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");
231 if (statb.st_mode & S_IFREG) {
232 if (statb.st_size == 0) {
233 lseek(fd, map_size, SEEK_SET);
234 if (write(fd, &junk, 1) != 1)
235 clib_unix_warning ("set region size");
237 map_size = rnd_pagesize (statb.st_size);
240 map_size = a->backing_mmap_size;
243 ASSERT(map_size <= rp->virtual_size -
244 (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE));
246 if (mmap (rp->data_base, map_size, PROT_READ | PROT_WRITE,
247 MAP_SHARED | MAP_FIXED, fd, 0) == MAP_FAILED) {
248 clib_unix_warning("mmap");
252 rp->backing_file = (char *) format(0, "%s\0", a->backing_file);
253 rp->flags |= SVM_FLAGS_FILE;
256 if (a->flags & SVM_FLAGS_MHEAP) {
258 mheap_alloc_with_flags ((void *)(rp->data_base), map_size,
259 MHEAP_FLAG_DISABLE_VM);
260 rp->flags |= SVM_FLAGS_MHEAP;
265 static int svm_data_region_map (svm_map_region_args_t *a,
273 map_size = rp->virtual_size - (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE);
275 if (a->flags & SVM_FLAGS_FILE) {
277 fd = open (a->backing_file, O_RDWR, 0777);
280 clib_unix_warning ("open");
284 if (fstat(fd, &statb) < 0) {
285 clib_unix_warning("fstat");
289 if (statb.st_mode & S_IFREG) {
290 if (statb.st_size == 0) {
291 lseek(fd, map_size, SEEK_SET);
292 if (write(fd, &junk, 1) != 1)
293 clib_unix_warning ("set region size");
295 map_size = rnd_pagesize (statb.st_size);
298 map_size = a->backing_mmap_size;
301 ASSERT(map_size <= rp->virtual_size
302 - (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE));
304 if (mmap (rp->data_base, map_size, PROT_READ | PROT_WRITE,
305 MAP_SHARED | MAP_FIXED, fd, 0) == MAP_FAILED) {
306 clib_unix_warning("mmap");
314 u8 *shm_name_from_svm_map_region_args (svm_map_region_args_t *a)
320 int root_path_offset = 0;
324 /* Tolerate present or absent slashes */
325 if (a->root_path[0] == '/')
328 /* create the root_path under /dev/shm
329 iterate through path creating directories */
331 path = format (0, "/dev/shm/%s%c", &a->root_path[root_path_offset], 0);
332 split_point = path+1;
333 vec_add1(mkdir_arg, '-');
335 while (*split_point) {
336 while (*split_point && *split_point != '/') {
337 vec_add1 (mkdir_arg, *split_point);
340 vec_add1 (mkdir_arg, 0);
341 if (mkdir ((char *) mkdir_arg, 0777) < 0 && errno != EEXIST)
342 clib_unix_warning ("mkdir %s", mkdir_arg);
344 /* ready to descend another level */
345 mkdir_arg[vec_len(mkdir_arg)-1] = '-';
351 if (a->name[0] == '/')
354 shm_name = format (0, "/%s-%s%c", a->root_path,
355 &a->name[name_offset], 0);
358 shm_name = format (0, "%s%c", a->name, 0);
365 void *svm_map_region (svm_map_region_args_t *a)
369 pthread_mutexattr_t attr;
370 pthread_condattr_t cattr;
377 int nbits, words, bit;
378 int pid_holding_region_lock;
380 int dead_region_recovery = 0;
383 struct timespec ts, tsrem;
386 clib_warning ("[%d] map region %s", getpid(), a->name);
388 ASSERT((a->size & ~(MMAP_PAGESIZE-1)) == a->size);
391 shm_name = shm_name_from_svm_map_region_args (a);
393 svm_fd = shm_open((char *) shm_name, O_RDWR | O_CREAT | O_EXCL, 0777);
399 lseek(svm_fd, a->size, SEEK_SET);
400 if (write(svm_fd, &junk, 1) != 1)
401 clib_warning ("set region size");
403 rp = mmap((void *)a->baseva, a->size,
404 PROT_READ | PROT_WRITE, MAP_SHARED | MAP_FIXED, svm_fd, 0);
406 if (rp == (svm_region_t *) MAP_FAILED) {
407 clib_unix_warning ("mmap create");
411 memset(rp, 0, sizeof(*rp));
413 if (pthread_mutexattr_init(&attr))
414 clib_unix_warning("mutexattr_init");
416 if (pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_SHARED))
417 clib_unix_warning("mutexattr_setpshared");
419 if (pthread_mutex_init(&rp->mutex, &attr))
420 clib_unix_warning("mutex_init");
422 if (pthread_mutexattr_destroy(&attr))
423 clib_unix_warning("mutexattr_destroy");
425 if (pthread_condattr_init(&cattr))
426 clib_unix_warning("condattr_init");
428 if (pthread_condattr_setpshared(&cattr, PTHREAD_PROCESS_SHARED))
429 clib_unix_warning("condattr_setpshared");
431 if (pthread_cond_init(&rp->condvar, &cattr))
432 clib_unix_warning("cond_init");
434 if(pthread_condattr_destroy(&cattr))
435 clib_unix_warning("condattr_destroy");
439 rp->virtual_base = a->baseva;
440 rp->virtual_size = a->size;
443 mheap_alloc_with_flags ((void *)(a->baseva+MMAP_PAGESIZE),
445 MHEAP_FLAG_DISABLE_VM);
446 oldheap = svm_push_pvt_heap(rp);
448 rp->region_name = (char *)format (0, "%s%c", a->name, 0);
449 vec_add1(rp->client_pids, getpid());
451 nbits = rp->virtual_size / MMAP_PAGESIZE;
454 rp->bitmap_size = nbits;
455 words = (nbits + BITS(uword)-1) / BITS(uword);
456 vec_validate (rp->bitmap, words-1);
458 overhead_space = MMAP_PAGESIZE /* header */ +
462 data_base = (uword)rp->virtual_base;
464 if (a->flags & SVM_FLAGS_NODATA)
465 rp->flags |= SVM_FLAGS_NEED_DATA_INIT;
468 clib_bitmap_set_no_check (rp->bitmap, bit, 1);
470 overhead_space -= MMAP_PAGESIZE;
471 data_base += MMAP_PAGESIZE;
472 } while (overhead_space > 0);
474 rp->data_base = (void *)data_base;
477 * Note: although the POSIX spec guarantees that only one
478 * process enters this block, we have to play games
479 * to hold off clients until e.g. the mutex is ready
481 rp->version = SVM_VERSION;
483 /* setup the data portion of the region */
485 rv = svm_data_region_create (a, rp);
487 clib_warning ("data_region_create: %d", rv);
492 svm_pop_heap(oldheap);
494 return ((void *) rp);
496 svm_fd = shm_open((char *)shm_name, O_RDWR, 0777);
501 perror("svm_region_map(mmap open)");
507 if (0 != fstat(svm_fd, &stat)) {
508 clib_warning("fstat failed: %d", errno);
511 if (stat.st_size > 0) {
514 if (0 == time_left) {
515 clib_warning("waiting for resize of shm file timed out");
519 ts.tv_nsec = 100000000;
520 while (nanosleep(&ts, &tsrem) < 0)
525 rp = mmap(0, MMAP_PAGESIZE,
526 PROT_READ | PROT_WRITE, MAP_SHARED, svm_fd, 0);
528 if (rp == (svm_region_t *) MAP_FAILED) {
530 clib_warning("mmap");
534 * We lost the footrace to create this region; make sure
535 * the winner has crossed the finish line.
537 while (rp->version == 0 && deadman++ < 5) {
544 if (rp->version == 0) {
547 clib_warning("rp->version %d not %d", rp->version,
551 /* Remap now that the region has been placed */
552 a->baseva = rp->virtual_base;
553 a->size = rp->virtual_size;
554 munmap(rp, MMAP_PAGESIZE);
556 rp = (void *) mmap ((void *)a->baseva, a->size,
557 PROT_READ | PROT_WRITE,
558 MAP_SHARED | MAP_FIXED, svm_fd, 0);
559 if ((uword)rp == (uword)MAP_FAILED) {
560 clib_unix_warning ("mmap");
564 if ((uword) rp != rp->virtual_base) {
565 clib_warning("mmap botch");
569 * Try to fix the region mutex if it is held by
572 pid_holding_region_lock = rp->mutex_owner_pid;
573 if (pid_holding_region_lock &&
574 kill (pid_holding_region_lock, 0) < 0) {
576 "region %s mutex held by dead pid %d, tag %d, force unlock",
577 rp->region_name, pid_holding_region_lock, rp->mutex_owner_tag);
578 /* owner pid is nonexistent */
579 rp->mutex.__data.__owner = 0;
580 rp->mutex.__data.__lock = 0;
581 dead_region_recovery = 1;
584 if (dead_region_recovery)
585 clib_warning ("recovery: attempt to re-lock region");
588 oldheap = svm_push_pvt_heap (rp);
589 vec_add1(rp->client_pids, getpid());
591 if (dead_region_recovery)
592 clib_warning ("recovery: attempt svm_data_region_map");
594 rv = svm_data_region_map (a, rp);
596 clib_warning ("data_region_map: %d", rv);
599 if (dead_region_recovery)
600 clib_warning ("unlock and continue");
604 svm_pop_heap(oldheap);
606 return ((void *) rp);
609 return 0; /* NOTREACHED */
612 static void svm_mutex_cleanup (void)
615 for (i = 0; i < nheld; i++) {
616 pthread_mutex_unlock (mutexes_held[i]);
620 static void svm_region_init_internal (char *root_path)
623 svm_map_region_args_t *a=0;
624 u64 ticks = clib_cpu_time_now();
625 uword randomize_baseva;
627 /* guard against klutz calls */
632 atexit(svm_mutex_cleanup);
634 /* Randomize the shared-VM base at init time */
635 if (MMAP_PAGESIZE <= (4<<10))
636 randomize_baseva = (ticks & 15) * MMAP_PAGESIZE;
638 randomize_baseva = (ticks & 3) * MMAP_PAGESIZE;
641 a->root_path = root_path;
642 a->name = SVM_GLOBAL_REGION_NAME;
643 a->baseva = SVM_GLOBAL_REGION_BASEVA + randomize_baseva;
644 a->size = SVM_GLOBAL_REGION_SIZE;
645 a->flags = SVM_FLAGS_NODATA;
647 rp = svm_map_region (a);
652 /* Set up the main region data structures */
653 if (rp->flags & SVM_FLAGS_NEED_DATA_INIT) {
654 svm_main_region_t *mp = 0;
657 rp->flags &= ~(SVM_FLAGS_NEED_DATA_INIT);
659 oldheap = svm_push_pvt_heap (rp);
660 vec_validate (mp, 0);
661 mp->name_hash = hash_create_string (0, sizeof(uword));
662 mp->root_path = root_path
663 ? format (0, "%s%c", root_path, 0) : 0 ;
665 svm_pop_heap (oldheap);
672 void svm_region_init (void)
674 svm_region_init_internal (0);
677 void svm_region_init_chroot (char *root_path)
679 svm_region_init_internal (root_path);
682 void *svm_region_find_or_create (svm_map_region_args_t *a)
684 svm_main_region_t *mp;
691 svm_subregion_t *subp;
695 a->size += MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE;
696 a->size = rnd_pagesize(a->size);
698 region_lock (root_rp, 4);
699 oldheap = svm_push_pvt_heap(root_rp);
700 mp = root_rp->data_base;
704 /* Map the named region from the correct chroot environment */
705 a->root_path = (char *) mp->root_path;
708 * See if this region is already known. If it is, we're
711 p = hash_get_mem (mp->name_hash, a->name);
714 rp = svm_map_region (a);
715 region_unlock(root_rp);
716 svm_pop_heap (oldheap);
720 /* Create the region. */
721 ASSERT((a->size & ~(MMAP_PAGESIZE-1)) == a->size);
723 need_nbits = a->size / MMAP_PAGESIZE;
725 index = 1; /* $$$ fixme, figure out how many bit to really skip */
728 * Scan the virtual space allocation bitmap, looking for a large
732 if (clib_bitmap_get_no_check(root_rp->bitmap, index) == 0) {
733 for (i = 0; i < (need_nbits-1); i++) {
734 if (clib_bitmap_get_no_check(root_rp->bitmap,
744 } while (index < root_rp->bitmap_size);
746 /* Completely out of VM? */
747 if (index >= root_rp->bitmap_size) {
748 clib_warning("region %s: not enough VM to allocate 0x%x",
749 root_rp->region_name, a->size);
750 svm_pop_heap (oldheap);
751 region_unlock (root_rp);
756 * Mark virtual space allocated
759 clib_warning ("set %d bits at index %d", need_nbits, index);
762 for (i = 0; i < need_nbits; i++) {
763 clib_bitmap_set_no_check (root_rp->bitmap, index+i, 1);
766 /* Place this region where it goes... */
767 a->baseva = root_rp->virtual_base + index*MMAP_PAGESIZE;
769 rp = svm_map_region (a);
771 pool_get (mp->subregions, subp);
772 name = format (0, "%s%c", a->name, 0);
773 subp->subregion_name = name;
775 hash_set_mem (mp->name_hash, name, subp - mp->subregions);
777 svm_pop_heap (oldheap);
779 region_unlock (root_rp);
787 * Let go of the indicated region. If the calling process
788 * is the last customer, throw it away completely.
789 * The root region mutex guarantees atomicity with respect to
790 * a new region client showing up at the wrong moment.
792 void svm_region_unmap (void *rp_arg)
794 int i, mypid = getpid();
797 uword virtual_base, virtual_size;
798 svm_region_t *rp = rp_arg;
802 * If we take a signal while holding one or more shared-memory
803 * mutexes, we may end up back here from an otherwise
804 * benign exit handler. Bail out to avoid a recursive
814 clib_warning ("[%d] unmap region %s", getpid(), rp->region_name);
816 region_lock (root_rp, 5);
819 oldheap = svm_push_pvt_heap (rp); /* nb vec_delete() in the loop */
821 /* Remove the caller from the list of mappers */
822 for (i = 0; i < vec_len(rp->client_pids); i++) {
823 if (rp->client_pids[i] == mypid) {
824 vec_delete (rp->client_pids, 1, i);
828 clib_warning("pid %d AWOL", mypid);
832 svm_pop_heap (oldheap);
834 nclients_left = vec_len(rp->client_pids);
835 virtual_base = rp->virtual_base;
836 virtual_size = rp->virtual_size;
838 if (nclients_left == 0) {
840 svm_main_region_t *mp;
842 svm_subregion_t *subp;
844 /* Kill the region, last guy on his way out */
846 oldheap = svm_push_pvt_heap (root_rp);
847 name = vec_dup (rp->region_name);
849 virtual_base = rp->virtual_base;
850 virtual_size = rp->virtual_size;
852 /* Figure out which bits to clear in the root region bitmap */
853 index = (virtual_base - root_rp->virtual_base)
856 nbits = (virtual_size + MMAP_PAGESIZE - 1)
860 clib_warning ("clear %d bits at index %d", nbits, index);
862 /* Give back the allocated VM */
863 for (i = 0; i < nbits; i++) {
864 clib_bitmap_set_no_check (root_rp->bitmap, index+i, 0);
867 mp = root_rp->data_base;
869 p = hash_get_mem (mp->name_hash, name);
871 /* Better never happen ... */
874 region_unlock (root_rp);
875 svm_pop_heap (oldheap);
876 clib_warning ("Region name '%s' not found?", name);
880 /* Remove from the root region subregion pool */
881 subp = mp->subregions + p[0];
882 pool_put (mp->subregions, subp);
884 hash_unset_mem (mp->name_hash, name);
889 shm_unlink(rp->region_name);
890 munmap ((void *)virtual_base, virtual_size);
891 region_unlock (root_rp);
892 svm_pop_heap (oldheap);
897 region_unlock(root_rp);
899 munmap ((void *)virtual_base, virtual_size);
904 * There is no clean way to unlink the
905 * root region when all clients go away,
906 * so remove the pid entry and call it a day.
908 void svm_region_exit ()
911 int i, mypid = getpid();
912 uword virtual_base, virtual_size;
914 /* It felt so nice we did it twice... */
918 if (--root_rp_refcount > 0)
922 * If we take a signal while holding one or more shared-memory
923 * mutexes, we may end up back here from an otherwise
924 * benign exit handler. Bail out to avoid a recursive
930 region_lock(root_rp, 7);
931 oldheap = svm_push_pvt_heap (root_rp);
933 virtual_base = root_rp->virtual_base;
934 virtual_size = root_rp->virtual_size;
936 for (i = 0; i < vec_len(root_rp->client_pids); i++) {
937 if (root_rp->client_pids[i] == mypid) {
938 vec_delete (root_rp->client_pids, 1, i);
942 clib_warning("pid %d AWOL", mypid);
946 region_unlock(root_rp);
947 svm_pop_heap (oldheap);
950 munmap ((void *)virtual_base, virtual_size);
953 void svm_client_scan_this_region_nolock (svm_region_t *rp)
956 int mypid = getpid();
959 for (j = 0; j < vec_len(rp->client_pids); j++) {
960 if (mypid == rp->client_pids[j])
962 if (rp->client_pids[j] && (kill (rp->client_pids[j], 0) < 0)) {
963 clib_warning ("%s: cleanup ghost pid %d",
964 rp->region_name, rp->client_pids[j]);
965 /* nb: client vec in rp->region_heap */
966 oldheap = svm_push_pvt_heap (rp);
967 vec_delete (rp->client_pids, 1, j);
969 svm_pop_heap (oldheap);
976 * Scan svm regions for dead clients
978 void svm_client_scan(char *root_path)
981 svm_main_region_t *mp;
982 svm_map_region_args_t *a = 0;
983 svm_region_t *root_rp;
985 svm_subregion_t *subp;
989 int mypid = getpid();
993 svm_region_init_chroot(root_path);
995 root_rp = svm_get_root_rp();
997 pthread_mutex_lock (&root_rp->mutex);
999 mp = root_rp->data_base;
1001 for (j = 0; j < vec_len (root_rp->client_pids); j++) {
1002 if (mypid == root_rp->client_pids[j])
1004 if (root_rp->client_pids[j]
1005 && (kill (root_rp->client_pids[j], 0) < 0)) {
1006 clib_warning ("%s: cleanup ghost pid %d",
1007 root_rp->region_name, root_rp->client_pids[j]);
1008 /* nb: client vec in root_rp->region_heap */
1009 oldheap = svm_push_pvt_heap (root_rp);
1010 vec_delete (root_rp->client_pids, 1, j);
1012 svm_pop_heap (oldheap);
1017 * Snapshoot names, can't hold root rp mutex across
1020 pool_foreach (subp, mp->subregions, ({
1021 name = vec_dup (subp->subregion_name);
1022 vec_add1(svm_names, name);
1025 pthread_mutex_unlock (&root_rp->mutex);
1027 for (i = 0; i < vec_len(svm_names); i++) {
1029 a->root_path = root_path;
1030 a->name = (char *) svm_names[i];
1031 rp = svm_region_find_or_create (a);
1033 pthread_mutex_lock (&rp->mutex);
1035 svm_client_scan_this_region_nolock (rp);
1037 pthread_mutex_unlock (&rp->mutex);
1038 svm_region_unmap (rp);
1039 vec_free(svm_names[i]);
1043 vec_free(svm_names);