Wanpeng Li 010fd37fdd KVM: LAPIC: Reduce world switch latency caused by timer_advance_ns ... All the checks in lapic_timer_int_injected(), __kvm_wait_lapic_expire(), and these function calls waste cpu cycles when the timer mode is not tscdeadline. We can observe ~1.3% world switch time overhead by kvm-unit-tests/vmexit.flat vmcall testing on AMD server. This patch reduces the world switch latency caused by timer_advance_ns feature when the timer mode is not tscdeadline by simpling move the check against apic->lapic_timer.expired_tscdeadline much earlier. Signed-off-by: Wanpeng Li <wanpengli@tencent.com> Message-Id: <1599731444-3525-7-git-send-email-wanpengli@tencent.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2020-09-28 07:57:10 -04:00
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include	KVM/arm64 fixes for Linux 5.9, take #1	2020-09-11 13:12:11 -04:00
kernel	Merge branch 'x86-seves-for-paolo' of https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into HEAD	2020-09-22 06:43:17 -04:00
kvm	KVM: LAPIC: Reduce world switch latency caused by timer_advance_ns	2020-09-28 07:57:10 -04:00
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