[svn-r6387] Purpose:

    Bug Fix

Description:
    Metadata cache in parallel I/O can cause hangs in applications which
    perform independent I/O on chunked datasets, because the metadata cache
    can attempt to flush out dirty metadata from only a single process, instead
    of collectively from all processes.

Solution:
    Pass a dataset transfer property list down from every API function which
    could possibly trigger metadata I/O.

    Then, split the metadata cache into two sets of entries to allow dirty
    metadata to be set aside when a hash table collision occurs during
    independent I/O.

Platforms tested:
    Tested h5committest {arabica (fortran), eirene (fortran, C++)
        modi4 (parallel, fortran)}

    FreeBSD 4.7 (sleipnir) serial & parallel

Misc. update:
    Updated release_docs/RELEASE

1 files changed, 8 insertions, 9 deletions

diff --git a/src/H5Gpkg.h b/src/H5Gpkg.h
index b058ea3..5070fcc 100644
--- a/src/H5Gpkg.h
+++ b/src/H5Gpkg.h
@@ -34,7 +34,6 @@
 typedef struct H5G_node_t {
     H5AC_info_t cache_info; /* Information for H5AC cache functions, _must_ be */
                             /* first field in structure */
-    hbool_t     dirty;                  /*has cache been modified?           */
     int         nsyms;                  /*number of symbols                  */
     H5G_entry_t *entry;                 /*array of symbol table entries      */
 } H5G_node_t;
@@ -134,13 +133,13 @@ H5_DLLVAR const H5AC_class_t H5AC_SNODE[1];
  * functions that understand names are exported to the rest of
  * the library and appear in H5Gprivate.h.
  */
-H5_DLL herr_t H5G_stab_create(H5F_t *f, size_t size_hint,
+H5_DLL herr_t H5G_stab_create(H5F_t *f, hid_t dxpl_id, size_t size_hint,
 			       H5G_entry_t *ent/*out*/);
 H5_DLL herr_t H5G_stab_find(H5G_entry_t *grp_ent, const char *name,
-			     H5G_entry_t *obj_ent/*out*/);
+			     H5G_entry_t *obj_ent/*out*/, hid_t dxpl_id);
 H5_DLL herr_t H5G_stab_insert(H5G_entry_t *grp_ent, const char *name,
-			       H5G_entry_t *obj_ent);
-H5_DLL herr_t H5G_stab_remove(H5G_entry_t *grp_ent, const char *name);
+			       H5G_entry_t *obj_ent, hid_t dxpl_id);
+H5_DLL herr_t H5G_stab_remove(H5G_entry_t *grp_ent, const char *name, hid_t dxpl_id);
 
 /*
  * Functions that understand symbol table entries.
@@ -151,12 +150,12 @@ H5_DLL herr_t H5G_ent_encode_vec(H5F_t *f, uint8_t **pp,
 				  const H5G_entry_t *ent, int n);
 
 /* Functions that understand symbol table nodes */
-H5_DLL H5B_iterate_t H5G_node_iterate (H5F_t *f, void UNUSED *_lt_key, haddr_t addr,
+H5_DLL H5B_iterate_t H5G_node_iterate (H5F_t *f, hid_t dxpl_id, void UNUSED *_lt_key, haddr_t addr,
 		     void UNUSED *_rt_key, void *_udata);
-H5_DLL H5B_iterate_t H5G_node_sumup(H5F_t *f, void UNUSED *_lt_key, haddr_t addr,
+H5_DLL H5B_iterate_t H5G_node_sumup(H5F_t *f, hid_t dxpl_id, void UNUSED *_lt_key, haddr_t addr,
 		     void UNUSED *_rt_key, void *_udata);
-H5_DLL H5B_iterate_t H5G_node_name(H5F_t *f, void UNUSED *_lt_key, haddr_t addr,
+H5_DLL H5B_iterate_t H5G_node_name(H5F_t *f, hid_t dxpl_id, void UNUSED *_lt_key, haddr_t addr,
 		     void UNUSED *_rt_key, void *_udata);
-H5_DLL H5B_iterate_t H5G_node_type(H5F_t *f, void UNUSED *_lt_key, haddr_t addr,
+H5_DLL H5B_iterate_t H5G_node_type(H5F_t *f, hid_t dxpl_id, void UNUSED *_lt_key, haddr_t addr,
 		     void UNUSED *_rt_key, void *_udata);
 #endif