);
936 region_unlock(root_rp);
938 munmap ((void *)virtual_base, virtual_size);
943 * There is no clean way to unlink the
944 * root region when all clients go away,
945 * so remove the pid entry and call it a day.
947 void svm_region_exit ()
950 int i, mypid = getpid();
951 uword virtual_base, virtual_size;
953 /* It felt so nice we did it twice... */
957 if (--root_rp_refcount > 0)
961 * If we take a signal while holding one or more shared-memory
962 * mutexes, we may end up back here from an otherwise
963 * benign exit handler. Bail out to avoid a recursive
969 region_lock(root_rp, 7);
970 oldheap = svm_push_pvt_heap (root_rp);
972 virtual_base = root_rp->virtual_base;
973 virtual_size = root_rp->virtual_size;
975 for (i = 0; i < vec_len(root_rp->client_pids); i++) {
976 if (root_rp->client_pids[i] == mypid) {
977 vec_delete (root_rp->client_pids, 1, i);
981 clib_warning("pid %d AWOL", mypid);
985 region_unlock(root_rp);
986 svm_pop_heap (oldheap);
989 munmap ((void *)virtual_base, virtual_size);
992 void svm_client_scan_this_region_nolock (svm_region_t *rp)
995 int mypid = getpid();
998 for (j = 0; j < vec_len(rp->client_pids); j++) {
999 if (mypid == rp->client_pids[j])
1001 if (rp->client_pids[j] && (kill (rp->client_pids[j], 0) < 0)) {
1002 clib_warning ("%s: cleanup ghost pid %d",
1003 rp->region_name, rp->client_pids[j]);
1004 /* nb: client vec in rp->region_heap */
1005 oldheap = svm_push_pvt_heap (rp);
1006 vec_delete (rp->client_pids, 1, j);
1008 svm_pop_heap (oldheap);
1015 * Scan svm regions for dead clients
1017 void svm_client_scan(char *root_path)
1020 svm_main_region_t *mp;
1021 svm_map_region_args_t *a = 0;
1022 svm_region_t *root_rp;
1024 svm_subregion_t *subp;
1028 int mypid = getpid();
1030 vec_validate (a, 0);
1032 svm_region_init_chroot(root_path);
1034 root_rp = svm_get_root_rp();
1036 pthread_mutex_lock (&root_rp->mutex);
1038 mp = root_rp->data_base;
1040 for (j = 0; j < vec_len (root_rp->client_pids); j++) {
1041 if (mypid == root_rp->client_pids[j])
1043 if (root_rp->client_pids[j]
1044 && (kill (root_rp->client_pids[j], 0) < 0)) {
1045 clib_warning ("%s: cleanup ghost pid %d",
1046 root_rp->region_name, root_rp->client_pids[j]);
1047 /* nb: client vec in root_rp->region_heap */
1048 oldheap = svm_push_pvt_heap (root_rp);
1049 vec_delete (root_rp->client_pids, 1, j);
1051 svm_pop_heap (oldheap);
1056 * Snapshoot names, can't hold root rp mutex across
1059 pool_foreach (subp, mp->subregions, ({
1060 name = vec_dup (subp->subregion_name);
1061 vec_add1(svm_names, name);
1064 pthread_mutex_unlock (&root_rp->mutex);
1066 for (i = 0; i < vec_len(svm_names); i++) {
1068 a->root_path = root_path;
1069 a->name = (char *) svm_names[i];
1070 rp = svm_region_find_or_create (a);
1072 pthread_mutex_lock (&rp->mutex);
1074 svm_client_scan_this_region_nolock (rp);
1076 pthread_mutex_unlock (&rp->mutex);
1077 svm_region_unmap (rp);
1078 vec_free(svm_names[i]);
1082 vec_free(svm_names);