There is a memleak in stat-prefetch reported by valgrind.

 8,140 bytes in 100 blocks are definitely lost in loss record 192 of 222
==17137==    at 0x4A05140: calloc (vg_replace_malloc.c:418)
==17137==    by 0x4C53EA7: __gf_calloc (mem-pool.c:142)
==17137==    by 0xB236717: gf_strdup (mem-pool.h:129)
==17137==    by 0xB2374E0: sp_get_ancestors (stat-prefetch.c:943)
==17137==    by 0xB2375D4: sp_cache_remove_parent_entry (stat-prefetch.c:981)
==17137==    by 0xB2470FD: sp_rename (stat-prefetch.c:3075)
==17137==    by 0xB464128: io_stats_rename (io-stats.c:1888)
==17137==    by 0x62F643D: fuse_rename_resume (fuse-bridge.c:1374)
==17137==    by 0x62EE426: fuse_resolve_and_resume (fuse-resolve.c:739)
==17137==    by 0x62F67C8: fuse_rename (fuse-bridge.c:1422)
==17137==    by 0x62FFE55: fuse_thread_proc (fuse-bridge.c:3220)
==17137==    by 0x3971A0673C: start_thread (in /lib64/libpthread-2.5.so)
==17137== 
==17137== 8,170 bytes in 100 blocks are definitely lost in loss record 193 of 222
==17137==    at 0x4A05140: calloc (vg_replace_malloc.c:418)
==17137==    by 0x4C53EA7: __gf_calloc (mem-pool.c:142)
==17137==    by 0xB236717: gf_strdup (mem-pool.h:129)
==17137==    by 0xB2374E0: sp_get_ancestors (stat-prefetch.c:943)
==17137==    by 0xB2375D4: sp_cache_remove_parent_entry (stat-prefetch.c:981)
==17137==    by 0xB247062: sp_rename (stat-prefetch.c:3066)
==17137==    by 0xB464128: io_stats_rename (io-stats.c:1888)
==17137==    by 0x62F643D: fuse_rename_resume (fuse-bridge.c:1374)
==17137==    by 0x62EE426: fuse_resolve_and_resume (fuse-resolve.c:739)
==17137==    by 0x62F67C8: fuse_rename (fuse-bridge.c:1422)
==17137==    by 0x62FFE55: fuse_thread_proc (fuse-bridge.c:3220)
==17137==    by 0x3971A0673C: start_thread (in /lib64/libpthread-2.5.so)


sp_get_ancestors (char *path, char **parent, char **grand_parent)
{
        int32_t  ret = -1, i = 0;
	char    *cpy = NULL;

        if (!path || !parent || !grand_parent) {
		ret = 0;
                goto out;
    	}

        for (i = 0; i < 2; i++) {
                if (!strcmp (path, "/")) {
			break;
                }

		cpy = gf_strdup (path);
		if (cpy == NULL) {
                        ret = -errno;
                        goto out;
                }

	        path = dirname (cpy);
	        switch (i)
                {
	        case 0:
                        *parent = path;
                        break;
		case 1:
                        *grand_parent = path;
	                break;
	        }
	}

	ret = 0;
out:
        return ret;

In the above function we are not freeing cpy while returning.