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Stephane Eranian d3a4f48d48 [PATCH] x86-64 TIF flags for debug regs and io bitmap in ctxsw 
Hello,

Following my discussion with Andi. Here is a patch that introduces
two new TIF flags to simplify the context switch code in __switch_to().
The idea is to minimize the number of cache lines accessed in the common
case, i.e., when neither the debug registers nor the I/O bitmap are used.

This patch covers the x86-64 modifications. A patch for i386 follows.

Changelog:
	- add TIF_DEBUG to track when debug registers are active
	- add TIF_IO_BITMAP to track when I/O bitmap is used
	- modify __switch_to() to use the new TIF flags

<signed-off-by>: eranian@hpl.hp.com

Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26 10:52:28 +02:00
..
8253pit.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
a.out.h
[PATCH] x86_64: TASK_SIZE fixes for compatibility mode processes
2005-06-21 18:46:12 -07:00
acpi.h
Revert "[PATCH] x86_64: Only do the clustered systems have unsynchronized TSC assumption on IBM systems"
2006-02-27 20:41:56 -08:00
agp.h
[PATCH] AGP fix for Xen VMM
2005-06-07 12:35:43 -07:00
alternative.h
[PATCH] x86_64: Remove alternative_smp
2006-08-30 16:05:15 -07:00
apic.h
[PATCH] x86_64: Add cpu_relax to apic_wait_icr_idle
2006-06-26 10:48:21 -07:00
apicdef.h
x86_64: Remove stale lapic definition from apicdef.h
2006-04-01 22:50:03 -05:00
atomic.h
[PATCH] x86_64: x86_64 version of the smp alternative patch.
2006-06-26 10:48:14 -07:00
auxvec.h
[PATCH] auxiliary vector cleanups
2005-09-07 16:57:21 -07:00
bitops.h
[PATCH] x86_64: x86_64 version of the smp alternative patch.
2006-06-26 10:48:14 -07:00
boot.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
bootsetup.h
[PATCH] Increase number of e820 entries hard limit from 32 to 128
2005-05-01 08:58:51 -07:00
bug.h
[PATCH] x86-64: reduce x86-64 bug frame by 4 bytes
2005-09-12 10:50:58 -07:00
bugs.h
Don't include linux/config.h from anywhere else in include/
2006-04-26 12:56:16 +01:00
byteorder.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
cache.h
Don't include linux/config.h from anywhere else in include/
2006-04-26 12:56:16 +01:00
cacheflush.h
[PATCH] x86/x86_64: mark rodata section read-only: x86-64 support
2006-01-06 08:33:36 -08:00
calgary.h
[PATCH] x86_64: Calgary IOMMU - Multi-Node NULL pointer dereference fix
2006-07-29 20:59:55 -07:00
calling.h
Don't include linux/config.h from anywhere else in include/
2006-04-26 12:56:16 +01:00
checksum.h
[NET]: Fix ipl=>ihl typo in ip_fast_csum
2005-08-29 16:02:48 -07:00
compat.h
[PATCH] amd64: task_pt_regs()
2006-01-12 09:08:51 -08:00
cpu.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
cpufeature.h
[PATCH] x86_64: i386/x86-64 Add nmi watchdog support for new Intel CPUs
2006-06-26 10:48:22 -07:00
cputime.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
current.h
kbuild: alpha,x86_64 use generic asm-offsets.h support
2005-09-09 21:28:48 +02:00
debugreg.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
delay.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
desc.h
[PATCH] x86_64: Align and pad x86_64 GDT on page boundary
2006-01-11 19:04:53 -08:00
div64.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
dma-mapping.h
[PATCH] x86_64: Calgary IOMMU - move valid_dma_direction into the callers
2006-06-26 10:48:18 -07:00
dma.h
[PATCH] x86_64: Remove long obsolete CVS
2006-06-26 10:48:16 -07:00
dmi.h
[PATCH] x86_64: Implement early DMI scanning
2006-03-25 09:10:55 -08:00
dwarf2.h
Don't include linux/config.h from anywhere else in include/
2006-04-26 12:56:16 +01:00
e820.h
[PATCH] x86_64: Avoid EBDA area in early boot allocator
2006-05-08 09:34:56 -07:00
edac.h
[PATCH] EDAC: core EDAC support code
2006-01-18 19:20:31 -08:00
elf.h
[PATCH] Fix 'make headers_check' on x86_64
2006-09-16 12:54:32 -07:00
emergency-restart.h
[PATCH] x86_64: Implemenent machine_emergency_restart
2005-07-26 14:35:42 -07:00
errno.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
fcntl.h
[PATCH] Clean up struct flock definitions
2005-09-07 16:57:38 -07:00
fixmap.h
Don't include linux/config.h from anywhere else in include/
2006-04-26 12:56:16 +01:00
floppy.h
[PATCH] irq-flags: x86_64: Use the new IRQF_ constants
2006-07-02 13:58:49 -07:00
fpu32.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
futex.h
[PATCH] lightweight robust futexes updates
2006-03-27 08:44:49 -08:00
genapic.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
hardirq.h
Don't include linux/config.h from anywhere else in include/
2006-04-26 12:56:16 +01:00
hpet.h
[PATCH] x86_64: Rename oem_force_hpet_timer to apic_is_clustered_box
2006-06-26 10:48:19 -07:00
hw_irq.h
[PATCH] genirq: add ->retrigger() irq op to consolidate hw_irq_resend()
2006-06-29 10:26:23 -07:00
i387.h
[PATCH] i386/x86-64: Fix x87 information leak between processes
2006-04-20 07:58:11 -07:00
ia32_unistd.h
[PATCH] x86_64: Remove most of ia32_unistd.h
2006-06-26 10:48:15 -07:00
ia32.h
Don't include linux/config.h from anywhere else in include/
2006-04-26 12:56:16 +01:00
ide.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
idle.h
[PATCH] x86_64: Add idle notifiers
2006-01-11 19:04:55 -08:00
intel_arch_perfmon.h
[PATCH] x86: i386/x86-64 Add nmi watchdog support for new Intel CPUs
2006-09-26 10:52:27 +02:00
io_apic.h
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
2006-05-24 09:22:21 +01:00
io.h
Don't include linux/config.h from anywhere else in include/
2006-04-26 12:56:16 +01:00
ioctl.h
[PATCH] Generic ioctl.h
2006-01-10 08:01:34 -08:00
ioctls.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
ipcbuf.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
ipi.h
[PATCH] x86_64: Remove useless KDB vector
2006-01-11 19:05:00 -08:00
irq.h
[PATCH] x86_64: Increase NR_IRQ_VECTORS to 32 * NR_CPUS
2006-01-16 11:27:59 -08:00
irqflags.h
[PATCH] lockdep: irqtrace cleanup of include/asm-x86_64/irqflags.h
2006-07-03 15:27:03 -07:00
k8.h
[PATCH] x86_64: Clean and enhance up K8 northbridge access code
2006-06-26 10:48:15 -07:00
Kbuild
[HEADERS] One line per header in Kbuild files to reduce conflicts
2006-09-19 12:43:58 +01:00
kdebug.h
[PATCH] lockdep: beautify x86_64 stacktraces
2006-07-03 15:27:02 -07:00
kexec.h
[PATCH] Compilation of kexec/kdump broken
2006-02-03 08:32:09 -08:00
kmap_types.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
kprobes.h
[PATCH] IA64: kprobe invalidate icache of jump buffer
2006-07-31 13:28:38 -07:00
ldt.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
linkage.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
local.h
[PATCH] x86_64: Fix race in cpu_local_* on preemptible kernels
2006-06-26 10:48:21 -07:00
mach_apic.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
mc146818rtc.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
mce.h
[PATCH] x86_64: mce_amd support for family 0x10 processors
2006-06-26 10:48:20 -07:00
mman.h
[PATCH] add asm-generic/mman.h
2006-02-15 15:32:22 -08:00
mmsegment.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
mmu_context.h
Don't include linux/config.h from anywhere else in include/
2006-04-26 12:56:16 +01:00
mmu.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
mmx.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
mmzone.h
[PATCH] Delete unused definitions of kvaddr_to_nid
2006-06-23 07:42:52 -07:00
module.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
mpspec.h
Pull pnpacpi into acpica branch
2006-01-07 03:50:18 -05:00
msgbuf.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
msi.h
[PATCH] PCI: cleanup unused variable about msi driver
2006-06-21 12:00:00 -07:00
msr.h
[PATCH] Add macros for rdtscp
2006-09-26 10:52:28 +02:00
mtrr.h
Move inclusion of <linux/compat.h> out of user scope in asm-x86_64/mtrr.h
2006-05-21 22:51:13 +01:00
mutex.h
[PATCH] x86_64: x86_64 version of the smp alternative patch.
2006-06-26 10:48:14 -07:00
namei.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
nmi.h
[PATCH] Fix up panic messages for different NMI panics
2006-09-26 10:52:27 +02:00
node.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
numa.h
[PATCH] Unify pxm_to_node() and node_to_pxm()
2006-06-23 07:42:48 -07:00
page.h
[PATCH] x86_64: Enlarge debug stack for nested kprobes
2006-07-28 19:28:00 -07:00
param.h
Don't include linux/config.h from anywhere else in include/
2006-04-26 12:56:16 +01:00
parport.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
pci-direct.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
pci.h
[PATCH] x86_64: Calgary IOMMU - Calgary specific bits
2006-06-26 10:48:19 -07:00
pda.h
[PATCH] x86_64: Reorder one field of the PDA to reduce padding
2006-03-25 09:10:56 -08:00
percpu.h
[PATCH] lockdep: add per_cpu_offset()
2006-07-03 15:27:00 -07:00
pgalloc.h
[PATCH] x86_64: actively synchronize vmalloc area when registering certain callbacks
2006-03-25 09:10:53 -08:00
pgtable.h
[PATCH] x86_64: Get rid of pud_offset_k / __pud_offset_k
2006-06-26 10:48:18 -07:00
poll.h
[PATCH] POLLRDHUP/EPOLLRDHUP handling for half-closed devices notifications
2006-03-25 08:22:56 -08:00
posix_types.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
prctl.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
processor.h
[PATCH] x86_64: Save original IST values for checking stack addresses
2006-08-30 16:05:16 -07:00
proto.h
[PATCH] Add initalization of the RDTSCP auxilliary values
2006-09-26 10:52:28 +02:00
ptrace.h
[PATCH] xen: x86: Rename usermode macro
2005-06-23 09:45:14 -07:00
resource.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
rtc.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
rwlock.h
[PATCH] x86_64: x86_64 version of the smp alternative patch.
2006-06-26 10:48:14 -07:00
scatterlist.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
seccomp.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
sections.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
segment.h
[PATCH] Add the vgetcpu vsyscall
2006-09-26 10:52:28 +02:00
semaphore.h
[PATCH] x86_64: x86_64 version of the smp alternative patch.
2006-06-26 10:48:14 -07:00
sembuf.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
serial.h
Don't include linux/config.h from anywhere else in include/
2006-04-26 12:56:16 +01:00
setup.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
shmbuf.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
shmparam.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
sigcontext32.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
sigcontext.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
siginfo.h
[PATCH] consolidate SIGEV_PAD_SIZE
2005-05-01 08:59:08 -07:00
signal.h
[PATCH] Add TIF_RESTORE_SIGMASK
2006-09-26 10:52:26 +02:00
smp.h
[PATCH] Clean up asm/smp.h includes
2006-09-26 10:52:28 +02:00
socket.h
[AF_UNIX]: Datagram getpeersec
2006-06-29 16:58:06 -07:00
sockios.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
sparsemem.h
[PATCH] add x86-64 specific support for sparsemem
2005-06-23 09:45:07 -07:00
spinlock_types.h
[PATCH] spinlock consolidation
2005-09-10 10:06:21 -07:00
spinlock.h
[PATCH] x86_64: Remove alternative_smp
2006-08-30 16:05:15 -07:00
stat.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
statfs.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
string.h
[PATCH] x86_64: Use __always_inline for __inline_memcpy
2006-06-26 10:48:14 -07:00
suspend.h
[PATCH] x86_64: eliminate set_debug()
2006-03-25 09:10:52 -08:00
swiotlb.h
[PATCH] x86_64: Fix swiotlb=force
2006-07-29 20:59:55 -07:00
system.h
[PATCH] remove set_wmb - arch removal
2006-07-14 21:56:14 -07:00
tce.h
[PATCH] x86_64: Fix Calgary copyright statements per IBM guidelines
2006-07-10 15:12:33 -07:00
termbits.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
termios.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
thread_info.h
[PATCH] x86-64 TIF flags for debug regs and io bitmap in ctxsw
2006-09-26 10:52:28 +02:00
timex.h
[PATCH] x86_64: fix sync before RDTSC on Intel cpus
2006-04-11 06:38:57 -07:00
tlb.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
tlbflush.h
Don't include linux/config.h from anywhere else in include/
2006-04-26 12:56:16 +01:00
topology.h
[PATCH] sched: mc/smt power savings sched policy
2006-06-27 17:32:45 -07:00
types.h
[PATCH] sab: consolidate kmem_bufctl_t
2005-09-05 00:05:48 -07:00
uaccess.h
Don't include linux/config.h from anywhere else in include/
2006-04-26 12:56:16 +01:00
ucontext.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
unaligned.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
unistd.h
[PATCH] Add ppoll/pselect syscalls
2006-09-26 10:52:27 +02:00
unwind.h
[PATCH] x86: Make backtracer fallback logic more bullet-proof
2006-08-30 16:05:15 -07:00
user32.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
user.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
vga.h
[PATCH] vgacon: make VGA_MAP_MEM take size, remove extra use
2006-06-22 15:05:58 -07:00
vsyscall32.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
vsyscall.h
[PATCH] Add the vgetcpu vsyscall
2006-09-26 10:52:28 +02:00
xor.h
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00