fellow_busy: Use the mempool

src/fellow_cache.c

@@ -689,7 +689,7 @@ struct fellow_busy_io_seglist {
 
 // pool for segment memory
 BUDDY_POOL(fbo_segmem, 1);
-//BUDDY_POOL_GET_FUNC(fbo_segmem, static)
+BUDDY_POOL_GET_FUNC(fbo_segmem, static)
 //BUDDY_POOL_AVAIL_FUNC(fbo_segmem, static)
 
 struct fellow_busy_io {
@@ -4263,10 +4263,12 @@ fellow_busy_body_seg_next(struct fellow_busy *fbo)
  *
  * used for body and auxattr
  */
-static size_t fellow_busy_seg_memalloc(const struct fellow_busy *fbo,
+static size_t fellow_busy_seg_memalloc(struct fellow_busy *fbo,
     struct fellow_cache_seg *fcs, int8_t cram)
 {
 	struct fellow_disk_seg *fds;
+	struct buddy_ptr_page mem;
+	size_t sz;
 
 	CHECK_OBJ_NOTNULL(fcs, FELLOW_CACHE_SEG_MAGIC);
 	fds = fcs->disk_seg;
@@ -4286,8 +4288,22 @@ static size_t fellow_busy_seg_memalloc(const struct fellow_busy *fbo,
 		cram = buddy_cramlimit_bits(fds->seg.size,
 		    fbo->fc->tune->cram, MIN_FELLOW_BITS);
 	}
-	fcs->alloc = buddy_alloc1_ptr_extent_wait(fbo->fc->membuddy,
-	    FEP_SPC, fds->seg.size, cram);
+
+	mem = buddy_get_next_ptr_page(
+	    fbo_segmem_get(fbo->segmem, fbo->fc->tune));
+	AN(mem.ptr);
+	sz = (size_t)1 << mem.bits;
+	if (sz >= fds->seg.size) {
+		fcs->alloc.ptr = mem.ptr;
+		fcs->alloc.size = sz;
+		buddy_trim1_ptr_extent(fbo->fc->membuddy, &fcs->alloc,
+		    fds->seg.size);
+	}
+	else {
+		buddy_return1_ptr_page(fbo->fc->membuddy, &mem);
+		fcs->alloc = buddy_alloc1_ptr_extent_wait(fbo->fc->membuddy,
+		    FEP_SPC, fds->seg.size, cram);
+	}
 
 	if (fcs->alloc.ptr == NULL)
 		return (0);