Immediate values provide a way to use dynamic code patching to update variables
sitting within the instruction stream. It saves caches lines normally used by
static read mostly variables.
Signed-off-by: Mathieu Desnoyers <[email protected]>
CC: Adrian Bunk <[email protected]>
CC: Andi Kleen <[email protected]>
---
arch/alpha/Kconfig | 6 ++++++
arch/arm/Kconfig | 6 ++++++
arch/arm26/Kconfig | 6 ++++++
arch/avr32/Kconfig.debug | 7 +++++++
arch/cris/Kconfig | 6 ++++++
arch/frv/Kconfig | 6 ++++++
arch/h8300/Kconfig | 6 ++++++
arch/i386/Kconfig | 2 ++
arch/ia64/Kconfig | 3 +++
arch/m32r/Kconfig | 6 ++++++
arch/m68k/Kconfig | 6 ++++++
arch/m68knommu/Kconfig | 6 ++++++
arch/mips/Kconfig | 6 ++++++
arch/parisc/Kconfig | 6 ++++++
arch/powerpc/Kconfig | 3 +++
arch/ppc/Kconfig | 6 ++++++
arch/s390/Kconfig | 2 ++
arch/sh/Kconfig | 6 ++++++
arch/sh64/Kconfig | 6 ++++++
arch/sparc/Kconfig | 2 ++
arch/sparc64/Kconfig | 3 +++
arch/um/Kconfig | 6 ++++++
arch/v850/Kconfig | 6 ++++++
arch/x86_64/Kconfig | 3 +++
arch/xtensa/Kconfig | 6 ++++++
kernel/Kconfig.immediate | 11 +++++++++++
26 files changed, 138 insertions(+)
Index: linux-2.6-lttng/arch/alpha/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/alpha/Kconfig 2007-07-13 14:17:59.000000000 -0400
+++ linux-2.6-lttng/arch/alpha/Kconfig 2007-07-13 14:33:51.000000000 -0400
@@ -653,6 +653,12 @@
source "arch/alpha/oprofile/Kconfig"
+menu "Instrumentation Support"
+
+source "kernel/Kconfig.immediate"
+
+endmenu
+
source "arch/alpha/Kconfig.debug"
# DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
Index: linux-2.6-lttng/arch/arm/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/arm/Kconfig 2007-07-13 14:17:59.000000000 -0400
+++ linux-2.6-lttng/arch/arm/Kconfig 2007-07-13 14:33:51.000000000 -0400
@@ -1046,6 +1046,12 @@
source "arch/arm/oprofile/Kconfig"
+menu "Instrumentation Support"
+
+source "kernel/Kconfig.immediate"
+
+endmenu
+
source "arch/arm/Kconfig.debug"
source "security/Kconfig"
Index: linux-2.6-lttng/arch/arm26/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/arm26/Kconfig 2007-07-13 14:17:59.000000000 -0400
+++ linux-2.6-lttng/arch/arm26/Kconfig 2007-07-13 14:33:51.000000000 -0400
@@ -244,6 +244,12 @@
source "drivers/usb/Kconfig"
+menu "Instrumentation Support"
+
+source "kernel/Kconfig.immediate"
+
+endmenu
+
source "arch/arm26/Kconfig.debug"
source "security/Kconfig"
Index: linux-2.6-lttng/arch/cris/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/cris/Kconfig 2007-07-13 14:17:59.000000000 -0400
+++ linux-2.6-lttng/arch/cris/Kconfig 2007-07-13 14:33:51.000000000 -0400
@@ -198,6 +198,12 @@
source "drivers/usb/Kconfig"
+menu "Instrumentation Support"
+
+source "kernel/Kconfig.immediate"
+
+endmenu
+
source "arch/cris/Kconfig.debug"
source "security/Kconfig"
Index: linux-2.6-lttng/arch/frv/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/frv/Kconfig 2007-07-13 14:17:59.000000000 -0400
+++ linux-2.6-lttng/arch/frv/Kconfig 2007-07-13 14:33:51.000000000 -0400
@@ -375,6 +375,12 @@
source "fs/Kconfig"
+menu "Instrumentation Support"
+
+source "kernel/Kconfig.immediate"
+
+endmenu
+
source "arch/frv/Kconfig.debug"
source "security/Kconfig"
Index: linux-2.6-lttng/arch/h8300/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/h8300/Kconfig 2007-07-13 14:17:59.000000000 -0400
+++ linux-2.6-lttng/arch/h8300/Kconfig 2007-07-13 14:33:51.000000000 -0400
@@ -223,6 +223,12 @@
source "fs/Kconfig"
+menu "Instrumentation Support"
+
+source "kernel/Kconfig.immediate"
+
+endmenu
+
source "arch/h8300/Kconfig.debug"
source "security/Kconfig"
Index: linux-2.6-lttng/arch/i386/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/i386/Kconfig 2007-07-13 14:17:59.000000000 -0400
+++ linux-2.6-lttng/arch/i386/Kconfig 2007-07-13 14:33:51.000000000 -0400
@@ -1249,6 +1249,8 @@
for kernel debugging, non-intrusive instrumentation and testing.
If in doubt, say "N".
+source "kernel/Kconfig.immediate"
+
endif # INSTRUMENTATION
source "arch/i386/Kconfig.debug"
Index: linux-2.6-lttng/arch/ia64/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/ia64/Kconfig 2007-07-13 14:17:59.000000000 -0400
+++ linux-2.6-lttng/arch/ia64/Kconfig 2007-07-13 14:33:51.000000000 -0400
@@ -593,6 +593,9 @@
a probepoint and specifies the callback. Kprobes is useful
for kernel debugging, non-intrusive instrumentation and testing.
If in doubt, say "N".
+
+source "kernel/Kconfig.immediate"
+
endmenu
source "arch/ia64/Kconfig.debug"
Index: linux-2.6-lttng/arch/m32r/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/m32r/Kconfig 2007-07-13 14:18:00.000000000 -0400
+++ linux-2.6-lttng/arch/m32r/Kconfig 2007-07-13 14:33:51.000000000 -0400
@@ -408,6 +408,12 @@
source "arch/m32r/oprofile/Kconfig"
+menu "Instrumentation Support"
+
+source "kernel/Kconfig.immediate"
+
+endmenu
+
source "arch/m32r/Kconfig.debug"
source "security/Kconfig"
Index: linux-2.6-lttng/arch/m68k/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/m68k/Kconfig 2007-07-13 14:18:00.000000000 -0400
+++ linux-2.6-lttng/arch/m68k/Kconfig 2007-07-13 14:33:51.000000000 -0400
@@ -676,6 +676,12 @@
source "fs/Kconfig"
+menu "Instrumentation Support"
+
+source "kernel/Kconfig.immediate"
+
+endmenu
+
source "arch/m68k/Kconfig.debug"
source "security/Kconfig"
Index: linux-2.6-lttng/arch/m68knommu/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/m68knommu/Kconfig 2007-07-13 14:18:00.000000000 -0400
+++ linux-2.6-lttng/arch/m68knommu/Kconfig 2007-07-13 14:33:51.000000000 -0400
@@ -668,6 +668,12 @@
source "fs/Kconfig"
+menu "Instrumentation Support"
+
+source "kernel/Kconfig.immediate"
+
+endmenu
+
source "arch/m68knommu/Kconfig.debug"
source "security/Kconfig"
Index: linux-2.6-lttng/arch/mips/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/mips/Kconfig 2007-07-13 14:18:00.000000000 -0400
+++ linux-2.6-lttng/arch/mips/Kconfig 2007-07-13 14:33:51.000000000 -0400
@@ -1946,6 +1946,12 @@
source "arch/mips/oprofile/Kconfig"
+menu "Instrumentation Support"
+
+source "kernel/Kconfig.immediate"
+
+endmenu
+
source "arch/mips/Kconfig.debug"
source "security/Kconfig"
Index: linux-2.6-lttng/arch/parisc/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/parisc/Kconfig 2007-07-13 14:18:00.000000000 -0400
+++ linux-2.6-lttng/arch/parisc/Kconfig 2007-07-13 14:33:51.000000000 -0400
@@ -269,6 +269,12 @@
source "arch/parisc/oprofile/Kconfig"
+menu "Instrumentation Support"
+
+source "kernel/Kconfig.immediate"
+
+endmenu
+
source "arch/parisc/Kconfig.debug"
source "security/Kconfig"
Index: linux-2.6-lttng/arch/powerpc/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/powerpc/Kconfig 2007-07-13 14:18:00.000000000 -0400
+++ linux-2.6-lttng/arch/powerpc/Kconfig 2007-07-13 14:33:51.000000000 -0400
@@ -655,6 +655,9 @@
a probepoint and specifies the callback. Kprobes is useful
for kernel debugging, non-intrusive instrumentation and testing.
If in doubt, say "N".
+
+source "kernel/Kconfig.immediate"
+
endmenu
source "arch/powerpc/Kconfig.debug"
Index: linux-2.6-lttng/arch/ppc/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/ppc/Kconfig 2007-07-13 14:18:00.000000000 -0400
+++ linux-2.6-lttng/arch/ppc/Kconfig 2007-07-13 14:33:51.000000000 -0400
@@ -1451,8 +1451,14 @@
source "lib/Kconfig"
+menu "Instrumentation Support"
+
source "arch/powerpc/oprofile/Kconfig"
+source "kernel/Kconfig.immediate"
+
+endmenu
+
source "arch/ppc/Kconfig.debug"
source "security/Kconfig"
Index: linux-2.6-lttng/arch/s390/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/s390/Kconfig 2007-07-13 14:18:00.000000000 -0400
+++ linux-2.6-lttng/arch/s390/Kconfig 2007-07-13 14:33:51.000000000 -0400
@@ -547,6 +547,8 @@
for kernel debugging, non-intrusive instrumentation and testing.
If in doubt, say "N".
+source "kernel/Kconfig.immediate"
+
endmenu
source "arch/s390/Kconfig.debug"
Index: linux-2.6-lttng/arch/sh/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/sh/Kconfig 2007-07-13 14:18:00.000000000 -0400
+++ linux-2.6-lttng/arch/sh/Kconfig 2007-07-13 14:33:51.000000000 -0400
@@ -721,6 +721,12 @@
source "arch/sh/oprofile/Kconfig"
+menu "Instrumentation Support"
+
+source "kernel/Kconfig.immediate"
+
+endmenu
+
source "arch/sh/Kconfig.debug"
source "security/Kconfig"
Index: linux-2.6-lttng/arch/sh64/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/sh64/Kconfig 2007-07-13 14:18:00.000000000 -0400
+++ linux-2.6-lttng/arch/sh64/Kconfig 2007-07-13 14:33:51.000000000 -0400
@@ -284,6 +284,12 @@
source "arch/sh64/oprofile/Kconfig"
+menu "Instrumentation Support"
+
+source "kernel/Kconfig.immediate"
+
+endmenu
+
source "arch/sh64/Kconfig.debug"
source "security/Kconfig"
Index: linux-2.6-lttng/arch/sparc/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/sparc/Kconfig 2007-07-13 14:18:00.000000000 -0400
+++ linux-2.6-lttng/arch/sparc/Kconfig 2007-07-13 14:33:51.000000000 -0400
@@ -313,6 +313,8 @@
source "arch/sparc/oprofile/Kconfig"
+source "kernel/Kconfig.immediate"
+
endmenu
source "arch/sparc/Kconfig.debug"
Index: linux-2.6-lttng/arch/sparc64/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/sparc64/Kconfig 2007-07-13 14:18:00.000000000 -0400
+++ linux-2.6-lttng/arch/sparc64/Kconfig 2007-07-13 14:33:51.000000000 -0400
@@ -451,6 +451,9 @@
a probepoint and specifies the callback. Kprobes is useful
for kernel debugging, non-intrusive instrumentation and testing.
If in doubt, say "N".
+
+source "kernel/Kconfig.immediate"
+
endmenu
source "arch/sparc64/Kconfig.debug"
Index: linux-2.6-lttng/arch/um/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/um/Kconfig 2007-07-13 14:18:00.000000000 -0400
+++ linux-2.6-lttng/arch/um/Kconfig 2007-07-13 14:33:51.000000000 -0400
@@ -335,4 +335,10 @@
bool
default n
+menu "Instrumentation Support"
+
+source "kernel/Kconfig.immediate"
+
+endmenu
+
source "arch/um/Kconfig.debug"
Index: linux-2.6-lttng/arch/v850/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/v850/Kconfig 2007-07-13 14:18:00.000000000 -0400
+++ linux-2.6-lttng/arch/v850/Kconfig 2007-07-13 14:33:51.000000000 -0400
@@ -331,6 +331,12 @@
source "drivers/usb/Kconfig"
+menu "Instrumentation Support"
+
+source "kernel/Kconfig.immediate"
+
+endmenu
+
source "arch/v850/Kconfig.debug"
source "security/Kconfig"
Index: linux-2.6-lttng/arch/x86_64/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/x86_64/Kconfig 2007-07-13 14:18:00.000000000 -0400
+++ linux-2.6-lttng/arch/x86_64/Kconfig 2007-07-13 14:33:51.000000000 -0400
@@ -842,6 +842,9 @@
a probepoint and specifies the callback. Kprobes is useful
for kernel debugging, non-intrusive instrumentation and testing.
If in doubt, say "N".
+
+source "kernel/Kconfig.immediate"
+
endmenu
source "arch/x86_64/Kconfig.debug"
Index: linux-2.6-lttng/arch/xtensa/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/xtensa/Kconfig 2007-07-13 14:18:00.000000000 -0400
+++ linux-2.6-lttng/arch/xtensa/Kconfig 2007-07-13 14:33:51.000000000 -0400
@@ -251,6 +251,12 @@
provide one yourself.
endmenu
+menu "Instrumentation Support"
+
+source "kernel/Kconfig.immediate"
+
+endmenu
+
source "arch/xtensa/Kconfig.debug"
source "security/Kconfig"
Index: linux-2.6-lttng/kernel/Kconfig.immediate
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6-lttng/kernel/Kconfig.immediate 2007-07-13 14:33:47.000000000 -0400
@@ -0,0 +1,11 @@
+# Immediate values configuration
+
+config IMMEDIATE
+ bool "Enable immediate values"
+ depends on X86_32 || PPC
+ default y if !EMBEDDED
+ help
+ Immediate values are used as read mostly variables that are rarely
+ updated. They use code patching to modify the values inscribed in the
+ instruction stream. It provides a way to save precious cache lines
+ that would otherwise have to be used by these variables.
Index: linux-2.6-lttng/arch/avr32/Kconfig.debug
===================================================================
--- linux-2.6-lttng.orig/arch/avr32/Kconfig.debug 2007-07-13 14:18:00.000000000 -0400
+++ linux-2.6-lttng/arch/avr32/Kconfig.debug 2007-07-13 14:33:51.000000000 -0400
@@ -6,6 +6,9 @@
source "lib/Kconfig.debug"
+menu "Instrumentation Support"
+ depends on EXPERIMENTAL
+
config KPROBES
bool "Kprobes"
depends on DEBUG_KERNEL
@@ -16,4 +19,8 @@
for kernel debugging, non-intrusive instrumentation and testing.
If in doubt, say "N".
+source "kernel/Kconfig.immediate"
+
+endmenu
+
endmenu
--
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
