ompio: correctly handle zero f_cc_size in mca_io_ompio_simple_grouping

ggouaillardet · ggouaillardet · commit 15c629e09e6d · 2015-12-08T17:14:14.000+09:00
(cherry picked from commit open-mpi/ompi@59a361b)
diff --git a/ompi/mca/io/ompio/io_ompio_file_set_view.c b/ompi/mca/io/ompio/io_ompio_file_set_view.c
@@ -323,7 +323,7 @@ int mca_io_ompio_simple_grouping(mca_io_ompio_file_t *fh,
         stripe_size = OMPIO_DEFAULT_STRIPE_SIZE;
     }
 
-    if ( stripe_size > fh->f_cc_size ) {
+    if ( 0 != fh->f_cc_size && stripe_size > fh->f_cc_size ) {
         group_size  = (((int)stripe_size/(int)fh->f_cc_size) > fh->f_size ) ? fh->f_size : ((int)stripe_size/(int)fh->f_cc_size);
         *num_groups = fh->f_size / group_size;
     }

Original file line number	Diff line number	Diff line change
`@@ -323,7 +323,7 @@ int mca_io_ompio_simple_grouping(mca_io_ompio_file_t *fh,`
`323`	`323`	`stripe_size = OMPIO_DEFAULT_STRIPE_SIZE;`
`324`	`324`	`}`
`325`	`325`
`326`		`- if ( stripe_size > fh->f_cc_size ) {`
	`326`	`+ if ( 0 != fh->f_cc_size && stripe_size > fh->f_cc_size ) {`
`327`	`327`	`group_size = (((int)stripe_size/(int)fh->f_cc_size) > fh->f_size ) ? fh->f_size : ((int)stripe_size/(int)fh->f_cc_size);`
`328`	`328`	`*num_groups = fh->f_size / group_size;`
`329`	`329`	`}`