[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20220628220938.3657876-3-yosryahmed@google.com>
Date: Tue, 28 Jun 2022 22:09:36 +0000
From: Yosry Ahmed <yosryahmed@...gle.com>
To: Tejun Heo <tj@...nel.org>, Johannes Weiner <hannes@...xchg.org>,
Zefan Li <lizefan.x@...edance.com>,
Marc Zyngier <maz@...nel.org>,
James Morse <james.morse@....com>,
Alexandru Elisei <alexandru.elisei@....com>,
Suzuki K Poulose <suzuki.poulose@....com>,
Paolo Bonzini <pbonzini@...hat.com>,
Sean Christopherson <seanjc@...gle.com>,
Vitaly Kuznetsov <vkuznets@...hat.com>,
Wanpeng Li <wanpengli@...cent.com>,
Jim Mattson <jmattson@...gle.com>,
Joerg Roedel <joro@...tes.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Michal Hocko <mhocko@...nel.org>,
Roman Gushchin <roman.gushchin@...ux.dev>,
Shakeel Butt <shakeelb@...gle.com>,
Oliver Upton <oupton@...gle.com>
Cc: Huang@...gle.com, Shaoqin <shaoqin.huang@...el.com>,
cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
kvm@...r.kernel.org, linux-mm@...ck.org,
Yosry Ahmed <yosryahmed@...gle.com>
Subject: [PATCH v6 2/4] KVM: mmu: add a helper to account memory used by KVM MMU.
Add a helper to account pages used by KVM for page tables in memory
secondary pagetable stats. This function will be used by subsequent
patches in different archs.
Signed-off-by: Yosry Ahmed <yosryahmed@...gle.com>
---
include/linux/kvm_host.h | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 3b40f8d68fbb1..032821d77e920 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -2241,6 +2241,16 @@ static inline void kvm_handle_signal_exit(struct kvm_vcpu *vcpu)
}
#endif /* CONFIG_KVM_XFER_TO_GUEST_WORK */
+/*
+ * If more than one page is being (un)accounted, @virt must be the address of
+ * the first page of a block of pages what were allocated together (i.e
+ * accounted together).
+ */
+static inline void kvm_account_pgtable_pages(void *virt, int nr)
+{
+ mod_lruvec_page_state(virt_to_page(virt), NR_SECONDARY_PAGETABLE, nr);
+}
+
/*
* This defines how many reserved entries we want to keep before we
* kick the vcpu to the userspace to avoid dirty ring full. This
--
2.37.0.rc0.161.g10f37bed90-goog
Powered by blists - more mailing lists