From 39743889aaf76725152f16aa90ca3c45f6d52da3 Mon Sep 17 00:00:00 2001 From: Christoph Lameter Date: Sun, 8 Jan 2006 01:00:51 -0800 Subject: [PATCH] Swap Migration V5: sys_migrate_pages interface sys_migrate_pages implementation using swap based page migration This is the original API proposed by Ray Bryant in his posts during the first half of 2005 on linux-mm@kvack.org and linux-kernel@vger.kernel.org. The intent of sys_migrate is to migrate memory of a process. A process may have migrated to another node. Memory was allocated optimally for the prior context. sys_migrate_pages allows to shift the memory to the new node. sys_migrate_pages is also useful if the processes available memory nodes have changed through cpuset operations to manually move the processes memory. Paul Jackson is working on an automated mechanism that will allow an automatic migration if the cpuset of a process is changed. However, a user may decide to manually control the migration. This implementation is put into the policy layer since it uses concepts and functions that are also needed for mbind and friends. The patch also provides a do_migrate_pages function that may be useful for cpusets to automatically move memory. sys_migrate_pages does not modify policies in contrast to Ray's implementation. The current code here is based on the swap based page migration capability and thus is not able to preserve the physical layout relative to it containing nodeset (which may be a cpuset). When direct page migration becomes available then the implementation needs to be changed to do a isomorphic move of pages between different nodesets. The current implementation simply evicts all pages in source nodeset that are not in the target nodeset. Patch supports ia64, i386 and x86_64. Signed-off-by: Christoph Lameter Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/i386/kernel/syscall_table.S | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/i386') diff --git a/arch/i386/kernel/syscall_table.S b/arch/i386/kernel/syscall_table.S index f7ba4acc20ec..6ff3e5243226 100644 --- a/arch/i386/kernel/syscall_table.S +++ b/arch/i386/kernel/syscall_table.S @@ -293,3 +293,4 @@ ENTRY(sys_call_table) .long sys_inotify_init .long sys_inotify_add_watch .long sys_inotify_rm_watch + .long sys_migrate_pages -- cgit v1.2.2 From 22fc6eccbf4ce4eb6265e6ada7b50a7b9cc57d05 Mon Sep 17 00:00:00 2001 From: Ravikiran G Thirumalai Date: Sun, 8 Jan 2006 01:01:27 -0800 Subject: [PATCH] Change maxaligned_in_smp alignemnt macros to internodealigned_in_smp macros ____cacheline_maxaligned_in_smp is currently used to align critical structures and avoid false sharing. It uses per-arch L1_CACHE_SHIFT_MAX and people find L1_CACHE_SHIFT_MAX useless. However, we have been using ____cacheline_maxaligned_in_smp to align structures on the internode cacheline size. As per Andi's suggestion, following patch kills ____cacheline_maxaligned_in_smp and introduces INTERNODE_CACHE_SHIFT, which defaults to L1_CACHE_SHIFT for all arches. Arches needing L3/Internode cacheline alignment can define INTERNODE_CACHE_SHIFT in the arch asm/cache.h. Patch replaces ____cacheline_maxaligned_in_smp with ____cacheline_internodealigned_in_smp With this patch, L1_CACHE_SHIFT_MAX can be killed Signed-off-by: Ravikiran Thirumalai Signed-off-by: Shai Fultheim Signed-off-by: Andi Kleen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/i386/kernel/init_task.c | 2 +- arch/i386/kernel/irq.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) (limited to 'arch/i386') diff --git a/arch/i386/kernel/init_task.c b/arch/i386/kernel/init_task.c index 9caa8e8db80c..cff95d10a4d8 100644 --- a/arch/i386/kernel/init_task.c +++ b/arch/i386/kernel/init_task.c @@ -42,5 +42,5 @@ EXPORT_SYMBOL(init_task); * per-CPU TSS segments. Threads are completely 'soft' on Linux, * no more per-task TSS's. */ -DEFINE_PER_CPU(struct tss_struct, init_tss) ____cacheline_maxaligned_in_smp = INIT_TSS; +DEFINE_PER_CPU(struct tss_struct, init_tss) ____cacheline_internodealigned_in_smp = INIT_TSS; diff --git a/arch/i386/kernel/irq.c b/arch/i386/kernel/irq.c index 1a201a932865..f3a9c78c4a24 100644 --- a/arch/i386/kernel/irq.c +++ b/arch/i386/kernel/irq.c @@ -19,7 +19,7 @@ #include #include -DEFINE_PER_CPU(irq_cpustat_t, irq_stat) ____cacheline_maxaligned_in_smp; +DEFINE_PER_CPU(irq_cpustat_t, irq_stat) ____cacheline_internodealigned_in_smp; EXPORT_PER_CPU_SYMBOL(irq_stat); #ifndef CONFIG_X86_LOCAL_APIC -- cgit v1.2.2 From 2a10e0b28b196051ae71829e5b989cba00513289 Mon Sep 17 00:00:00 2001 From: Adrian Bunk Date: Sun, 8 Jan 2006 01:02:15 -0800 Subject: [PATCH] move rtc_interrupt() prototype to rtc.h This patch moves the rtc_interrupt() prototype to rtc.h and removes the prototypes from C files. It also renames static rtc_interrupt() functions in arch/arm/mach-integrator/time.c and arch/sh64/kernel/time.c to avoid compile problems. Signed-off-by: Adrian Bunk Signed-off-by: Paul Gortmaker Acked-by: Paul Mundt Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/i386/kernel/time_hpet.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'arch/i386') diff --git a/arch/i386/kernel/time_hpet.c b/arch/i386/kernel/time_hpet.c index 9caeaa315cd7..a529f0cdce17 100644 --- a/arch/i386/kernel/time_hpet.c +++ b/arch/i386/kernel/time_hpet.c @@ -259,8 +259,6 @@ __setup("hpet=", hpet_setup); #include #include -extern irqreturn_t rtc_interrupt(int irq, void *dev_id, struct pt_regs *regs); - #define DEFAULT_RTC_INT_FREQ 64 #define RTC_NUM_INTS 1 -- cgit v1.2.2 From a1365647022eb05a5993f270a78e9bef3bf554eb Mon Sep 17 00:00:00 2001 From: Andrew Morton Date: Sun, 8 Jan 2006 01:04:09 -0800 Subject: [PATCH] remove gcc-2 checks Remove various things which were checking for gcc-1.x and gcc-2.x compilers. From: Adrian Bunk Some documentation updates and removes some code paths for gcc < 3.2. Acked-by: Russell King Signed-off-by: Adrian Bunk Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/i386/Kconfig | 4 ---- arch/i386/Makefile | 5 +---- arch/i386/Makefile.cpu | 10 +++++----- 3 files changed, 6 insertions(+), 13 deletions(-) (limited to 'arch/i386') diff --git a/arch/i386/Kconfig b/arch/i386/Kconfig index 968fabd8723f..486449e9e710 100644 --- a/arch/i386/Kconfig +++ b/arch/i386/Kconfig @@ -630,10 +630,6 @@ config REGPARM and passes the first three arguments of a function call in registers. This will probably break binary only modules. - This feature is only enabled for gcc-3.0 and later - earlier compilers - generate incorrect output with certain kernel constructs when - -mregparm=3 is used. - config SECCOMP bool "Enable seccomp to safely compute untrusted bytecode" depends on PROC_FS diff --git a/arch/i386/Makefile b/arch/i386/Makefile index d121ea18460f..b84119f9cc63 100644 --- a/arch/i386/Makefile +++ b/arch/i386/Makefile @@ -37,10 +37,7 @@ CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2) # CPU-specific tuning. Anything which can be shared with UML should go here. include $(srctree)/arch/i386/Makefile.cpu -# -mregparm=3 works ok on gcc-3.0 and later -# -GCC_VERSION := $(call cc-version) -cflags-$(CONFIG_REGPARM) += $(shell if [ $(GCC_VERSION) -ge 0300 ] ; then echo "-mregparm=3"; fi ;) +cflags-$(CONFIG_REGPARM) += -mregparm=3 # Disable unit-at-a-time mode, it makes gcc use a lot more stack # due to the lack of sharing of stacklots. diff --git a/arch/i386/Makefile.cpu b/arch/i386/Makefile.cpu index 8e51456df23d..dcd936ef45db 100644 --- a/arch/i386/Makefile.cpu +++ b/arch/i386/Makefile.cpu @@ -1,7 +1,7 @@ # CPU tuning section - shared with UML. # Must change only cflags-y (or [yn]), not CFLAGS! That makes a difference for UML. -#-mtune exists since gcc 3.4, and some -mcpu flavors didn't exist in gcc 2.95. +#-mtune exists since gcc 3.4 HAS_MTUNE := $(call cc-option-yn, -mtune=i386) ifeq ($(HAS_MTUNE),y) tune = $(call cc-option,-mtune=$(1),) @@ -14,7 +14,7 @@ cflags-$(CONFIG_M386) += -march=i386 cflags-$(CONFIG_M486) += -march=i486 cflags-$(CONFIG_M586) += -march=i586 cflags-$(CONFIG_M586TSC) += -march=i586 -cflags-$(CONFIG_M586MMX) += $(call cc-option,-march=pentium-mmx,-march=i586) +cflags-$(CONFIG_M586MMX) += -march=pentium-mmx cflags-$(CONFIG_M686) += -march=i686 cflags-$(CONFIG_MPENTIUMII) += -march=i686 $(call tune,pentium2) cflags-$(CONFIG_MPENTIUMIII) += -march=i686 $(call tune,pentium3) @@ -23,8 +23,8 @@ cflags-$(CONFIG_MPENTIUM4) += -march=i686 $(call tune,pentium4) cflags-$(CONFIG_MK6) += -march=k6 # Please note, that patches that add -march=athlon-xp and friends are pointless. # They make zero difference whatsosever to performance at this time. -cflags-$(CONFIG_MK7) += $(call cc-option,-march=athlon,-march=i686 $(align)-functions=4) -cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8,$(call cc-option,-march=athlon,-march=i686 $(align)-functions=4)) +cflags-$(CONFIG_MK7) += -march=athlon +cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8,-march=athlon) cflags-$(CONFIG_MCRUSOE) += -march=i686 $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0 cflags-$(CONFIG_MEFFICEON) += -march=i686 $(call tune,pentium3) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0 cflags-$(CONFIG_MWINCHIPC6) += $(call cc-option,-march=winchip-c6,-march=i586) @@ -37,5 +37,5 @@ cflags-$(CONFIG_MVIAC3_2) += $(call cc-option,-march=c3-2,-march=i686) cflags-$(CONFIG_X86_ELAN) += -march=i486 # Geode GX1 support -cflags-$(CONFIG_MGEODEGX1) += $(call cc-option,-march=pentium-mmx,-march=i486) +cflags-$(CONFIG_MGEODEGX1) += -march=pentium-mmx -- cgit v1.2.2 From 7e7f358c8f8f836c504faa293fda0c1c0733b63c Mon Sep 17 00:00:00 2001 From: Brian Gerst Date: Sun, 8 Jan 2006 01:04:54 -0800 Subject: [PATCH] Split out screen_info from tty.h This makes it possible for boot code to use screen_info without dragging in all of tty.h. Signed-off-by: Brian Gerst Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/i386/boot/compressed/misc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/i386') diff --git a/arch/i386/boot/compressed/misc.c b/arch/i386/boot/compressed/misc.c index 82a807f9f5e6..f19f3a7492a5 100644 --- a/arch/i386/boot/compressed/misc.c +++ b/arch/i386/boot/compressed/misc.c @@ -11,7 +11,7 @@ #include #include -#include +#include #include #include -- cgit v1.2.2 From 987d4613e52e4f655278265aabbcc69237018b1d Mon Sep 17 00:00:00 2001 From: Dave Jones Date: Sun, 8 Jan 2006 01:05:09 -0800 Subject: [PATCH] Make apm buildable without legacy pm APM doesn't _need_ the PM_LEGACY junk, so remove it's dependancy from Kconfig, and ifdef the junk in the code. Whilst the ifdefs are ugly, when the legacy stuff gets ripped out so will the ifdefs. Signed-off-by: Dave Jones Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/i386/Kconfig | 2 +- arch/i386/kernel/apm.c | 4 ++++ 2 files changed, 5 insertions(+), 1 deletion(-) (limited to 'arch/i386') diff --git a/arch/i386/Kconfig b/arch/i386/Kconfig index 486449e9e710..810ba8c37a5f 100644 --- a/arch/i386/Kconfig +++ b/arch/i386/Kconfig @@ -699,7 +699,7 @@ depends on PM && !X86_VISWS config APM tristate "APM (Advanced Power Management) BIOS support" - depends on PM && PM_LEGACY + depends on PM ---help--- APM is a BIOS specification for saving power using several different techniques. This is mostly useful for battery powered laptops with diff --git a/arch/i386/kernel/apm.c b/arch/i386/kernel/apm.c index 2d793d4aef1a..9d8827156e54 100644 --- a/arch/i386/kernel/apm.c +++ b/arch/i386/kernel/apm.c @@ -2291,7 +2291,9 @@ static int __init apm_init(void) apm_info.disabled = 1; return -ENODEV; } +#ifdef CONFIG_PM_LEGACY pm_active = 1; +#endif /* * Set up a segment that references the real mode segment 0x40 @@ -2382,7 +2384,9 @@ static void __exit apm_exit(void) exit_kapmd = 1; while (kapmd_running) schedule(); +#ifdef CONFIG_PM_LEGACY pm_active = 0; +#endif } module_init(apm_init); -- cgit v1.2.2 From 22c4e3084eb8b88288a622a57d8b35c450a439f2 Mon Sep 17 00:00:00 2001 From: Matt Mackall Date: Sun, 8 Jan 2006 01:05:24 -0800 Subject: [PATCH] tiny: Make x86 doublefault handling optional This adds configurable support for doublefault reporting on x86 add/remove: 0/3 grow/shrink: 0/1 up/down: 0/-13048 (-13048) function old new delta cpu_init 846 786 -60 doublefault_fn 188 - -188 doublefault_stack 4096 - -4096 doublefault_tss 8704 - -8704 Signed-off-by: Matt Mackall Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/i386/kernel/Makefile | 3 ++- arch/i386/kernel/cpu/common.c | 2 ++ 2 files changed, 4 insertions(+), 1 deletion(-) (limited to 'arch/i386') diff --git a/arch/i386/kernel/Makefile b/arch/i386/kernel/Makefile index f10de0f2c5e6..4f40589e179c 100644 --- a/arch/i386/kernel/Makefile +++ b/arch/i386/kernel/Makefile @@ -7,7 +7,7 @@ extra-y := head.o init_task.o vmlinux.lds obj-y := process.o semaphore.o signal.o entry.o traps.o irq.o vm86.o \ ptrace.o time.o ioport.o ldt.o setup.o i8259.o sys_i386.o \ pci-dma.o i386_ksyms.o i387.o dmi_scan.o bootflag.o \ - doublefault.o quirks.o i8237.o + quirks.o i8237.o obj-y += cpu/ obj-y += timers/ @@ -33,6 +33,7 @@ obj-y += sysenter.o vsyscall.o obj-$(CONFIG_ACPI_SRAT) += srat.o obj-$(CONFIG_HPET_TIMER) += time_hpet.o obj-$(CONFIG_EFI) += efi.o efi_stub.o +obj-$(CONFIG_DOUBLEFAULT) += doublefault.o obj-$(CONFIG_EARLY_PRINTK) += early_printk.o EXTRA_AFLAGS := -traditional diff --git a/arch/i386/kernel/cpu/common.c b/arch/i386/kernel/cpu/common.c index cca655688ffc..170400879f44 100644 --- a/arch/i386/kernel/cpu/common.c +++ b/arch/i386/kernel/cpu/common.c @@ -609,8 +609,10 @@ void __devinit cpu_init(void) load_TR_desc(); load_LDT(&init_mm.context); +#ifdef CONFIG_DOUBLEFAULT /* Set up doublefault TSS pointer in the GDT */ __set_tss_desc(cpu, GDT_ENTRY_DOUBLEFAULT_TSS, &doublefault_tss); +#endif /* Clear %fs and %gs. */ asm volatile ("xorl %eax, %eax; movl %eax, %fs; movl %eax, %gs"); -- cgit v1.2.2 From e585e47031751f4e393e10ffd922885508b958dd Mon Sep 17 00:00:00 2001 From: Matt Mackall Date: Sun, 8 Jan 2006 01:05:24 -0800 Subject: [PATCH] tiny: Make *[ug]id16 support optional Configurable 16-bit UID and friends support This allows turning off the legacy 16 bit UID interfaces on embedded platforms. text data bss dec hex filename 3330172 529036 190556 4049764 3dcb64 vmlinux-baseline 3328268 529040 190556 4047864 3dc3f8 vmlinux From: Adrian Bunk UID16 was accidentially disabled for !EMBEDDED. Signed-off-by: Matt Mackall Signed-off-by: Adrian Bunk Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/i386/Kconfig | 4 ---- 1 file changed, 4 deletions(-) (limited to 'arch/i386') diff --git a/arch/i386/Kconfig b/arch/i386/Kconfig index 810ba8c37a5f..d849c6870e3a 100644 --- a/arch/i386/Kconfig +++ b/arch/i386/Kconfig @@ -29,10 +29,6 @@ config MMU config SBUS bool -config UID16 - bool - default y - config GENERIC_ISA_DMA bool default y -- cgit v1.2.2 From 64ca9004b819ab87648dbfc78f3ef49ee491343e Mon Sep 17 00:00:00 2001 From: Matt Mackall Date: Sun, 8 Jan 2006 01:05:26 -0800 Subject: [PATCH] Make vm86 support optional This adds an option to remove vm86 support under CONFIG_EMBEDDED. Saves about 5k. This version eliminates most of the #ifdefs of the previous version and instead uses function stubs in vm86.h. Also, release_vm86_irqs is moved from asm-i386/irq.h to a more appropriate home in vm86.h so that the stubs can live together. $ size vmlinux-baseline vmlinux-novm86 text data bss dec hex filename 2920821 523232 190652 3634705 377611 vmlinux-baseline 2916268 523100 190492 3629860 376324 vmlinux-novm86 Signed-off-by: Matt Mackall Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/i386/kernel/Makefile | 3 ++- arch/i386/kernel/entry.S | 2 ++ arch/i386/kernel/process.c | 1 + 3 files changed, 5 insertions(+), 1 deletion(-) (limited to 'arch/i386') diff --git a/arch/i386/kernel/Makefile b/arch/i386/kernel/Makefile index 4f40589e179c..be1880bb75b4 100644 --- a/arch/i386/kernel/Makefile +++ b/arch/i386/kernel/Makefile @@ -4,7 +4,7 @@ extra-y := head.o init_task.o vmlinux.lds -obj-y := process.o semaphore.o signal.o entry.o traps.o irq.o vm86.o \ +obj-y := process.o semaphore.o signal.o entry.o traps.o irq.o \ ptrace.o time.o ioport.o ldt.o setup.o i8259.o sys_i386.o \ pci-dma.o i386_ksyms.o i387.o dmi_scan.o bootflag.o \ quirks.o i8237.o @@ -34,6 +34,7 @@ obj-$(CONFIG_ACPI_SRAT) += srat.o obj-$(CONFIG_HPET_TIMER) += time_hpet.o obj-$(CONFIG_EFI) += efi.o efi_stub.o obj-$(CONFIG_DOUBLEFAULT) += doublefault.o +obj-$(CONFIG_VM86) += vm86.o obj-$(CONFIG_EARLY_PRINTK) += early_printk.o EXTRA_AFLAGS := -traditional diff --git a/arch/i386/kernel/entry.S b/arch/i386/kernel/entry.S index 607c06007508..4d704724b2f5 100644 --- a/arch/i386/kernel/entry.S +++ b/arch/i386/kernel/entry.S @@ -323,6 +323,7 @@ work_notifysig: # deal with pending signals and ALIGN work_notifysig_v86: +#ifdef CONFIG_VM86 pushl %ecx # save ti_flags for do_notify_resume call save_v86_state # %eax contains pt_regs pointer popl %ecx @@ -330,6 +331,7 @@ work_notifysig_v86: xorl %edx, %edx call do_notify_resume jmp resume_userspace +#endif # perform syscall exit tracing ALIGN diff --git a/arch/i386/kernel/process.c b/arch/i386/kernel/process.c index 45e7f0ac4b04..035928f3f6c1 100644 --- a/arch/i386/kernel/process.c +++ b/arch/i386/kernel/process.c @@ -48,6 +48,7 @@ #include #include #include +#include #ifdef CONFIG_MATH_EMULATION #include #endif -- cgit v1.2.2