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];
54 svm_get_root_rp (void)
62 region_lock (svm_region_t * rp, int tag)
64 pthread_mutex_lock (&rp->mutex);
66 rp->mutex_owner_pid = getpid ();
67 rp->mutex_owner_tag = tag;
69 ASSERT (nheld < MAXLOCK);
71 * Keep score of held mutexes so we can try to exit
72 * cleanly if the world comes to an end at the worst possible
75 mutexes_held[nheld++] = &rp->mutex;
79 region_unlock (svm_region_t * rp)
83 rp->mutex_owner_pid = 0;
84 rp->mutex_owner_tag = 0;
87 for (i = nheld - 1; i >= 0; i--)
89 if (mutexes_held[i] == &rp->mutex)
91 for (j = i; j < MAXLOCK - 1; j++)
92 mutexes_held[j] = mutexes_held[j + 1];
100 CLIB_MEMORY_BARRIER ();
101 pthread_mutex_unlock (&rp->mutex);
106 format_svm_flags (u8 * s, va_list * args)
108 uword f = va_arg (*args, uword);
110 if (f & SVM_FLAGS_MHEAP)
111 s = format (s, "MHEAP ");
112 if (f & SVM_FLAGS_FILE)
113 s = format (s, "FILE ");
114 if (f & SVM_FLAGS_NODATA)
115 s = format (s, "NODATA ");
116 if (f & SVM_FLAGS_NEED_DATA_INIT)
117 s = format (s, "INIT ");
123 format_svm_size (u8 * s, va_list * args)
125 uword size = va_arg (*args, uword);
127 if (size >= (1 << 20))
129 s = format (s, "(%d mb)", size >> 20);
131 else if (size >= (1 << 10))
133 s = format (s, "(%d kb)", size >> 10);
137 s = format (s, "(%d bytes)", size);
143 format_svm_region (u8 * s, va_list * args)
145 svm_region_t *rp = va_arg (*args, svm_region_t *);
146 int verbose = va_arg (*args, int);
150 s = format (s, "%s: base va 0x%x size 0x%x %U\n",
151 rp->region_name, rp->virtual_base,
152 rp->virtual_size, format_svm_size, rp->virtual_size);
153 s = format (s, " user_ctx 0x%x, bitmap_size %d\n",
154 rp->user_ctx, rp->bitmap_size);
158 s = format (s, " flags: 0x%x %U\n", rp->flags,
159 format_svm_flags, rp->flags);
161 " region_heap 0x%x data_base 0x%x data_heap 0x%x\n",
162 rp->region_heap, rp->data_base, rp->data_heap);
165 s = format (s, " %d clients, pids: ", vec_len (rp->client_pids));
167 for (i = 0; i < vec_len (rp->client_pids); i++)
168 s = format (s, "%d ", rp->client_pids[i]);
170 s = format (s, "\n");
176 s = format (s, " VM in use: ");
178 for (i = 0; i < rp->bitmap_size; i++)
180 if (clib_bitmap_get_no_check (rp->bitmap, i) != 0)
184 hi = lo = rp->virtual_base + i * MMAP_PAGESIZE;
188 hi = rp->virtual_base + i * MMAP_PAGESIZE;
195 hi = rp->virtual_base + i * MMAP_PAGESIZE - 1;
196 s = format (s, " 0x%x - 0x%x (%dk)\n", lo, hi,
202 s = format (s, " rgn heap stats: %U", format_mheap,
204 if ((rp->flags & SVM_FLAGS_MHEAP) && rp->data_heap)
206 s = format (s, "\n data heap stats: %U", format_mheap,
209 s = format (s, "\n");
217 * Round to a pagesize multiple, presumably 4k works
220 rnd_pagesize (unsigned int size)
224 rv = (size + (MMAP_PAGESIZE - 1)) & ~(MMAP_PAGESIZE - 1);
229 * svm_data_region_setup
232 svm_data_region_create (svm_map_region_args_t * a, svm_region_t * rp)
238 map_size = rp->virtual_size - (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE);
240 if (a->flags & SVM_FLAGS_FILE)
244 fd = open (a->backing_file, O_RDWR | O_CREAT, 0777);
248 clib_unix_warning ("open");
252 if (fstat (fd, &statb) < 0)
254 clib_unix_warning ("fstat");
259 if (statb.st_mode & S_IFREG)
261 if (statb.st_size == 0)
263 if (lseek (fd, map_size, SEEK_SET) == (off_t) - 1)
265 clib_unix_warning ("seek region size");
269 if (write (fd, &junk, 1) != 1)
271 clib_unix_warning ("set region size");
278 map_size = rnd_pagesize (statb.st_size);
283 map_size = a->backing_mmap_size;
286 ASSERT (map_size <= rp->virtual_size -
287 (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE));
289 if (mmap (rp->data_base, map_size, PROT_READ | PROT_WRITE,
290 MAP_SHARED | MAP_FIXED, fd, 0) == MAP_FAILED)
292 clib_unix_warning ("mmap");
297 rp->backing_file = (char *) format (0, "%s\0", a->backing_file);
298 rp->flags |= SVM_FLAGS_FILE;
301 if (a->flags & SVM_FLAGS_MHEAP)
304 mheap_alloc_with_flags ((void *) (rp->data_base), map_size,
305 MHEAP_FLAG_DISABLE_VM);
306 rp->flags |= SVM_FLAGS_MHEAP;
312 svm_data_region_map (svm_map_region_args_t * a, svm_region_t * rp)
319 map_size = rp->virtual_size - (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE);
321 if (a->flags & SVM_FLAGS_FILE)
324 fd = open (a->backing_file, O_RDWR, 0777);
328 clib_unix_warning ("open");
332 if (fstat (fd, &statb) < 0)
334 clib_unix_warning ("fstat");
339 if (statb.st_mode & S_IFREG)
341 if (statb.st_size == 0)
343 if (lseek (fd, map_size, SEEK_SET) == (off_t) - 1)
345 clib_unix_warning ("seek region size");
349 if (write (fd, &junk, 1) != 1)
351 clib_unix_warning ("set region size");
358 map_size = rnd_pagesize (statb.st_size);
363 map_size = a->backing_mmap_size;
366 ASSERT (map_size <= rp->virtual_size
367 - (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE));
369 if (mmap (rp->data_base, map_size, PROT_READ | PROT_WRITE,
370 MAP_SHARED | MAP_FIXED, fd, 0) == MAP_FAILED)
372 clib_unix_warning ("mmap");
382 shm_name_from_svm_map_region_args (svm_map_region_args_t * a)
388 int root_path_offset = 0;
393 /* Tolerate present or absent slashes */
394 if (a->root_path[0] == '/')
397 /* create the root_path under /dev/shm
398 iterate through path creating directories */
400 path = format (0, "/dev/shm/%s%c", &a->root_path[root_path_offset], 0);
401 split_point = path + 1;
402 vec_add1 (mkdir_arg, '-');
406 while (*split_point && *split_point != '/')
408 vec_add1 (mkdir_arg, *split_point);
411 vec_add1 (mkdir_arg, 0);
413 /* ready to descend another level */
414 mkdir_arg[vec_len (mkdir_arg) - 1] = '-';
417 vec_free (mkdir_arg);
420 if (a->name[0] == '/')
423 shm_name = format (0, "/%s-%s%c", a->root_path,
424 &a->name[name_offset], 0);
427 shm_name = format (0, "%s%c", a->name, 0);
435 svm_map_region (svm_map_region_args_t * a)
439 pthread_mutexattr_t attr;
440 pthread_condattr_t cattr;
447 int nbits, words, bit;
448 int pid_holding_region_lock;
450 int dead_region_recovery = 0;
453 struct timespec ts, tsrem;
456 clib_warning ("[%d] map region %s", getpid (), a->name);
458 ASSERT ((a->size & ~(MMAP_PAGESIZE - 1)) == a->size);
461 shm_name = shm_name_from_svm_map_region_args (a);
463 svm_fd = shm_open ((char *) shm_name, O_RDWR | O_CREAT | O_EXCL, 0777);
467 if (fchmod (svm_fd, 0770) < 0)
468 clib_unix_warning ("segment chmod");
469 /* This turns out to fail harmlessly if the client starts first */
470 if (fchown (svm_fd, a->uid, a->gid) < 0)
471 clib_unix_warning ("segment chown [ok if client starts first]");
475 if (lseek (svm_fd, a->size, SEEK_SET) == (off_t) - 1)
477 clib_warning ("seek region size");
481 if (write (svm_fd, &junk, 1) != 1)
483 clib_warning ("set region size");
488 rp = mmap ((void *) a->baseva, a->size,
489 PROT_READ | PROT_WRITE, MAP_SHARED | MAP_FIXED, svm_fd, 0);
491 if (rp == (svm_region_t *) MAP_FAILED)
493 clib_unix_warning ("mmap create");
498 memset (rp, 0, sizeof (*rp));
500 if (pthread_mutexattr_init (&attr))
501 clib_unix_warning ("mutexattr_init");
503 if (pthread_mutexattr_setpshared (&attr, PTHREAD_PROCESS_SHARED))
504 clib_unix_warning ("mutexattr_setpshared");
506 if (pthread_mutex_init (&rp->mutex, &attr))
507 clib_unix_warning ("mutex_init");
509 if (pthread_mutexattr_destroy (&attr))
510 clib_unix_warning ("mutexattr_destroy");
512 if (pthread_condattr_init (&cattr))
513 clib_unix_warning ("condattr_init");
515 if (pthread_condattr_setpshared (&cattr, PTHREAD_PROCESS_SHARED))
516 clib_unix_warning ("condattr_setpshared");
518 if (pthread_cond_init (&rp->condvar, &cattr))
519 clib_unix_warning ("cond_init");
521 if (pthread_condattr_destroy (&cattr))
522 clib_unix_warning ("condattr_destroy");
526 rp->virtual_base = a->baseva;
527 rp->virtual_size = a->size;
530 mheap_alloc_with_flags ((void *) (a->baseva + MMAP_PAGESIZE),
531 SVM_PVT_MHEAP_SIZE, MHEAP_FLAG_DISABLE_VM);
532 oldheap = svm_push_pvt_heap (rp);
534 rp->region_name = (char *) format (0, "%s%c", a->name, 0);
535 vec_add1 (rp->client_pids, getpid ());
537 nbits = rp->virtual_size / MMAP_PAGESIZE;
540 rp->bitmap_size = nbits;
541 words = (nbits + BITS (uword) - 1) / BITS (uword);
542 vec_validate (rp->bitmap, words - 1);
544 overhead_space = MMAP_PAGESIZE /* header */ +
548 data_base = (uword) rp->virtual_base;
550 if (a->flags & SVM_FLAGS_NODATA)
551 rp->flags |= SVM_FLAGS_NEED_DATA_INIT;
555 clib_bitmap_set_no_check (rp->bitmap, bit, 1);
557 overhead_space -= MMAP_PAGESIZE;
558 data_base += MMAP_PAGESIZE;
560 while (overhead_space > 0);
562 rp->data_base = (void *) data_base;
565 * Note: although the POSIX spec guarantees that only one
566 * process enters this block, we have to play games
567 * to hold off clients until e.g. the mutex is ready
569 rp->version = SVM_VERSION;
571 /* setup the data portion of the region */
573 rv = svm_data_region_create (a, rp);
576 clib_warning ("data_region_create: %d", rv);
581 svm_pop_heap (oldheap);
583 return ((void *) rp);
587 svm_fd = shm_open ((char *) shm_name, O_RDWR, 0777);
593 perror ("svm_region_map(mmap open)");
600 if (0 != fstat (svm_fd, &stat))
602 clib_warning ("fstat failed: %d", errno);
606 if (stat.st_size > 0)
612 clib_warning ("waiting for resize of shm file timed out");
617 ts.tv_nsec = 100000000;
618 while (nanosleep (&ts, &tsrem) < 0)
623 rp = mmap (0, MMAP_PAGESIZE,
624 PROT_READ | PROT_WRITE, MAP_SHARED, svm_fd, 0);
626 if (rp == (svm_region_t *) MAP_FAILED)
629 clib_warning ("mmap");
633 * We lost the footrace to create this region; make sure
634 * the winner has crossed the finish line.
636 while (rp->version == 0 && deadman++ < 5)
644 if (rp->version == 0)
646 clib_warning ("rp->version %d not %d", rp->version, SVM_VERSION);
648 munmap (rp, a->size);
651 /* Remap now that the region has been placed */
652 a->baseva = rp->virtual_base;
653 a->size = rp->virtual_size;
654 munmap (rp, MMAP_PAGESIZE);
656 rp = (void *) mmap ((void *) a->baseva, a->size,
657 PROT_READ | PROT_WRITE,
658 MAP_SHARED | MAP_FIXED, svm_fd, 0);
659 if ((uword) rp == (uword) MAP_FAILED)
661 clib_unix_warning ("mmap");
666 if ((uword) rp != rp->virtual_base)
668 clib_warning ("mmap botch");
672 * Try to fix the region mutex if it is held by
675 pid_holding_region_lock = rp->mutex_owner_pid;
676 if (pid_holding_region_lock && kill (pid_holding_region_lock, 0) < 0)
679 ("region %s mutex held by dead pid %d, tag %d, force unlock",
680 rp->region_name, pid_holding_region_lock, rp->mutex_owner_tag);
681 /* owner pid is nonexistent */
682 rp->mutex.__data.__owner = 0;
683 rp->mutex.__data.__lock = 0;
684 dead_region_recovery = 1;
687 if (dead_region_recovery)
688 clib_warning ("recovery: attempt to re-lock region");
691 oldheap = svm_push_pvt_heap (rp);
692 vec_add1 (rp->client_pids, getpid ());
694 if (dead_region_recovery)
695 clib_warning ("recovery: attempt svm_data_region_map");
697 rv = svm_data_region_map (a, rp);
700 clib_warning ("data_region_map: %d", rv);
703 if (dead_region_recovery)
704 clib_warning ("unlock and continue");
708 svm_pop_heap (oldheap);
710 return ((void *) rp);
713 return 0; /* NOTREACHED */
717 svm_mutex_cleanup (void)
720 for (i = 0; i < nheld; i++)
722 pthread_mutex_unlock (mutexes_held[i]);
727 svm_region_init_internal (char *root_path, int uid, int gid)
730 svm_map_region_args_t _a, *a = &_a;
731 u64 ticks = clib_cpu_time_now ();
732 uword randomize_baseva;
734 /* guard against klutz calls */
740 atexit (svm_mutex_cleanup);
742 /* Randomize the shared-VM base at init time */
743 if (MMAP_PAGESIZE <= (4 << 10))
744 randomize_baseva = (ticks & 15) * MMAP_PAGESIZE;
746 randomize_baseva = (ticks & 3) * MMAP_PAGESIZE;
748 memset (a, 0, sizeof (*a));
749 a->root_path = root_path;
750 a->name = SVM_GLOBAL_REGION_NAME;
751 a->baseva = SVM_GLOBAL_REGION_BASEVA + randomize_baseva;
752 a->size = SVM_GLOBAL_REGION_SIZE;
753 a->flags = SVM_FLAGS_NODATA;
757 rp = svm_map_region (a);
762 /* Set up the main region data structures */
763 if (rp->flags & SVM_FLAGS_NEED_DATA_INIT)
765 svm_main_region_t *mp = 0;
768 rp->flags &= ~(SVM_FLAGS_NEED_DATA_INIT);
770 oldheap = svm_push_pvt_heap (rp);
771 vec_validate (mp, 0);
772 mp->name_hash = hash_create_string (0, sizeof (uword));
773 mp->root_path = root_path ? format (0, "%s%c", root_path, 0) : 0;
775 svm_pop_heap (oldheap);
782 svm_region_init (void)
784 svm_region_init_internal (0, 0 /* uid */ , 0 /* gid */ );
788 svm_region_init_chroot (char *root_path)
790 svm_region_init_internal (root_path, 0 /* uid */ , 0 /* gid */ );
794 svm_region_init_chroot_uid_gid (char *root_path, int uid, int gid)
796 svm_region_init_internal (root_path, uid, gid);
800 svm_region_find_or_create (svm_map_region_args_t * a)
802 svm_main_region_t *mp;
809 svm_subregion_t *subp;
813 a->size += MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE;
814 a->size = rnd_pagesize (a->size);
816 region_lock (root_rp, 4);
817 oldheap = svm_push_pvt_heap (root_rp);
818 mp = root_rp->data_base;
822 /* Map the named region from the correct chroot environment */
823 a->root_path = (char *) mp->root_path;
826 * See if this region is already known. If it is, we're
829 p = hash_get_mem (mp->name_hash, a->name);
833 rp = svm_map_region (a);
834 region_unlock (root_rp);
835 svm_pop_heap (oldheap);
839 /* Create the region. */
840 ASSERT ((a->size & ~(MMAP_PAGESIZE - 1)) == a->size);
842 need_nbits = a->size / MMAP_PAGESIZE;
844 index = 1; /* $$$ fixme, figure out how many bit to really skip */
847 * Scan the virtual space allocation bitmap, looking for a large
852 if (clib_bitmap_get_no_check (root_rp->bitmap, index) == 0)
854 for (i = 0; i < (need_nbits - 1); i++)
856 if (clib_bitmap_get_no_check (root_rp->bitmap, index + i) == 1)
867 while (index < root_rp->bitmap_size);
869 /* Completely out of VM? */
870 if (index >= root_rp->bitmap_size)
872 clib_warning ("region %s: not enough VM to allocate 0x%x",
873 root_rp->region_name, a->size);
874 svm_pop_heap (oldheap);
875 region_unlock (root_rp);
880 * Mark virtual space allocated
883 clib_warning ("set %d bits at index %d", need_nbits, index);
886 for (i = 0; i < need_nbits; i++)
888 clib_bitmap_set_no_check (root_rp->bitmap, index + i, 1);
891 /* Place this region where it goes... */
892 a->baseva = root_rp->virtual_base + index * MMAP_PAGESIZE;
894 rp = svm_map_region (a);
896 pool_get (mp->subregions, subp);
897 name = format (0, "%s%c", a->name, 0);
898 subp->subregion_name = name;
900 hash_set_mem (mp->name_hash, name, subp - mp->subregions);
902 svm_pop_heap (oldheap);
904 region_unlock (root_rp);
912 * Let go of the indicated region. If the calling process
913 * is the last customer, throw it away completely.
914 * The root region mutex guarantees atomicity with respect to
915 * a new region client showing up at the wrong moment.
918 svm_region_unmap (void *rp_arg)
920 int i, mypid = getpid ();
923 uword virtual_base, virtual_size;
924 svm_region_t *rp = rp_arg;
928 * If we take a signal while holding one or more shared-memory
929 * mutexes, we may end up back here from an otherwise
930 * benign exit handler. Bail out to avoid a recursive
940 clib_warning ("[%d] unmap region %s", getpid (), rp->region_name);
942 region_lock (root_rp, 5);
945 oldheap = svm_push_pvt_heap (rp); /* nb vec_delete() in the loop */
947 /* Remove the caller from the list of mappers */
948 for (i = 0; i < vec_len (rp->client_pids); i++)
950 if (rp->client_pids[i] == mypid)
952 vec_delete (rp->client_pids, 1, i);
956 clib_warning ("pid %d AWOL", mypid);
960 svm_pop_heap (oldheap);
962 nclients_left = vec_len (rp->client_pids);
963 virtual_base = rp->virtual_base;
964 virtual_size = rp->virtual_size;
966 if (nclients_left == 0)
969 svm_main_region_t *mp;
971 svm_subregion_t *subp;
973 /* Kill the region, last guy on his way out */
975 oldheap = svm_push_pvt_heap (root_rp);
976 name = vec_dup (rp->region_name);
978 virtual_base = rp->virtual_base;
979 virtual_size = rp->virtual_size;
981 /* Figure out which bits to clear in the root region bitmap */
982 index = (virtual_base - root_rp->virtual_base) / MMAP_PAGESIZE;
984 nbits = (virtual_size + MMAP_PAGESIZE - 1) / MMAP_PAGESIZE;
987 clib_warning ("clear %d bits at index %d", nbits, index);
989 /* Give back the allocated VM */
990 for (i = 0; i < nbits; i++)
992 clib_bitmap_set_no_check (root_rp->bitmap, index + i, 0);
995 mp = root_rp->data_base;
997 p = hash_get_mem (mp->name_hash, name);
999 /* Better never happen ... */
1003 region_unlock (root_rp);
1004 svm_pop_heap (oldheap);
1005 clib_warning ("Region name '%s' not found?", name);
1009 /* Remove from the root region subregion pool */
1010 subp = mp->subregions + p[0];
1011 pool_put (mp->subregions, subp);
1013 hash_unset_mem (mp->name_hash, name);
1018 shm_unlink (rp->region_name);
1019 munmap ((void *) virtual_base, virtual_size);
1020 region_unlock (root_rp);
1021 svm_pop_heap (oldheap);
1026 region_unlock (root_rp);
1028 munmap ((void *) virtual_base, virtual_size);
1033 * There is no clean way to unlink the
1034 * root region when all clients go away,
1035 * so remove the pid entry and call it a day.
1041 int i, mypid = getpid ();
1042 uword virtual_base, virtual_size;
1044 /* It felt so nice we did it twice... */
1048 if (--root_rp_refcount > 0)
1052 * If we take a signal while holding one or more shared-memory
1053 * mutexes, we may end up back here from an otherwise
1054 * benign exit handler. Bail out to avoid a recursive
1060 region_lock (root_rp, 7);
1061 oldheap = svm_push_pvt_heap (root_rp);
1063 virtual_base = root_rp->virtual_base;
1064 virtual_size = root_rp->virtual_size;
1066 for (i = 0; i < vec_len (root_rp->client_pids); i++)
1068 if (root_rp->client_pids[i] == mypid)
1070 vec_delete (root_rp->client_pids, 1, i);
1074 clib_warning ("pid %d AWOL", mypid);
1078 region_unlock (root_rp);
1079 svm_pop_heap (oldheap);
1082 munmap ((void *) virtual_base, virtual_size);
1086 svm_client_scan_this_region_nolock (svm_region_t * rp)
1089 int mypid = getpid ();
1092 for (j = 0; j < vec_len (rp->client_pids); j++)
1094 if (mypid == rp->client_pids[j])
1096 if (rp->client_pids[j] && (kill (rp->client_pids[j], 0) < 0))
1098 clib_warning ("%s: cleanup ghost pid %d",
1099 rp->region_name, rp->client_pids[j]);
1100 /* nb: client vec in rp->region_heap */
1101 oldheap = svm_push_pvt_heap (rp);
1102 vec_delete (rp->client_pids, 1, j);
1104 svm_pop_heap (oldheap);
1111 * Scan svm regions for dead clients
1114 svm_client_scan (char *root_path)
1117 svm_main_region_t *mp;
1118 svm_map_region_args_t *a = 0;
1119 svm_region_t *root_rp;
1121 svm_subregion_t *subp;
1125 int mypid = getpid ();
1127 vec_validate (a, 0);
1129 svm_region_init_chroot (root_path);
1131 root_rp = svm_get_root_rp ();
1133 pthread_mutex_lock (&root_rp->mutex);
1135 mp = root_rp->data_base;
1137 for (j = 0; j < vec_len (root_rp->client_pids); j++)
1139 if (mypid == root_rp->client_pids[j])
1141 if (root_rp->client_pids[j] && (kill (root_rp->client_pids[j], 0) < 0))
1143 clib_warning ("%s: cleanup ghost pid %d",
1144 root_rp->region_name, root_rp->client_pids[j]);
1145 /* nb: client vec in root_rp->region_heap */
1146 oldheap = svm_push_pvt_heap (root_rp);
1147 vec_delete (root_rp->client_pids, 1, j);
1149 svm_pop_heap (oldheap);
1154 * Snapshoot names, can't hold root rp mutex across
1158 pool_foreach (subp, mp->subregions, ({
1159 name = vec_dup (subp->subregion_name);
1160 vec_add1(svm_names, name);
1164 pthread_mutex_unlock (&root_rp->mutex);
1166 for (i = 0; i < vec_len (svm_names); i++)
1168 vec_validate (a, 0);
1169 a->root_path = root_path;
1170 a->name = (char *) svm_names[i];
1171 rp = svm_region_find_or_create (a);
1174 pthread_mutex_lock (&rp->mutex);
1176 svm_client_scan_this_region_nolock (rp);
1178 pthread_mutex_unlock (&rp->mutex);
1179 svm_region_unmap (rp);
1180 vec_free (svm_names[i]);
1184 vec_free (svm_names);
1192 * fd.io coding-style-patch-verification: ON
1195 * eval: (c-set-style "gnu")