diff --git a/gdb-6.3-readnever-20050907.patch b/gdb-6.3-readnever-20050907.patch
index 4ce26c0..ef0d18f 100644
--- a/gdb-6.3-readnever-20050907.patch
+++ b/gdb-6.3-readnever-20050907.patch
@@ -94,3 +94,14 @@ Index: gdb-7.99.90.20170420/gdb/top.h
  
  /* Perform _initialize initialization.  */
  extern void gdb_init (char *);
+--- gdb-8.0.1/gdb/gcore.in-orig	2017-06-04 17:51:26.000000000 +0200
++++ gdb-8.0.1/gdb/gcore.in	2017-09-28 19:46:49.335407827 +0200
+@@ -85,7 +85,7 @@ for pid in $*
+ do
+ 	# `</dev/null' to avoid touching interactive terminal if it is
+ 	# available but not accessible as GDB would get stopped on SIGTTIN.
+-	$binary_path/@GDB_TRANSFORM_NAME@ </dev/null --nx --batch \
++	$binary_path/@GDB_TRANSFORM_NAME@ </dev/null --nx --batch --readnever \
+ 	    -ex "set pagination off" -ex "set height 0" -ex "set width 0" \
+ 	    -ex "attach $pid" -ex "gcore $name.$pid" -ex detach -ex quit
+ 
diff --git a/gdb.spec b/gdb.spec
index ffa1c3b..ddd183b 100644
--- a/gdb.spec
+++ b/gdb.spec
@@ -26,7 +26,7 @@ Version: 8.0.1
 
 # The release always contains a leading reserved number, start it at 1.
 # `upstream' is not a part of `name' to stay fully rpm dependencies compatible for the testing.
-Release: 27%{?dist}
+Release: 28%{?dist}
 
 License: GPLv3+ and GPLv3+ with exceptions and GPLv2+ and GPLv2+ with exceptions and GPL+ and LGPLv2+ and LGPLv3+ and BSD and Public Domain and GFDL
 Group: Development/Debuggers
@@ -1715,7 +1715,10 @@ then
 fi
 
 %changelog
-* Tue Sep 26 2017 Troy Dawson <tdawson@redhat.com> - 8.0.1-27.fc28
+* Thu Sep 28 2017 Jan Kratochvil <jan.kratochvil@redhat.com> - 8.0.1-28.fc26
+- Performance fix of gcore to use --readnever (for RH BZ 1493675).
+
+* Tue Sep 26 2017 Troy Dawson <tdawson@redhat.com> - 8.0.1-27.fc26
 - Cleanup spec file conditionals
 
 * Tue Sep 12 2017 Jan Kratochvil <jan.kratochvil@redhat.com> - 8.0.1-26.fc26