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7064d865af
linux/arch/x86
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Shaohua Li 7064d865af x86: Avoid tlbstate lock if not enough cpus 
This one isn't related to previous patch. If online cpus are
below NUM_INVALIDATE_TLB_VECTORS, we don't need the lock. The
comments in the code declares we don't need the check, but a hot
lock still needs an atomic operation and expensive, so add the
check here.

Uses nr_cpu_ids here as suggested by Eric Dumazet.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Andi Kleen <andi@firstfloor.org>
LKML-Reference: <1295232730.1949.710.camel@sli10-conroe>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-14 13:03:08 +01:00
..
boot x86: support XZ-compressed kernel 2011-01-13 08:03:25 -08:00
configs defconfig reduction 2010-08-14 22:26:53 +02:00
crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2011-01-13 10:25:58 -08:00
ia32 BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
include/asm x86: Scale up the number of TLB invalidate vectors with NR_CPUs, up to 32 2011-02-14 13:03:08 +01:00
kernel x86: Allocate 32 tlb_invalidate_interrupt handler stubs 2011-02-14 13:03:08 +01:00
kvm KVM: SVM: Make sure KERNEL_GS_BASE is valid when loading gs_index 2011-02-09 18:31:36 +02:00
lguest LGUEST_GUEST: fix unmet direct dependencies (VIRTUALIZATION && VIRTIO) 2011-01-20 21:37:30 +10:30
lib x86: udelay: Use this_cpu_read to avoid address calculation 2011-01-04 06:08:55 +01:00
math-emu x86, fpu: Unbreak FPU emulation 2010-05-10 13:37:16 -07:00
mm x86: Avoid tlbstate lock if not enough cpus 2011-02-14 13:03:08 +01:00
oprofile Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-01-11 11:02:13 -08:00
pci Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 2011-01-14 09:29:05 -08:00
platform x86: OLPC: convert olpc-xo1 driver from pci device to platform device 2011-01-14 12:38:15 +01:00
power x86, tsc, sched: Recompute cyc2ns_offset's during resume from sleep states 2010-08-20 14:59:02 +02:00
tools x86: Remove trailing spaces in messages 2010-02-07 17:47:51 +01:00
vdso x86, gcc-4.6: Use gcc -m options when building vdso 2010-12-13 16:08:37 -08:00
video
xen xen/setup: Route halt operations to safe_halt pvop. 2011-01-27 12:00:24 -05:00
.gitignore add random binaries to .gitignore 2010-04-08 11:34:34 +02:00
Kbuild x86: Add platform directory 2010-10-27 14:30:01 +02:00
Kconfig kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT 2011-01-20 17:02:05 -08:00
Kconfig.cpu kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT 2011-01-20 17:02:05 -08:00
Kconfig.debug kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT 2011-01-20 17:02:05 -08:00
Makefile Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-10-21 13:06:00 -07:00
Makefile_32.cpu jump label: Add work around to i386 gcc asm goto bug 2010-10-29 14:45:29 -04:00