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Message-ID: <20210505111525.187225172@infradead.org>
User-Agent: quilt/0.66
Date:   Wed, 05 May 2021 12:59:44 +0200
From:   Peter Zijlstra <peterz@infradead.org>
To:     tglx@linutronix.de, mingo@kernel.org, juri.lelli@redhat.com,
        vincent.guittot@linaro.org, dietmar.eggemann@arm.com,
        rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de,
        bristot@redhat.com, bsingharora@gmail.com, pbonzini@redhat.com,
        maz@kernel.org
Cc:     linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
        peterz@infradead.org, riel@surriel.com, hannes@cmpxchg.org
Subject: [PATCH 4/6] kvm: Select SCHED_INFO instead of TASK_DELAY_ACCT
References: <20210505105940.190490250@infradead.org>
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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) <peterz@infradead.org>
---
 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