3 files changed, 8 insertions, 3 deletions
diff --git a/Changes b/Changes
index e566dd3..8dfdf53 100644
--- a/Changes
+++ b/Changes
@@ -5,5 +5,6 @@ TODO: maybe add mincore support? available on at leats darwin, solaris, linux, f
 1.0
 	- added msync, mtouch support (untested).
         - fixed custom support.
+        - use a more robust feed-add detection method.
 	- "outbundled" from IO::AIO.
 
diff --git a/eio.c b/eio.c
index 8ea6b51..be7ac60 100644
--- a/eio.c
+++ b/eio.c
@@ -606,12 +606,12 @@ static void grp_try_feed (eio_req *grp)
 {
   while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
     {
-      int old_len = grp->size;
+      grp->flags &= ~EIO_FLAG_GROUPADD;
 
       EIO_FEED (grp);
 
       /* stop if no progress has been made */
-      if (old_len == grp->size)
+      if (!(grp->flags & EIO_FLAG_GROUPADD))
         {
           grp->feed = 0;
           break;
@@ -1483,6 +1483,8 @@ void eio_grp_add (eio_req *grp, eio_req *req)
 {
   assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
 
+  grp->flags |= EIO_FLAG_GROUPADD;
+
   ++grp->size;
   req->grp = grp;
 
diff --git a/eio.h b/eio.h
index 3c9eac7..47e8df7 100644
--- a/eio.h
+++ b/eio.h
@@ -112,10 +112,12 @@ struct eio_req
   eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */
 };
 
+/* _private_ flags */
 enum {
   EIO_FLAG_CANCELLED = 0x01, /* request was cancelled */
   EIO_FLAG_PTR1_FREE = 0x02, /* need to free(ptr1) */
-  EIO_FLAG_PTR2_FREE = 0x04  /* need to free(ptr2) */
+  EIO_FLAG_PTR2_FREE = 0x04, /* need to free(ptr2) */
+  EIO_FLAG_GROUPADD  = 0x08  /* some request was added to the group */
 };
 
 enum {