diff options
| author |   Ingo Molnar <mingo@elte.hu> | 2009-06-01 21:06:21 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-06-01 21:06:21 +0200 |
| commit | 3d58f48ba05caed9118bce62b3047f8683438835 (patch) | |
| tree | 94c911034f0e14ded73d3e9e6e9f8e22b6cad822 /arch/x86/Kconfig | |
| parent | x86: enable_update_mptable should be a macro (diff) | |
| parent | Merge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging (diff) | |
| download | linux-dev-3d58f48ba05caed9118bce62b3047f8683438835.tar.xz linux-dev-3d58f48ba05caed9118bce62b3047f8683438835.zip | |
Merge branch 'linus' into irq/numa
Conflicts:
arch/mips/sibyte/bcm1480/irq.c
arch/mips/sibyte/sb1250/irq.c
Merge reason: we gathered a few conflicts plus update to latest upstream fixes.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/Kconfig')
| -rw-r--r-- | arch/x86/Kconfig | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index e03485b2828a..b1d3f60525c0 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -492,6 +492,19 @@ config PARAVIRT over full virtualization. However, when run without a hypervisor the kernel is theoretically slower and slightly larger. +config PARAVIRT_SPINLOCKS + bool "Paravirtualization layer for spinlocks" + depends on PARAVIRT && SMP && EXPERIMENTAL + ---help--- + Paravirtualized spinlocks allow a pvops backend to replace the + spinlock implementation with something virtualization-friendly + (for example, block the virtual CPU rather than spinning). + + Unfortunately the downside is an up to 5% performance hit on + native kernels, with various workloads. + + If you are unsure how to answer this question, answer N. + config PARAVIRT_CLOCK bool default n |