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-rw-r--r--lib/libsys/stat.28
1 files changed, 6 insertions, 2 deletions
diff --git a/lib/libsys/stat.2 b/lib/libsys/stat.2
index c16af32a340d..bbec876da1fd 100644
--- a/lib/libsys/stat.2
+++ b/lib/libsys/stat.2
@@ -271,10 +271,14 @@ be zero.
.Pp
For file descriptors referencing specific non-file objects,
the field is type-specific.
+.Pp
For POSIX shared memory segments
.Pq see Xr shm_open 2 ,
-the block size is equal to
-the platform page size
+the block size is 512 bytes.
+For older versions of
+.Fx
+.Pq before 15.2 and 16.0
+the block size was equal to the platform page size
.Pq Xr getpagesize 2 .
.El
.Pp