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Message-ID: <20070716003234.GA26411@Krystal> Date: Sun, 15 Jul 2007 20:32:34 -0400 From: Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca> To: akpm@...ux-foundation.org, linux-kernel@...r.kernel.org Cc: Adrian Bunk <bunk@...sta.de>, Andi Kleen <andi@...stfloor.org>, Alexey Dobriyan <adobriyan@...il.com>, Christoph Hellwig <hch@...radead.org> Subject: Re: [patch 4/8] Immediate Value - Add kconfig menus Should be dropped, replaced by : immediate-values-kconfig-embedded.patch * Mathieu Desnoyers (mathieu.desnoyers@...ymtl.ca) wrote: > 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 <mathieu.desnoyers@...ymtl.ca> > CC: Adrian Bunk <bunk@...sta.de> > CC: Andi Kleen <andi@...stfloor.org> > --- > > 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 majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > -- 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 majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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