diff --git a/include/jemalloc/internal/arena_structs.h b/include/jemalloc/internal/arena_structs.h
index 9563c3d6..6e8b8291 100644
--- a/include/jemalloc/internal/arena_structs.h
+++ b/include/jemalloc/internal/arena_structs.h
@@ -52,8 +52,8 @@ struct arena_decay_s {
 	/*
 	 * Number of unpurged pages at beginning of current epoch.  During epoch
 	 * advancement we use the delta between arena->decay_*.nunpurged and
-	 * extents_npages_get(&arena->extents_*) to determine how many dirty
-	 * pages, if any, were generated.
+	 * eset_npages_get(&arena->extents_*) to determine how many dirty pages,
+	 * if any, were generated.
 	 */
 	size_t			nunpurged;
 	/*
diff --git a/include/jemalloc/internal/eset.h b/include/jemalloc/internal/eset.h
index abd37cad..1e055397 100644
--- a/include/jemalloc/internal/eset.h
+++ b/include/jemalloc/internal/eset.h
@@ -64,4 +64,10 @@ bool eset_init(tsdn_t *tsdn, eset_t *eset, extent_state_t state,
     bool delay_coalesce);
 extent_state_t eset_state_get(const eset_t *eset);
 
+size_t eset_npages_get(eset_t *eset);
+/* Get the number of extents in the given page size index. */
+size_t eset_nextents_get(eset_t *eset, pszind_t ind);
+/* Get the sum total bytes of the extents in the given page size index. */
+size_t eset_nbytes_get(eset_t *eset, pszind_t ind);
+
 #endif /* JEMALLOC_INTERNAL_ESET_H */
diff --git a/include/jemalloc/internal/extent_externs.h b/include/jemalloc/internal/extent_externs.h
index 2e196dd0..1c930275 100644
--- a/include/jemalloc/internal/extent_externs.h
+++ b/include/jemalloc/internal/extent_externs.h
@@ -27,11 +27,6 @@ size_t extent_size_quantize_ceil(size_t size);
 ph_proto(, extent_avail_, extent_tree_t, extent_t)
 ph_proto(, extent_heap_, extent_heap_t, extent_t)
 
-size_t extents_npages_get(eset_t *eset);
-/* Get the number of extents in the given page size index. */
-size_t extents_nextents_get(eset_t *eset, pszind_t ind);
-/* Get the sum total bytes of the extents in the given page size index. */
-size_t extents_nbytes_get(eset_t *eset, pszind_t ind);
 extent_t *extents_alloc(tsdn_t *tsdn, arena_t *arena,
     extent_hooks_t **r_extent_hooks, eset_t *eset, void *new_addr,
     size_t size, size_t pad, size_t alignment, bool slab, szind_t szind,
diff --git a/src/arena.c b/src/arena.c
index 3eae7e35..9dba4e73 100644
--- a/src/arena.c
+++ b/src/arena.c
@@ -75,8 +75,8 @@ arena_basic_stats_merge(tsdn_t *tsdn, arena_t *arena, unsigned *nthreads,
 	*dirty_decay_ms = arena_dirty_decay_ms_get(arena);
 	*muzzy_decay_ms = arena_muzzy_decay_ms_get(arena);
 	*nactive += atomic_load_zu(&arena->nactive, ATOMIC_RELAXED);
-	*ndirty += extents_npages_get(&arena->extents_dirty);
-	*nmuzzy += extents_npages_get(&arena->extents_muzzy);
+	*ndirty += eset_npages_get(&arena->extents_dirty);
+	*nmuzzy += eset_npages_get(&arena->extents_muzzy);
 }
 
 void
@@ -99,7 +99,7 @@ arena_stats_merge(tsdn_t *tsdn, arena_t *arena, unsigned *nthreads,
 	arena_stats_accum_zu(&astats->mapped, base_mapped
 	    + arena_stats_read_zu(tsdn, &arena->stats, &arena->stats.mapped));
 	arena_stats_accum_zu(&astats->retained,
-	    extents_npages_get(&arena->extents_retained) << LG_PAGE);
+	    eset_npages_get(&arena->extents_retained) << LG_PAGE);
 
 	atomic_store_zu(&astats->extent_avail,
 	    atomic_load_zu(&arena->extent_avail_cnt, ATOMIC_RELAXED),
@@ -130,8 +130,8 @@ arena_stats_merge(tsdn_t *tsdn, arena_t *arena, unsigned *nthreads,
 	arena_stats_accum_zu(&astats->metadata_thp, metadata_thp);
 	arena_stats_accum_zu(&astats->resident, base_resident +
 	    (((atomic_load_zu(&arena->nactive, ATOMIC_RELAXED) +
-	    extents_npages_get(&arena->extents_dirty) +
-	    extents_npages_get(&arena->extents_muzzy)) << LG_PAGE)));
+	    eset_npages_get(&arena->extents_dirty) +
+	    eset_npages_get(&arena->extents_muzzy)) << LG_PAGE)));
 	arena_stats_accum_zu(&astats->abandoned_vm, atomic_load_zu(
 	    &arena->stats.abandoned_vm, ATOMIC_RELAXED));
 
@@ -173,13 +173,12 @@ arena_stats_merge(tsdn_t *tsdn, arena_t *arena, unsigned *nthreads,
 	for (pszind_t i = 0; i < SC_NPSIZES; i++) {
 		size_t dirty, muzzy, retained, dirty_bytes, muzzy_bytes,
 		    retained_bytes;
-		dirty = extents_nextents_get(&arena->extents_dirty, i);
-		muzzy = extents_nextents_get(&arena->extents_muzzy, i);
-		retained = extents_nextents_get(&arena->extents_retained, i);
-		dirty_bytes = extents_nbytes_get(&arena->extents_dirty, i);
-		muzzy_bytes = extents_nbytes_get(&arena->extents_muzzy, i);
-		retained_bytes =
-		    extents_nbytes_get(&arena->extents_retained, i);
+		dirty = eset_nextents_get(&arena->extents_dirty, i);
+		muzzy = eset_nextents_get(&arena->extents_muzzy, i);
+		retained = eset_nextents_get(&arena->extents_retained, i);
+		dirty_bytes = eset_nbytes_get(&arena->extents_dirty, i);
+		muzzy_bytes = eset_nbytes_get(&arena->extents_muzzy, i);
+		retained_bytes = eset_nbytes_get(&arena->extents_retained, i);
 
 		atomic_store_zu(&estats[i].ndirty, dirty, ATOMIC_RELAXED);
 		atomic_store_zu(&estats[i].nmuzzy, muzzy, ATOMIC_RELAXED);
@@ -645,7 +644,7 @@ arena_decay_epoch_advance_helper(arena_decay_t *decay, const nstime_t *time,
 static void
 arena_decay_epoch_advance(tsdn_t *tsdn, arena_t *arena, arena_decay_t *decay,
     eset_t *eset, const nstime_t *time, bool is_background_thread) {
-	size_t current_npages = extents_npages_get(eset);
+	size_t current_npages = eset_npages_get(eset);
 	arena_decay_epoch_advance_helper(decay, time, current_npages);
 
 	size_t npages_limit = arena_decay_backlog_npages_limit(decay);
@@ -720,7 +719,7 @@ arena_maybe_decay(tsdn_t *tsdn, arena_t *arena, arena_decay_t *decay,
 	if (decay_ms <= 0) {
 		if (decay_ms == 0) {
 			arena_decay_to_limit(tsdn, arena, decay, eset, false,
-			    0, extents_npages_get(eset),
+			    0, eset_npages_get(eset),
 			    is_background_thread);
 		}
 		return false;
@@ -760,7 +759,7 @@ arena_maybe_decay(tsdn_t *tsdn, arena_t *arena, arena_decay_t *decay,
 		    is_background_thread);
 	} else if (is_background_thread) {
 		arena_decay_try_purge(tsdn, arena, decay, eset,
-		    extents_npages_get(eset),
+		    eset_npages_get(eset),
 		    arena_decay_backlog_npages_limit(decay),
 		    is_background_thread);
 	}
@@ -907,7 +906,7 @@ arena_decay_stashed(tsdn_t *tsdn, arena_t *arena,
 
 /*
  * npages_limit: Decay at most npages_decay_max pages without violating the
- * invariant: (extents_npages_get(extents) >= npages_limit).  We need an upper
+ * invariant: (eset_npages_get(extents) >= npages_limit).  We need an upper
  * bound on number of pages in order to prevent unbounded growth (namely in
  * stashed), otherwise unbounded new pages could be added to extents during the
  * current decay run, so that the purging thread never finishes.
@@ -950,7 +949,7 @@ arena_decay_impl(tsdn_t *tsdn, arena_t *arena, arena_decay_t *decay,
 	if (all) {
 		malloc_mutex_lock(tsdn, &decay->mtx);
 		arena_decay_to_limit(tsdn, arena, decay, eset, all, 0,
-		    extents_npages_get(eset), is_background_thread);
+		    eset_npages_get(eset), is_background_thread);
 		malloc_mutex_unlock(tsdn, &decay->mtx);
 
 		return false;
@@ -1177,8 +1176,8 @@ arena_destroy(tsd_t *tsd, arena_t *arena) {
 	 * Furthermore, the caller (arena_i_destroy_ctl()) purged all cached
 	 * extents, so only retained extents may remain.
 	 */
-	assert(extents_npages_get(&arena->extents_dirty) == 0);
-	assert(extents_npages_get(&arena->extents_muzzy) == 0);
+	assert(eset_npages_get(&arena->extents_dirty) == 0);
+	assert(eset_npages_get(&arena->extents_muzzy) == 0);
 
 	/* Deallocate retained memory. */
 	arena_destroy_retained(tsd_tsdn(tsd), arena);
diff --git a/src/background_thread.c b/src/background_thread.c
index f4b9ceff..9476a12f 100644
--- a/src/background_thread.c
+++ b/src/background_thread.c
@@ -130,7 +130,7 @@ arena_decay_compute_purge_interval_impl(tsdn_t *tsdn, arena_decay_t *decay,
 
 	uint64_t decay_interval_ns = nstime_ns(&decay->interval);
 	assert(decay_interval_ns > 0);
-	size_t npages = extents_npages_get(eset);
+	size_t npages = eset_npages_get(eset);
 	if (npages == 0) {
 		unsigned i;
 		for (i = 0; i < SMOOTHSTEP_NSTEPS; i++) {
@@ -718,8 +718,8 @@ background_thread_interval_check(tsdn_t *tsdn, arena_t *arena,
 	if (info->npages_to_purge_new > BACKGROUND_THREAD_NPAGES_THRESHOLD) {
 		should_signal = true;
 	} else if (unlikely(background_thread_indefinite_sleep(info)) &&
-	    (extents_npages_get(&arena->extents_dirty) > 0 ||
-	    extents_npages_get(&arena->extents_muzzy) > 0 ||
+	    (eset_npages_get(&arena->extents_dirty) > 0 ||
+	    eset_npages_get(&arena->extents_muzzy) > 0 ||
 	    info->npages_to_purge_new > 0)) {
 		should_signal = true;
 	} else {
diff --git a/src/eset.c b/src/eset.c
index d0b55941..d9457ee9 100644
--- a/src/eset.c
+++ b/src/eset.c
@@ -28,3 +28,18 @@ extent_state_t
 eset_state_get(const eset_t *eset) {
 	return eset->state;
 }
+
+size_t
+eset_npages_get(eset_t *eset) {
+	return atomic_load_zu(&eset->npages, ATOMIC_RELAXED);
+}
+
+size_t
+eset_nextents_get(eset_t *eset, pszind_t pind) {
+	return atomic_load_zu(&eset->nextents[pind], ATOMIC_RELAXED);
+}
+
+size_t
+eset_nbytes_get(eset_t *eset, pszind_t pind) {
+	return atomic_load_zu(&eset->nbytes[pind], ATOMIC_RELAXED);
+}
diff --git a/src/extent.c b/src/extent.c
index af23ca29..81ce308a 100644
--- a/src/extent.c
+++ b/src/extent.c
@@ -252,21 +252,6 @@ extent_hooks_assure_initialized(arena_t *arena,
 /* Generate pairing heap functions. */
 ph_gen(, extent_heap_, extent_heap_t, extent_t, ph_link, extent_snad_comp)
 
-size_t
-extents_npages_get(eset_t *eset) {
-	return atomic_load_zu(&eset->npages, ATOMIC_RELAXED);
-}
-
-size_t
-extents_nextents_get(eset_t *eset, pszind_t pind) {
-	return atomic_load_zu(&eset->nextents[pind], ATOMIC_RELAXED);
-}
-
-size_t
-extents_nbytes_get(eset_t *eset, pszind_t pind) {
-	return atomic_load_zu(&eset->nbytes[pind], ATOMIC_RELAXED);
-}
-
 static void
 extents_stats_add(eset_t *eset, pszind_t pind, size_t sz) {
 	size_t cur = atomic_load_zu(&eset->nextents[pind], ATOMIC_RELAXED);