From: Bradley Morgan <include@grrlz.net>
To: Marc Zyngier <maz@kernel.org>, Oliver Upton <oupton@kernel.org>
Cc: Fuad Tabba <tabba@google.com>, Joey Gouly <joey.gouly@arm.com>,
Steffen Eiden <seiden@linux.ibm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Zenghui Yu <yuzenghui@huawei.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev,
linux-kernel@vger.kernel.org, Bradley Morgan <include@grrlz.net>
Subject: [PATCH] KVM: arm64: account pKVM reclaim against the VM mm
Date: Sun, 21 Jun 2026 21:31:55 +0000 [thread overview]
Message-ID: <20260621213155.6019-1-include@grrlz.net> (raw)
Protected guest faults charge long term pins to the VM's mm. Teardown
can run later from file release, where current->mm may be unrelated.
Drop the charge from kvm->mm instead.
Fixes: 4e6e03f9eadd ("KVM: arm64: Hook up reclaim hypercall to pkvm_pgtable_stage2_destroy()")
Signed-off-by: Bradley Morgan <include@grrlz.net>
---
arch/arm64/kvm/pkvm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/kvm/pkvm.c b/arch/arm64/kvm/pkvm.c
index 053e4f733e4b..428723b1b0f5 100644
--- a/arch/arm64/kvm/pkvm.c
+++ b/arch/arm64/kvm/pkvm.c
@@ -352,7 +352,7 @@ static int __pkvm_pgtable_stage2_reclaim(struct kvm_pgtable *pgt, u64 start, u64
page = pfn_to_page(mapping->pfn);
WARN_ON_ONCE(mapping->nr_pages != 1);
unpin_user_pages_dirty_lock(&page, 1, true);
- account_locked_vm(current->mm, 1, false);
+ account_locked_vm(kvm->mm, 1, false);
pkvm_mapping_remove(mapping, &pgt->pkvm_mappings);
kfree(mapping);
}
--
2.53.0
reply other threads:[~2026-06-21 21:41 UTC|newest]
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