+/* this function is exposed in malloc_mp.h */
+void
+rollback_expand_heap(struct rte_memseg **ms, int n_segs,
+ struct malloc_elem *elem, void *map_addr, size_t map_len)
+{
+ if (elem != NULL) {
+ malloc_elem_free_list_remove(elem);
+ malloc_elem_hide_region(elem, map_addr, map_len);
+ }
+
+ eal_memalloc_free_seg_bulk(ms, n_segs);
+}
+
+/* this function is exposed in malloc_mp.h */
+struct malloc_elem *
+alloc_pages_on_heap(struct malloc_heap *heap, uint64_t pg_sz, size_t elt_size,
+ int socket, unsigned int flags, size_t align, size_t bound,
+ bool contig, struct rte_memseg **ms, int n_segs)
+{
+ struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
+ struct rte_memseg_list *msl;
+ struct malloc_elem *elem = NULL;
+ size_t alloc_sz;
+ int allocd_pages;
+ void *ret, *map_addr;
+
+ alloc_sz = (size_t)pg_sz * n_segs;
+
+ /* first, check if we're allowed to allocate this memory */
+ if (eal_memalloc_mem_alloc_validate(socket,
+ heap->total_size + alloc_sz) < 0) {
+ RTE_LOG(DEBUG, EAL, "User has disallowed allocation\n");
+ return NULL;
+ }
+
+ allocd_pages = eal_memalloc_alloc_seg_bulk(ms, n_segs, pg_sz,
+ socket, true);
+
+ /* make sure we've allocated our pages... */
+ if (allocd_pages < 0)
+ return NULL;
+
+ map_addr = ms[0]->addr;
+ msl = rte_mem_virt2memseg_list(map_addr);
+
+ /* check if we wanted contiguous memory but didn't get it */
+ if (contig && !eal_memalloc_is_contig(msl, map_addr, alloc_sz)) {
+ RTE_LOG(DEBUG, EAL, "%s(): couldn't allocate physically contiguous space\n",
+ __func__);
+ goto fail;
+ }
+
+ /*
+ * Once we have all the memseg lists configured, if there is a dma mask
+ * set, check iova addresses are not out of range. Otherwise the device
+ * setting the dma mask could have problems with the mapped memory.
+ *
+ * There are two situations when this can happen:
+ * 1) memory initialization
+ * 2) dynamic memory allocation
+ *
+ * For 1), an error when checking dma mask implies app can not be
+ * executed. For 2) implies the new memory can not be added.
+ */
+ if (mcfg->dma_maskbits &&
+ rte_mem_check_dma_mask_thread_unsafe(mcfg->dma_maskbits)) {
+ /*
+ * Currently this can only happen if IOMMU is enabled
+ * and the address width supported by the IOMMU hw is
+ * not enough for using the memory mapped IOVAs.
+ *
+ * If IOVA is VA, advice to try with '--iova-mode pa'
+ * which could solve some situations when IOVA VA is not
+ * really needed.
+ */
+ RTE_LOG(ERR, EAL,
+ "%s(): couldn't allocate memory due to IOVA exceeding limits of current DMA mask\n",
+ __func__);
+
+ /*
+ * If IOVA is VA and it is possible to run with IOVA PA,
+ * because user is root, give and advice for solving the
+ * problem.
+ */
+ if ((rte_eal_iova_mode() == RTE_IOVA_VA) &&
+ rte_eal_using_phys_addrs())
+ RTE_LOG(ERR, EAL,
+ "%s(): Please try initializing EAL with --iova-mode=pa parameter\n",
+ __func__);
+ goto fail;
+ }
+
+ /* add newly minted memsegs to malloc heap */
+ elem = malloc_heap_add_memory(heap, msl, map_addr, alloc_sz);
+
+ /* try once more, as now we have allocated new memory */
+ ret = find_suitable_element(heap, elt_size, flags, align, bound,
+ contig);
+
+ if (ret == NULL)
+ goto fail;
+
+ return elem;
+
+fail:
+ rollback_expand_heap(ms, n_segs, elem, map_addr, alloc_sz);
+ return NULL;
+}
+
+static int
+try_expand_heap_primary(struct malloc_heap *heap, uint64_t pg_sz,
+ size_t elt_size, int socket, unsigned int flags, size_t align,
+ size_t bound, bool contig)
+{
+ struct malloc_elem *elem;
+ struct rte_memseg **ms;
+ void *map_addr;
+ size_t alloc_sz;
+ int n_segs;
+ bool callback_triggered = false;
+
+ alloc_sz = RTE_ALIGN_CEIL(align + elt_size +
+ MALLOC_ELEM_TRAILER_LEN, pg_sz);
+ n_segs = alloc_sz / pg_sz;
+
+ /* we can't know in advance how many pages we'll need, so we malloc */
+ ms = malloc(sizeof(*ms) * n_segs);
+ if (ms == NULL)
+ return -1;
+ memset(ms, 0, sizeof(*ms) * n_segs);
+
+ elem = alloc_pages_on_heap(heap, pg_sz, elt_size, socket, flags, align,
+ bound, contig, ms, n_segs);
+
+ if (elem == NULL)
+ goto free_ms;
+
+ map_addr = ms[0]->addr;
+
+ /* notify user about changes in memory map */
+ eal_memalloc_mem_event_notify(RTE_MEM_EVENT_ALLOC, map_addr, alloc_sz);
+
+ /* notify other processes that this has happened */
+ if (request_sync()) {
+ /* we couldn't ensure all processes have mapped memory,
+ * so free it back and notify everyone that it's been
+ * freed back.
+ *
+ * technically, we could've avoided adding memory addresses to
+ * the map, but that would've led to inconsistent behavior
+ * between primary and secondary processes, as those get
+ * callbacks during sync. therefore, force primary process to
+ * do alloc-and-rollback syncs as well.
+ */
+ callback_triggered = true;
+ goto free_elem;
+ }
+ heap->total_size += alloc_sz;
+
+ RTE_LOG(DEBUG, EAL, "Heap on socket %d was expanded by %zdMB\n",
+ socket, alloc_sz >> 20ULL);
+
+ free(ms);
+
+ return 0;
+
+free_elem:
+ if (callback_triggered)
+ eal_memalloc_mem_event_notify(RTE_MEM_EVENT_FREE,
+ map_addr, alloc_sz);
+
+ rollback_expand_heap(ms, n_segs, elem, map_addr, alloc_sz);
+
+ request_sync();
+free_ms:
+ free(ms);
+
+ return -1;
+}
+
+static int
+try_expand_heap_secondary(struct malloc_heap *heap, uint64_t pg_sz,
+ size_t elt_size, int socket, unsigned int flags, size_t align,
+ size_t bound, bool contig)
+{
+ struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
+ struct malloc_mp_req req;
+ int req_result;
+
+ memset(&req, 0, sizeof(req));
+
+ req.t = REQ_TYPE_ALLOC;
+ req.alloc_req.align = align;
+ req.alloc_req.bound = bound;
+ req.alloc_req.contig = contig;
+ req.alloc_req.flags = flags;
+ req.alloc_req.elt_size = elt_size;
+ req.alloc_req.page_sz = pg_sz;
+ req.alloc_req.socket = socket;
+ req.alloc_req.malloc_heap_idx = heap - mcfg->malloc_heaps;
+
+ req_result = request_to_primary(&req);
+
+ if (req_result != 0)
+ return -1;
+
+ if (req.result != REQ_RESULT_SUCCESS)
+ return -1;
+
+ return 0;
+}
+
+static int
+try_expand_heap(struct malloc_heap *heap, uint64_t pg_sz, size_t elt_size,
+ int socket, unsigned int flags, size_t align, size_t bound,
+ bool contig)
+{
+ int ret;
+
+ rte_mcfg_mem_write_lock();
+
+ if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
+ ret = try_expand_heap_primary(heap, pg_sz, elt_size, socket,
+ flags, align, bound, contig);
+ } else {
+ ret = try_expand_heap_secondary(heap, pg_sz, elt_size, socket,
+ flags, align, bound, contig);
+ }
+
+ rte_mcfg_mem_write_unlock();
+ return ret;
+}
+
+static int
+compare_pagesz(const void *a, const void *b)
+{
+ const struct rte_memseg_list * const*mpa = a;
+ const struct rte_memseg_list * const*mpb = b;
+ const struct rte_memseg_list *msla = *mpa;
+ const struct rte_memseg_list *mslb = *mpb;
+ uint64_t pg_sz_a = msla->page_sz;
+ uint64_t pg_sz_b = mslb->page_sz;
+
+ if (pg_sz_a < pg_sz_b)
+ return -1;
+ if (pg_sz_a > pg_sz_b)
+ return 1;
+ return 0;
+}
+
+static int
+alloc_more_mem_on_socket(struct malloc_heap *heap, size_t size, int socket,
+ unsigned int flags, size_t align, size_t bound, bool contig)
+{
+ struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
+ struct rte_memseg_list *requested_msls[RTE_MAX_MEMSEG_LISTS];
+ struct rte_memseg_list *other_msls[RTE_MAX_MEMSEG_LISTS];
+ uint64_t requested_pg_sz[RTE_MAX_MEMSEG_LISTS];
+ uint64_t other_pg_sz[RTE_MAX_MEMSEG_LISTS];
+ uint64_t prev_pg_sz;
+ int i, n_other_msls, n_other_pg_sz, n_requested_msls, n_requested_pg_sz;
+ bool size_hint = (flags & RTE_MEMZONE_SIZE_HINT_ONLY) > 0;
+ unsigned int size_flags = flags & ~RTE_MEMZONE_SIZE_HINT_ONLY;
+ void *ret;
+
+ memset(requested_msls, 0, sizeof(requested_msls));
+ memset(other_msls, 0, sizeof(other_msls));
+ memset(requested_pg_sz, 0, sizeof(requested_pg_sz));
+ memset(other_pg_sz, 0, sizeof(other_pg_sz));
+
+ /*
+ * go through memseg list and take note of all the page sizes available,
+ * and if any of them were specifically requested by the user.
+ */
+ n_requested_msls = 0;
+ n_other_msls = 0;
+ for (i = 0; i < RTE_MAX_MEMSEG_LISTS; i++) {
+ struct rte_memseg_list *msl = &mcfg->memsegs[i];
+
+ if (msl->socket_id != socket)
+ continue;
+
+ if (msl->base_va == NULL)
+ continue;
+
+ /* if pages of specific size were requested */
+ if (size_flags != 0 && check_hugepage_sz(size_flags,
+ msl->page_sz))
+ requested_msls[n_requested_msls++] = msl;
+ else if (size_flags == 0 || size_hint)
+ other_msls[n_other_msls++] = msl;
+ }
+
+ /* sort the lists, smallest first */
+ qsort(requested_msls, n_requested_msls, sizeof(requested_msls[0]),
+ compare_pagesz);
+ qsort(other_msls, n_other_msls, sizeof(other_msls[0]),
+ compare_pagesz);
+
+ /* now, extract page sizes we are supposed to try */
+ prev_pg_sz = 0;
+ n_requested_pg_sz = 0;
+ for (i = 0; i < n_requested_msls; i++) {
+ uint64_t pg_sz = requested_msls[i]->page_sz;
+
+ if (prev_pg_sz != pg_sz) {
+ requested_pg_sz[n_requested_pg_sz++] = pg_sz;
+ prev_pg_sz = pg_sz;
+ }
+ }
+ prev_pg_sz = 0;
+ n_other_pg_sz = 0;
+ for (i = 0; i < n_other_msls; i++) {
+ uint64_t pg_sz = other_msls[i]->page_sz;
+
+ if (prev_pg_sz != pg_sz) {
+ other_pg_sz[n_other_pg_sz++] = pg_sz;
+ prev_pg_sz = pg_sz;
+ }
+ }
+
+ /* finally, try allocating memory of specified page sizes, starting from
+ * the smallest sizes
+ */
+ for (i = 0; i < n_requested_pg_sz; i++) {
+ uint64_t pg_sz = requested_pg_sz[i];
+
+ /*
+ * do not pass the size hint here, as user expects other page
+ * sizes first, before resorting to best effort allocation.
+ */
+ if (!try_expand_heap(heap, pg_sz, size, socket, size_flags,
+ align, bound, contig))
+ return 0;
+ }
+ if (n_other_pg_sz == 0)
+ return -1;
+
+ /* now, check if we can reserve anything with size hint */
+ ret = find_suitable_element(heap, size, flags, align, bound, contig);
+ if (ret != NULL)
+ return 0;
+
+ /*
+ * we still couldn't reserve memory, so try expanding heap with other
+ * page sizes, if there are any
+ */
+ for (i = 0; i < n_other_pg_sz; i++) {
+ uint64_t pg_sz = other_pg_sz[i];
+
+ if (!try_expand_heap(heap, pg_sz, size, socket, flags,
+ align, bound, contig))
+ return 0;
+ }
+ return -1;
+}
+
+/* this will try lower page sizes first */
+static void *
+malloc_heap_alloc_on_heap_id(const char *type, size_t size,
+ unsigned int heap_id, unsigned int flags, size_t align,
+ size_t bound, bool contig)
+{
+ struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
+ struct malloc_heap *heap = &mcfg->malloc_heaps[heap_id];
+ unsigned int size_flags = flags & ~RTE_MEMZONE_SIZE_HINT_ONLY;
+ int socket_id;
+ void *ret;
+ const struct internal_config *internal_conf =
+ eal_get_internal_configuration();
+
+ rte_spinlock_lock(&(heap->lock));
+
+ align = align == 0 ? 1 : align;
+
+ /* for legacy mode, try once and with all flags */
+ if (internal_conf->legacy_mem) {
+ ret = heap_alloc(heap, type, size, flags, align, bound, contig);
+ goto alloc_unlock;
+ }
+
+ /*
+ * we do not pass the size hint here, because even if allocation fails,
+ * we may still be able to allocate memory from appropriate page sizes,
+ * we just need to request more memory first.
+ */
+
+ socket_id = rte_socket_id_by_idx(heap_id);
+ /*
+ * if socket ID is negative, we cannot find a socket ID for this heap -
+ * which means it's an external heap. those can have unexpected page
+ * sizes, so if the user asked to allocate from there - assume user
+ * knows what they're doing, and allow allocating from there with any
+ * page size flags.
+ */
+ if (socket_id < 0)
+ size_flags |= RTE_MEMZONE_SIZE_HINT_ONLY;
+
+ ret = heap_alloc(heap, type, size, size_flags, align, bound, contig);
+ if (ret != NULL)
+ goto alloc_unlock;
+
+ /* if socket ID is invalid, this is an external heap */
+ if (socket_id < 0)
+ goto alloc_unlock;
+
+ if (!alloc_more_mem_on_socket(heap, size, socket_id, flags, align,
+ bound, contig)) {
+ ret = heap_alloc(heap, type, size, flags, align, bound, contig);
+
+ /* this should have succeeded */
+ if (ret == NULL)
+ RTE_LOG(ERR, EAL, "Error allocating from heap\n");
+ }
+alloc_unlock:
+ rte_spinlock_unlock(&(heap->lock));
+ return ret;
+}
+
+void *
+malloc_heap_alloc(const char *type, size_t size, int socket_arg,
+ unsigned int flags, size_t align, size_t bound, bool contig)
+{
+ int socket, heap_id, i;
+ void *ret;
+
+ /* return NULL if size is 0 or alignment is not power-of-2 */
+ if (size == 0 || (align && !rte_is_power_of_2(align)))
+ return NULL;
+
+ if (!rte_eal_has_hugepages() && socket_arg < RTE_MAX_NUMA_NODES)
+ socket_arg = SOCKET_ID_ANY;
+
+ if (socket_arg == SOCKET_ID_ANY)
+ socket = malloc_get_numa_socket();
+ else
+ socket = socket_arg;
+
+ /* turn socket ID into heap ID */
+ heap_id = malloc_socket_to_heap_id(socket);
+ /* if heap id is negative, socket ID was invalid */
+ if (heap_id < 0)
+ return NULL;
+
+ ret = malloc_heap_alloc_on_heap_id(type, size, heap_id, flags, align,
+ bound, contig);
+ if (ret != NULL || socket_arg != SOCKET_ID_ANY)
+ return ret;
+
+ /* try other heaps. we are only iterating through native DPDK sockets,
+ * so external heaps won't be included.
+ */
+ for (i = 0; i < (int) rte_socket_count(); i++) {
+ if (i == heap_id)
+ continue;
+ ret = malloc_heap_alloc_on_heap_id(type, size, i, flags, align,
+ bound, contig);
+ if (ret != NULL)
+ return ret;
+ }
+ return NULL;
+}
+
+static void *
+heap_alloc_biggest_on_heap_id(const char *type, unsigned int heap_id,
+ unsigned int flags, size_t align, bool contig)
+{
+ struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
+ struct malloc_heap *heap = &mcfg->malloc_heaps[heap_id];
+ void *ret;
+
+ rte_spinlock_lock(&(heap->lock));
+
+ align = align == 0 ? 1 : align;
+
+ ret = heap_alloc_biggest(heap, type, flags, align, contig);
+
+ rte_spinlock_unlock(&(heap->lock));
+
+ return ret;
+}
+
+void *
+malloc_heap_alloc_biggest(const char *type, int socket_arg, unsigned int flags,
+ size_t align, bool contig)
+{
+ int socket, i, cur_socket, heap_id;
+ void *ret;
+
+ /* return NULL if align is not power-of-2 */
+ if ((align && !rte_is_power_of_2(align)))
+ return NULL;
+
+ if (!rte_eal_has_hugepages())
+ socket_arg = SOCKET_ID_ANY;
+
+ if (socket_arg == SOCKET_ID_ANY)
+ socket = malloc_get_numa_socket();
+ else
+ socket = socket_arg;
+
+ /* turn socket ID into heap ID */
+ heap_id = malloc_socket_to_heap_id(socket);
+ /* if heap id is negative, socket ID was invalid */
+ if (heap_id < 0)
+ return NULL;
+
+ ret = heap_alloc_biggest_on_heap_id(type, heap_id, flags, align,
+ contig);
+ if (ret != NULL || socket_arg != SOCKET_ID_ANY)
+ return ret;
+
+ /* try other heaps */
+ for (i = 0; i < (int) rte_socket_count(); i++) {
+ cur_socket = rte_socket_id_by_idx(i);
+ if (cur_socket == socket)
+ continue;
+ ret = heap_alloc_biggest_on_heap_id(type, i, flags, align,
+ contig);
+ if (ret != NULL)
+ return ret;
+ }
+ return NULL;
+}
+
+/* this function is exposed in malloc_mp.h */
+int
+malloc_heap_free_pages(void *aligned_start, size_t aligned_len)
+{
+ int n_segs, seg_idx, max_seg_idx;
+ struct rte_memseg_list *msl;
+ size_t page_sz;
+
+ msl = rte_mem_virt2memseg_list(aligned_start);
+ if (msl == NULL)
+ return -1;
+
+ page_sz = (size_t)msl->page_sz;
+ n_segs = aligned_len / page_sz;
+ seg_idx = RTE_PTR_DIFF(aligned_start, msl->base_va) / page_sz;
+ max_seg_idx = seg_idx + n_segs;
+
+ for (; seg_idx < max_seg_idx; seg_idx++) {
+ struct rte_memseg *ms;
+
+ ms = rte_fbarray_get(&msl->memseg_arr, seg_idx);
+ eal_memalloc_free_seg(ms);
+ }
+ return 0;
+}
+
+int
+malloc_heap_free(struct malloc_elem *elem)
+{
+ struct malloc_heap *heap;
+ void *start, *aligned_start, *end, *aligned_end;
+ size_t len, aligned_len, page_sz;
+ struct rte_memseg_list *msl;
+ unsigned int i, n_segs, before_space, after_space;
+ int ret;
+ const struct internal_config *internal_conf =
+ eal_get_internal_configuration();
+
+ if (!malloc_elem_cookies_ok(elem) || elem->state != ELEM_BUSY)
+ return -1;
+
+ /* elem may be merged with previous element, so keep heap address */
+ heap = elem->heap;
+ msl = elem->msl;
+ page_sz = (size_t)msl->page_sz;
+
+ rte_spinlock_lock(&(heap->lock));
+
+ /* mark element as free */
+ elem->state = ELEM_FREE;
+
+ elem = malloc_elem_free(elem);
+
+ /* anything after this is a bonus */
+ ret = 0;
+
+ /* ...of which we can't avail if we are in legacy mode, or if this is an
+ * externally allocated segment.
+ */
+ if (internal_conf->legacy_mem || (msl->external > 0))
+ goto free_unlock;
+
+ /* check if we can free any memory back to the system */
+ if (elem->size < page_sz)
+ goto free_unlock;
+
+ /* if user requested to match allocations, the sizes must match - if not,
+ * we will defer freeing these hugepages until the entire original allocation
+ * can be freed
+ */
+ if (internal_conf->match_allocations && elem->size != elem->orig_size)
+ goto free_unlock;
+
+ /* probably, but let's make sure, as we may not be using up full page */
+ start = elem;
+ len = elem->size;
+ aligned_start = RTE_PTR_ALIGN_CEIL(start, page_sz);
+ end = RTE_PTR_ADD(elem, len);
+ aligned_end = RTE_PTR_ALIGN_FLOOR(end, page_sz);
+
+ aligned_len = RTE_PTR_DIFF(aligned_end, aligned_start);
+
+ /* can't free anything */
+ if (aligned_len < page_sz)
+ goto free_unlock;
+
+ /* we can free something. however, some of these pages may be marked as
+ * unfreeable, so also check that as well
+ */
+ n_segs = aligned_len / page_sz;
+ for (i = 0; i < n_segs; i++) {
+ const struct rte_memseg *tmp =
+ rte_mem_virt2memseg(aligned_start, msl);
+
+ if (tmp->flags & RTE_MEMSEG_FLAG_DO_NOT_FREE) {
+ /* this is an unfreeable segment, so move start */
+ aligned_start = RTE_PTR_ADD(tmp->addr, tmp->len);
+ }
+ }
+
+ /* recalculate length and number of segments */
+ aligned_len = RTE_PTR_DIFF(aligned_end, aligned_start);
+ n_segs = aligned_len / page_sz;
+
+ /* check if we can still free some pages */
+ if (n_segs == 0)
+ goto free_unlock;
+
+ /* We're not done yet. We also have to check if by freeing space we will
+ * be leaving free elements that are too small to store new elements.
+ * Check if we have enough space in the beginning and at the end, or if
+ * start/end are exactly page aligned.
+ */
+ before_space = RTE_PTR_DIFF(aligned_start, elem);
+ after_space = RTE_PTR_DIFF(end, aligned_end);
+ if (before_space != 0 &&
+ before_space < MALLOC_ELEM_OVERHEAD + MIN_DATA_SIZE) {
+ /* There is not enough space before start, but we may be able to
+ * move the start forward by one page.
+ */
+ if (n_segs == 1)
+ goto free_unlock;
+
+ /* move start */
+ aligned_start = RTE_PTR_ADD(aligned_start, page_sz);
+ aligned_len -= page_sz;
+ n_segs--;
+ }
+ if (after_space != 0 && after_space <
+ MALLOC_ELEM_OVERHEAD + MIN_DATA_SIZE) {
+ /* There is not enough space after end, but we may be able to
+ * move the end backwards by one page.
+ */
+ if (n_segs == 1)
+ goto free_unlock;
+
+ /* move end */
+ aligned_end = RTE_PTR_SUB(aligned_end, page_sz);
+ aligned_len -= page_sz;
+ n_segs--;
+ }
+
+ /* now we can finally free us some pages */
+
+ rte_mcfg_mem_write_lock();
+
+ /*
+ * we allow secondary processes to clear the heap of this allocated
+ * memory because it is safe to do so, as even if notifications about
+ * unmapped pages don't make it to other processes, heap is shared
+ * across all processes, and will become empty of this memory anyway,
+ * and nothing can allocate it back unless primary process will be able
+ * to deliver allocation message to every single running process.
+ */
+
+ malloc_elem_free_list_remove(elem);
+
+ malloc_elem_hide_region(elem, (void *) aligned_start, aligned_len);
+
+ heap->total_size -= aligned_len;
+
+ if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
+ /* notify user about changes in memory map */
+ eal_memalloc_mem_event_notify(RTE_MEM_EVENT_FREE,
+ aligned_start, aligned_len);
+
+ /* don't care if any of this fails */
+ malloc_heap_free_pages(aligned_start, aligned_len);
+
+ request_sync();
+ } else {
+ struct malloc_mp_req req;
+
+ memset(&req, 0, sizeof(req));
+
+ req.t = REQ_TYPE_FREE;
+ req.free_req.addr = aligned_start;
+ req.free_req.len = aligned_len;
+
+ /*
+ * we request primary to deallocate pages, but we don't do it
+ * in this thread. instead, we notify primary that we would like
+ * to deallocate pages, and this process will receive another
+ * request (in parallel) that will do it for us on another
+ * thread.
+ *
+ * we also don't really care if this succeeds - the data is
+ * already removed from the heap, so it is, for all intents and
+ * purposes, hidden from the rest of DPDK even if some other
+ * process (including this one) may have these pages mapped.
+ *
+ * notifications about deallocated memory happen during sync.
+ */
+ request_to_primary(&req);
+ }
+
+ RTE_LOG(DEBUG, EAL, "Heap on socket %d was shrunk by %zdMB\n",
+ msl->socket_id, aligned_len >> 20ULL);
+
+ rte_mcfg_mem_write_unlock();
+free_unlock:
+ rte_spinlock_unlock(&(heap->lock));
+ return ret;
+}
+
+int
+malloc_heap_resize(struct malloc_elem *elem, size_t size)
+{
+ int ret;
+
+ if (!malloc_elem_cookies_ok(elem) || elem->state != ELEM_BUSY)
+ return -1;
+
+ rte_spinlock_lock(&(elem->heap->lock));
+
+ ret = malloc_elem_resize(elem, size);
+
+ rte_spinlock_unlock(&(elem->heap->lock));
+
+ return ret;
+}
+