https://github.com/torvalds/linux
Revision 46dc111dfe47bf47f23884cade3c8a355be87c8c authored by Linus Torvalds on 27 April 2018, 23:13:31 UTC, committed by Linus Torvalds on 27 April 2018, 23:13:31 UTC
Pull KVM fixes from Radim Krčmář: "ARM: - PSCI selection API, a leftover from 4.16 (for stable) - Kick vcpu on active interrupt affinity change - Plug a VMID allocation race on oversubscribed systems - Silence debug messages - Update Christoffer's email address (linaro -> arm) x86: - Expose userspace-relevant bits of a newly added feature - Fix TLB flushing on VMX with VPID, but without EPT" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: x86/headers/UAPI: Move DISABLE_EXITS KVM capability bits to the UAPI kvm: apic: Flush TLB after APIC mode/address change if VPIDs are in use arm/arm64: KVM: Add PSCI version selection API KVM: arm/arm64: vgic: Kick new VCPU on interrupt migration arm64: KVM: Demote SVE and LORegion warnings to debug only MAINTAINERS: Update e-mail address for Christoffer Dall KVM: arm/arm64: Close VMID generation race
Tip revision: 46dc111dfe47bf47f23884cade3c8a355be87c8c authored by Linus Torvalds on 27 April 2018, 23:13:31 UTC
rMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
rMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Tip revision: 46dc111
Kconfig.hz
#
# Timer Interrupt Frequency Configuration
#
choice
prompt "Timer frequency"
default HZ_250
help
Allows the configuration of the timer frequency. It is customary
to have the timer interrupt run at 1000 Hz but 100 Hz may be more
beneficial for servers and NUMA systems that do not need to have
a fast response for user interaction and that may experience bus
contention and cacheline bounces as a result of timer interrupts.
Note that the timer interrupt occurs on each processor in an SMP
environment leading to NR_CPUS * HZ number of timer interrupts
per second.
config HZ_100
bool "100 HZ"
help
100 Hz is a typical choice for servers, SMP and NUMA systems
with lots of processors that may show reduced performance if
too many timer interrupts are occurring.
config HZ_250
bool "250 HZ"
help
250 Hz is a good compromise choice allowing server performance
while also showing good interactive responsiveness even
on SMP and NUMA systems. If you are going to be using NTSC video
or multimedia, selected 300Hz instead.
config HZ_300
bool "300 HZ"
help
300 Hz is a good compromise choice allowing server performance
while also showing good interactive responsiveness even
on SMP and NUMA systems and exactly dividing by both PAL and
NTSC frame rates for video and multimedia work.
config HZ_1000
bool "1000 HZ"
help
1000 Hz is the preferred choice for desktop systems and other
systems requiring fast interactive responses to events.
endchoice
config HZ
int
default 100 if HZ_100
default 250 if HZ_250
default 300 if HZ_300
default 1000 if HZ_1000
config SCHED_HRTICK
def_bool HIGH_RES_TIMERS
Computing file changes ...