On 05/05/21 12:59, Peter Zijlstra wrote:
> AFAICT KVM only relies on SCHED_INFO. Nothing uses the p->delays data
> that belongs to TASK_DELAY_ACCT.
>
> Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Right, SCHED_INFO didn't exist at the time (it was introduced in 2015,
while KVM started using run_delay in 2011). I'm not sure if it could
have used SCHEDSTATS instead.
Acked-by: Paolo Bonzini <[email protected]>
Paolo
> ---
> arch/arm64/kvm/Kconfig | 5 +----
> arch/x86/kvm/Kconfig | 5 +----
> 2 files changed, 2 insertions(+), 8 deletions(-)
>
> --- a/arch/arm64/kvm/Kconfig
> +++ b/arch/arm64/kvm/Kconfig
> @@ -20,8 +20,6 @@ if VIRTUALIZATION
> menuconfig KVM
> bool "Kernel-based Virtual Machine (KVM) support"
> depends on OF
> - # for TASKSTATS/TASK_DELAY_ACCT:
> - depends on NET && MULTIUSER
> select MMU_NOTIFIER
> select PREEMPT_NOTIFIERS
> select HAVE_KVM_CPU_RELAX_INTERCEPT
> @@ -38,8 +36,7 @@ menuconfig KVM
> select IRQ_BYPASS_MANAGER
> select HAVE_KVM_IRQ_BYPASS
> select HAVE_KVM_VCPU_RUN_PID_CHANGE
> - select TASKSTATS
> - select TASK_DELAY_ACCT
> + select SCHED_INFO
> help
> Support hosting virtualized guest machines.
>
> --- a/arch/x86/kvm/Kconfig
> +++ b/arch/x86/kvm/Kconfig
> @@ -22,8 +22,6 @@ config KVM
> tristate "Kernel-based Virtual Machine (KVM) support"
> depends on HAVE_KVM
> depends on HIGH_RES_TIMERS
> - # for TASKSTATS/TASK_DELAY_ACCT:
> - depends on NET && MULTIUSER
> depends on X86_LOCAL_APIC
> select PREEMPT_NOTIFIERS
> select MMU_NOTIFIER
> @@ -36,8 +34,7 @@ config KVM
> select KVM_ASYNC_PF
> select USER_RETURN_NOTIFIER
> select KVM_MMIO
> - select TASKSTATS
> - select TASK_DELAY_ACCT
> + select SCHED_INFO
> select PERF_EVENTS
> select HAVE_KVM_MSI
> select HAVE_KVM_CPU_RELAX_INTERCEPT
>
>